Perspectives for quarkonium production at the LHC€¦ · P.Artoisenet, J.Campbell, JPL, F.Maltoni,...
Transcript of Perspectives for quarkonium production at the LHC€¦ · P.Artoisenet, J.Campbell, JPL, F.Maltoni,...
Perspectives for quarkonium production at the LHC
J.P. LansbergEcole polytechnique – CPHT
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 1 / 17
Outline
What we understand:
1 why QCD corrections do matter at mid- and high-PT
What we seem to understand:
2 The CSM predictions account correctly for the yield
3 Colour Octet Dominance is challenged at low/mid PT in pp
4 QCD corrections do matter for the polarisation
What we do not understand:
5 ψ production at very large PT
What we expect from the LHC
6 More observables !
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 2 / 17
Part I
What we understand
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 3 / 17
why QCD corrections do matter at mid- and high-PT
QCD corrections for Υ at the Tevatron
J.Campbell, F. Maltoni, F. Tramontano, Phys.Rev.Lett. 98:252002,2007P.Artoisenet, J.P.L, F.Maltoni, PLB 653:60,2007
P.Artoisenet, J.Campbell, JPL, F.Maltoni, F. Tramontano, Phys. Rev. Lett. 101, 152001 (2008)
ψ or Υ
α3SP−8T
gψ or Υ
g
α4SP−6T
ψ or Υ
α5SP−4T
g
gYet, the impact of double t-channel gluon exchange at α5
S is unsure
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 4 / 17
why QCD corrections do matter at mid- and high-PT
QCD corrections for Υ at the Tevatron
J.Campbell, F. Maltoni, F. Tramontano, Phys.Rev.Lett. 98:252002,2007P.Artoisenet, J.P.L, F.Maltoni, PLB 653:60,2007
P.Artoisenet, J.Campbell, JPL, F.Maltoni, F. Tramontano, Phys. Rev. Lett. 101, 152001 (2008)
1e-04
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30 35 40
dσ/d
PT| |y
|<0.
4 x
Br
(pb/
GeV
)
PT (GeV)
ϒ(1S) prompt data x Fdirect
LO
ψ or Υ
α3SP−8T
gψ or Υ
g
α4SP−6T
ψ or Υ
α5SP−4T
g
gYet, the impact of double t-channel gluon exchange at α5
S is unsure
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 4 / 17
why QCD corrections do matter at mid- and high-PT
QCD corrections for Υ at the Tevatron
J.Campbell, F. Maltoni, F. Tramontano, Phys.Rev.Lett. 98:252002,2007P.Artoisenet, J.P.L, F.Maltoni, PLB 653:60,2007
P.Artoisenet, J.Campbell, JPL, F.Maltoni, F. Tramontano, Phys. Rev. Lett. 101, 152001 (2008)
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30 35 40
dσ/d
PT| |y
|<0.
4 x
Br
(pb/
GeV
)
PT (GeV)
ϒ(1S) prompt data x Fdirect
LO NLO
ψ or Υ
α3SP−8T
gψ or Υ
g
α4SP−6T
ψ or Υ
α5SP−4T
g
gYet, the impact of double t-channel gluon exchange at α5
S is unsure
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 4 / 17
why QCD corrections do matter at mid- and high-PT
QCD corrections for Υ at the Tevatron
J.Campbell, F. Maltoni, F. Tramontano, Phys.Rev.Lett. 98:252002,2007P.Artoisenet, J.P.L, F.Maltoni, PLB 653:60,2007
P.Artoisenet, J.Campbell, JPL, F.Maltoni, F. Tramontano, Phys. Rev. Lett. 101, 152001 (2008)
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30 35 40
dσ/d
PT| |y
|<0.
4 x
Br
(pb/
GeV
)
PT (GeV)
ϒ(1S) prompt data x Fdirect
LO NLO NNLO★
ψ or Υ
α3SP−8T
gψ or Υ
g
α4SP−6T
ψ or Υ
α5SP−4T
g
gYet, the impact of double t-channel gluon exchange at α5
S is unsure
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 4 / 17
why QCD corrections do matter at mid- and high-PT
QCD corrections for Υ at the Tevatron
J.Campbell, F. Maltoni, F. Tramontano, Phys.Rev.Lett. 98:252002,2007P.Artoisenet, J.P.L, F.Maltoni, PLB 653:60,2007
P.Artoisenet, J.Campbell, JPL, F.Maltoni, F. Tramontano, Phys. Rev. Lett. 101, 152001 (2008)
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30 35 40
dσ/d
PT| |y
|<0.
4 x
Br
(pb/
GeV
)
PT (GeV)
ϒ(3S) direct dataLO NLO NNLO★
ψ or Υ
α3SP−8T
gψ or Υ
g
α4SP−6T
ψ or Υ
α5SP−4T
g
gYet, the impact of double t-channel gluon exchange at α5
S is unsure
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 4 / 17
why QCD corrections do matter at mid- and high-PT
QCD corrections for J/ψ at RHICJPL, arXiv:1003.4319 [hep-ph]
ψ or Υ
α3SP−8T
gψ or Υ
g
α4SP−6T
ψ or Υ
α5SP−4T
g
g
Impact of t-channel gluon exchange at α5S unsure
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 5 / 17
why QCD corrections do matter at mid- and high-PT
QCD corrections for J/ψ at RHICJPL, arXiv:1003.4319 [hep-ph]
ψ or Υ
α3SP−8T
gψ or Υ
g
α4SP−6T
ψ or Υ
α5SP−4T
g
g
Impact of t-channel gluon exchange at α5S unsure
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 5 / 17
Part II
What we seem to understand
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 6 / 17
The CSM predictions account correctly for the yield
the CSM predictions account correctly for the yield (dσdy )
S. J. Brodsky and JPL, PRD 81 051502 (R), 2010
0
10
20
30
40
50
-4 -3 -2 -1 0 1 2 3 4
dσ/d
y x
Br
(nb)
y
FJ/ψdirect= 59±10 %
PHENIX (PRL 09 232002)
PHENIX (2009; Prelim.)
LO: gg → J/ψg (nothing new !, back to 1981 !)NLO: gg → J/ψ, gq → J/ψgq, ...using the matrix elements from J.Campbell, F. Maltoni, F. Tramontano, PRL 98:252002,2007
NLO+: adding one new LO contribution cg → J/ψc
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Could be studied viaazimuthalcorrelationJ/ψ + e, µ; 10-40%of the direct signal
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 7 / 17
The CSM predictions account correctly for the yield
the CSM predictions account correctly for the yield (dσdy )
S. J. Brodsky and JPL, PRD 81 051502 (R), 2010
LO: gg → J/ψg (nothing new !, back to 1981 !)
NLO: gg → J/ψ, gq → J/ψgq, ...using the matrix elements from J.Campbell, F. Maltoni, F. Tramontano, PRL 98:252002,2007
NLO+: adding one new LO contribution cg → J/ψc
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Could be studied viaazimuthalcorrelationJ/ψ + e, µ; 10-40%of the direct signal
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 7 / 17
The CSM predictions account correctly for the yield
the CSM predictions account correctly for the yield (dσdy )
S. J. Brodsky and JPL, PRD 81 051502 (R), 2010
LO: gg → J/ψg (nothing new !, back to 1981 !)
NLO: gg → J/ψ, gq → J/ψgq, ...using the matrix elements from J.Campbell, F. Maltoni, F. Tramontano, PRL 98:252002,2007
NLO+: adding one new LO contribution cg → J/ψc
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Could be studied viaazimuthalcorrelationJ/ψ + e, µ; 10-40%of the direct signal
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 7 / 17
The CSM predictions account correctly for the yield
the CSM predictions account correctly for the yield (dσdy )
S. J. Brodsky and JPL, PRD 81 051502 (R), 2010
0
10
20
30
40
50
-4 -3 -2 -1 0 1 2 3 4
dσ/d
y x
Br
(nb)
y
FJ/ψdirect= 59±10 %
PHENIX (PRL 09 232002)
PHENIX (2009; Prelim.)
NLO+
NLOLO
LO: gg → J/ψg (nothing new !, back to 1981 !)NLO: gg → J/ψ, gq → J/ψgq, ...using the matrix elements from J.Campbell, F. Maltoni, F. Tramontano, PRL 98:252002,2007
NLO+: adding one new LO contribution cg → J/ψc
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Could be studied viaazimuthalcorrelationJ/ψ + e, µ; 10-40%of the direct signal
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 7 / 17
The CSM predictions account correctly for the yield
the CSM predictions account correctly for the yield (dσdy )
S. J. Brodsky and JPL, PRD 81 051502 (R), 2010
0
10
20
30
40
50
-4 -3 -2 -1 0 1 2 3 4
dσ/d
y x
Br
(nb)
y
FJ/ψdirect= 59±10 %
PHENIX (PRL 09 232002)
PHENIX (2009; Prelim.)
NLO+
NLOLO
LO: gg → J/ψg (nothing new !, back to 1981 !)NLO: gg → J/ψ, gq → J/ψgq, ...using the matrix elements from J.Campbell, F. Maltoni, F. Tramontano, PRL 98:252002,2007
NLO+: adding one new LO contribution cg → J/ψc
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Could be studied viaazimuthalcorrelationJ/ψ + e, µ; 10-40%of the direct signal
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 7 / 17
Colour Octet Dominance is challenged at low/mid PT in pp
the Colour Octet Dominance challenged at low/mid PT in pp ?
Constraints from the PT dependence in ppComputation at NLO for CO channel: CO predictions overshoot data at lowPT
B. Gong, X. Q. Li, J.-X. Wang,PLB 673:197,2009.
The PT dependence is badly reproduced and cannot be properly fit
Strong constraints from the e+e− analyses
Recent update by Belle of e+e− → J/ψ + Xnon cc = 0.43± 0.09± 0.09 pbe+e− → J/ψgg CS at NLO + rel. corr. : 0.4-0.7 pb
no space for CO (1S0 or 3PJ) in B-factory dataY.Q.Ma,et al.,PRL102 (2009)162002;B.Gong, J.X.Wang, PRL102 (2009) 162003; Z.G. Hue et al., PRD81 (2010) 054036
e+e− → J/ψgg CO at NLO: 0.9-1.0 pb using universality from the Tevatron(Academical) reduction by a factor of 3 of the LDMEs, if one ignores the CSM
Y. Zhang et al., PRD81:034015,2010.
Actually, the reduction is much stronger andthe CS channel dominates over CO at low/mid PT in pp
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 8 / 17
Colour Octet Dominance is challenged at low/mid PT in pp
the Colour Octet Dominance challenged at low/mid PT in pp ?
Constraints from the PT dependence in ppComputation at NLO for CO channel: CO predictions overshoot data at lowPT
B. Gong, X. Q. Li, J.-X. Wang,PLB 673:197,2009.
The PT dependence is badly reproduced and cannot be properly fit
Strong constraints from the e+e− analyses
Recent update by Belle of e+e− → J/ψ + Xnon cc = 0.43± 0.09± 0.09 pbe+e− → J/ψgg CS at NLO + rel. corr. : 0.4-0.7 pb
no space for CO (1S0 or 3PJ) in B-factory dataY.Q.Ma,et al.,PRL102 (2009)162002;B.Gong, J.X.Wang, PRL102 (2009) 162003; Z.G. Hue et al., PRD81 (2010) 054036
e+e− → J/ψgg CO at NLO: 0.9-1.0 pb using universality from the Tevatron(Academical) reduction by a factor of 3 of the LDMEs, if one ignores the CSM
Y. Zhang et al., PRD81:034015,2010.
Actually, the reduction is much stronger andthe CS channel dominates over CO at low/mid PT in pp
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 8 / 17
Colour Octet Dominance is challenged at low/mid PT in pp
the Colour Octet Dominance challenged at low/mid PT in pp ?
Constraints from the PT dependence in ppComputation at NLO for CO channel: CO predictions overshoot data at lowPT
B. Gong, X. Q. Li, J.-X. Wang,PLB 673:197,2009.
The PT dependence is badly reproduced and cannot be properly fit
Strong constraints from the e+e− analyses
Recent update by Belle of e+e− → J/ψ + Xnon cc = 0.43± 0.09± 0.09 pb
e+e− → J/ψgg CS at NLO + rel. corr. : 0.4-0.7 pbno space for CO (1S0 or 3PJ) in B-factory data
Y.Q.Ma,et al.,PRL102 (2009)162002;B.Gong, J.X.Wang, PRL102 (2009) 162003; Z.G. Hue et al., PRD81 (2010) 054036
e+e− → J/ψgg CO at NLO: 0.9-1.0 pb using universality from the Tevatron(Academical) reduction by a factor of 3 of the LDMEs, if one ignores the CSM
Y. Zhang et al., PRD81:034015,2010.
Actually, the reduction is much stronger andthe CS channel dominates over CO at low/mid PT in pp
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 8 / 17
Colour Octet Dominance is challenged at low/mid PT in pp
the Colour Octet Dominance challenged at low/mid PT in pp ?
Constraints from the PT dependence in ppComputation at NLO for CO channel: CO predictions overshoot data at lowPT
B. Gong, X. Q. Li, J.-X. Wang,PLB 673:197,2009.
The PT dependence is badly reproduced and cannot be properly fit
Strong constraints from the e+e− analyses
Recent update by Belle of e+e− → J/ψ + Xnon cc = 0.43± 0.09± 0.09 pbe+e− → J/ψgg CS at NLO + rel. corr. : 0.4-0.7 pb
no space for CO (1S0 or 3PJ) in B-factory dataY.Q.Ma,et al.,PRL102 (2009)162002;B.Gong, J.X.Wang, PRL102 (2009) 162003; Z.G. Hue et al., PRD81 (2010) 054036
e+e− → J/ψgg CO at NLO: 0.9-1.0 pb using universality from the Tevatron(Academical) reduction by a factor of 3 of the LDMEs, if one ignores the CSM
Y. Zhang et al., PRD81:034015,2010.
Actually, the reduction is much stronger andthe CS channel dominates over CO at low/mid PT in pp
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 8 / 17
Colour Octet Dominance is challenged at low/mid PT in pp
the Colour Octet Dominance challenged at low/mid PT in pp ?
Constraints from the PT dependence in ppComputation at NLO for CO channel: CO predictions overshoot data at lowPT
B. Gong, X. Q. Li, J.-X. Wang,PLB 673:197,2009.
The PT dependence is badly reproduced and cannot be properly fit
Strong constraints from the e+e− analyses
Recent update by Belle of e+e− → J/ψ + Xnon cc = 0.43± 0.09± 0.09 pbe+e− → J/ψgg CS at NLO + rel. corr. : 0.4-0.7 pb
no space for CO (1S0 or 3PJ) in B-factory dataY.Q.Ma,et al.,PRL102 (2009)162002;B.Gong, J.X.Wang, PRL102 (2009) 162003; Z.G. Hue et al., PRD81 (2010) 054036
e+e− → J/ψgg CO at NLO: 0.9-1.0 pb using universality from the Tevatron(Academical) reduction by a factor of 3 of the LDMEs, if one ignores the CSM
Y. Zhang et al., PRD81:034015,2010.
Actually, the reduction is much stronger andthe CS channel dominates over CO at low/mid PT in pp
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 8 / 17
Colour Octet Dominance is challenged at low/mid PT in pp
the Colour Octet Dominance challenged at low/mid PT in pp ?
Constraints from the PT dependence in ppComputation at NLO for CO channel: CO predictions overshoot data at lowPT
B. Gong, X. Q. Li, J.-X. Wang,PLB 673:197,2009.
The PT dependence is badly reproduced and cannot be properly fit
Strong constraints from the e+e− analyses
Recent update by Belle of e+e− → J/ψ + Xnon cc = 0.43± 0.09± 0.09 pbe+e− → J/ψgg CS at NLO + rel. corr. : 0.4-0.7 pb
no space for CO (1S0 or 3PJ) in B-factory dataY.Q.Ma,et al.,PRL102 (2009)162002;B.Gong, J.X.Wang, PRL102 (2009) 162003; Z.G. Hue et al., PRD81 (2010) 054036
e+e− → J/ψgg CO at NLO: 0.9-1.0 pb using universality from the Tevatron(Academical) reduction by a factor of 3 of the LDMEs, if one ignores the CSM
Y. Zhang et al., PRD81:034015,2010.
Actually, the reduction is much stronger andthe CS channel dominates over CO at low/mid PT in pp
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 8 / 17
QCD corrections do matter for the polarisation
Υ & ψ polarisation in hadroproduction at O(α4S) & O(α5
S)
P.Artoisenet, J.Campbell, JPL, F.Maltoni, F. Tramontano, Phys. Rev. Lett. 101,152001,2008B. Gong, J.X Wang, Phys. Rev. Lett. 100,232001,2008.
JPL, EPJC 61,693,2009.JPL, arXiv:1003.4319 [hep-ph]
-1
-0.5
0
0.5
1
0 1 2 3 4 5
α=(σ
T-2
σ L)/
(σT+
2σL)
PT (GeV)
helicity frame (|y|<0.35)
NLO from gq+gg LO from gg
-1
-0.5
0
0.5
1
1.5
2
2.5
5 10 15 20 25 30 35 40 45 50
α =
(σT-2
σ L)/
(σT+
2σL)
PT (GeV)
Direct ψ(2S) CDF data at s1/2=1.96 TeVLO NLO NNLO★
-1
-0.5
0
0.5
1
10 15 20 25 30 35 40 45 50
α =
(σT-2
σ L)/
(σT+
2σL)
PT (GeV)
LO ϒ+ bb NLO NNLO★
Þ Complete modification of the polarisation at NLO (also at NNLO?)
Þ Yield from kT factorisation is also longitudinal (in the helicity frame)
Þ This is not yet explained by simple arguments(although reasonable)
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 9 / 17
QCD corrections do matter for the polarisation
Υ & ψ polarisation in hadroproduction at O(α4S) & O(α5
S)
P.Artoisenet, J.Campbell, JPL, F.Maltoni, F. Tramontano, Phys. Rev. Lett. 101,152001,2008B. Gong, J.X Wang, Phys. Rev. Lett. 100,232001,2008.
JPL, EPJC 61,693,2009.JPL, arXiv:1003.4319 [hep-ph]
-1
-0.5
0
0.5
1
0 1 2 3 4 5
α=(σ
T-2
σ L)/
(σT+
2σL)
PT (GeV)
helicity frame (|y|<0.35)
NLO from gq+gg LO from gg
-1
-0.5
0
0.5
1
1.5
2
2.5
5 10 15 20 25 30 35 40 45 50
α =
(σT-2
σ L)/
(σT+
2σL)
PT (GeV)
Direct ψ(2S) CDF data at s1/2=1.96 TeVLO NLO NNLO★
-1
-0.5
0
0.5
1
10 15 20 25 30 35 40 45 50
α =
(σT-2
σ L)/
(σT+
2σL)
PT (GeV)
LO ϒ+ bb NLO NNLO★
Þ Complete modification of the polarisation at NLO (also at NNLO?)
Þ Yield from kT factorisation is also longitudinal (in the helicity frame)
Þ This is not yet explained by simple arguments(although reasonable)
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 9 / 17
QCD corrections do matter for the polarisation
Υ & ψ polarisation in hadroproduction at O(α4S) & O(α5
S)
P.Artoisenet, J.Campbell, JPL, F.Maltoni, F. Tramontano, Phys. Rev. Lett. 101,152001,2008B. Gong, J.X Wang, Phys. Rev. Lett. 100,232001,2008.
JPL, EPJC 61,693,2009.JPL, arXiv:1003.4319 [hep-ph]
-1
-0.5
0
0.5
1
0 1 2 3 4 5
α=(σ
T-2
σ L)/
(σT+
2σL)
PT (GeV)
helicity frame (|y|<0.35)
NLO from gq+gg LO from gg
-1
-0.5
0
0.5
1
1.5
2
2.5
5 10 15 20 25 30 35 40 45 50
α =
(σT-2
σ L)/
(σT+
2σL)
PT (GeV)
Direct ψ(2S) CDF data at s1/2=1.96 TeVLO NLO NNLO★
-1
-0.5
0
0.5
1
10 15 20 25 30 35 40 45 50
α =
(σT-2
σ L)/
(σT+
2σL)
PT (GeV)
LO ϒ+ bb NLO NNLO★
Þ Complete modification of the polarisation at NLO (also at NNLO?)
Þ Yield from kT factorisation is also longitudinal (in the helicity frame)
Þ This is not yet explained by simple arguments(although reasonable)
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 9 / 17
Part III
what we do not understand
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 10 / 17
ψ production at very large PT
ψ production at very large PT
1e-06
1e-05
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30
dσ /d
PT| |y
|<0.
6 x
Br
(nb
/GeV
)
PT (GeV)
ψ(2S) productionat sqrt(s)=1.96 TeV
scale and mass uncertainties combined in quadrature
for NNLO* curves:
mc2 < sij
min< 4 mc2
LONLO
NNLO*CDF data
Could simply be the colour octets (3S[8]1 )
What about the polarisation measurement, then ?
(GeV/c)TP5 10 15 20 25 30
α
-1-0.8-0.6-0.4-0.2
00.20.40.60.8
1
CDF DataNRQCD
Psi(2S)
Could be the data ...Let’s wait for the LHC data for prompt ψ(2S) or direct J/ψ
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 11 / 17
ψ production at very large PT
ψ production at very large PT
1e-06
1e-05
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30
dσ /d
PT| |y
|<0.
6 x
Br
(nb
/GeV
)
PT (GeV)
ψ(2S) productionat sqrt(s)=1.96 TeV
scale and mass uncertainties combined in quadrature
for NNLO* curves:
mc2 < sij
min< 4 mc2
LONLO
NNLO*CDF data
Could simply be the colour octets (3S[8]1 )
What about the polarisation measurement, then ?
(GeV/c)TP5 10 15 20 25 30
α
-1-0.8-0.6-0.4-0.2
00.20.40.60.8
1
CDF DataNRQCD
Psi(2S)
Could be the data ...Let’s wait for the LHC data for prompt ψ(2S) or direct J/ψ
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 11 / 17
ψ production at very large PT
ψ production at very large PT
1e-06
1e-05
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30
dσ /d
PT| |y
|<0.
6 x
Br
(nb
/GeV
)
PT (GeV)
ψ(2S) productionat sqrt(s)=1.96 TeV
scale and mass uncertainties combined in quadrature
for NNLO* curves:
mc2 < sij
min< 4 mc2
LONLO
NNLO*CDF data
Could simply be the colour octets (3S[8]1 )
What about the polarisation measurement, then ?
(GeV/c)TP5 10 15 20 25 30
α
-1-0.8-0.6-0.4-0.2
00.20.40.60.8
1
CDF DataNRQCD
Psi(2S)
Could be the data ...Let’s wait for the LHC data for prompt ψ(2S) or direct J/ψ
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 11 / 17
ψ production at very large PT
ψ production at very large PT
1e-06
1e-05
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30
dσ /d
PT| |y
|<0.
6 x
Br
(nb
/GeV
)
PT (GeV)
ψ(2S) productionat sqrt(s)=1.96 TeV
scale and mass uncertainties combined in quadrature
for NNLO* curves:
mc2 < sij
min< 4 mc2
LONLO
NNLO*CDF data
Could simply be the colour octets (3S[8]1 )
What about the polarisation measurement, then ?
(GeV/c)TP5 10 15 20 25 30
α
-1-0.8-0.6-0.4-0.2
00.20.40.60.8
1
CDF DataNRQCD
Psi(2S)
Could be the data ...
Let’s wait for the LHC data for prompt ψ(2S) or direct J/ψ
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 11 / 17
ψ production at very large PT
ψ production at very large PT
1e-06
1e-05
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30
dσ /d
PT| |y
|<0.
6 x
Br
(nb
/GeV
)
PT (GeV)
ψ(2S) productionat sqrt(s)=1.96 TeV
scale and mass uncertainties combined in quadrature
for NNLO* curves:
mc2 < sij
min< 4 mc2
LONLO
NNLO*CDF data
Could simply be the colour octets (3S[8]1 )
What about the polarisation measurement, then ?
(GeV/c)TP5 10 15 20 25 30
α
-1-0.8-0.6-0.4-0.2
00.20.40.60.8
1
CDF DataNRQCD
Psi(2S)
Could be the data ...Let’s wait for the LHC data for prompt ψ(2S) or direct J/ψ
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 11 / 17
Part IV
what we expect from the LHC:
new measurements
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 12 / 17
Part IV
what we expect from the LHC: new measurements
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 12 / 17
More observables !
New observables
J/ψ+ hadron azimuthal correlations STAR Collab., Phys.Rev.C80:041902 (R),2009.
PYTHIA might not be reliable ( Color Singlet at LO: gg → J/ψg)Need for updates with NLO and NNLO? (gg → J/ψgg , gg → J/ψggg)
J/ψ + D or J/ψ+lepton: peak at ∆φ = π in the yield integrated over PTS. J. Brodsky and JPL, PRD 81 051502 (R), 2010
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Besides, the rapiditydependence givesinfo on c(x)plot for RHIC kinematics
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 13 / 17
More observables !
New observables
J/ψ+ hadron azimuthal correlations STAR Collab., Phys.Rev.C80:041902 (R),2009.
PYTHIA might not be reliable ( Color Singlet at LO: gg → J/ψg)
Need for updates with NLO and NNLO? (gg → J/ψgg , gg → J/ψggg)
J/ψ + D or J/ψ+lepton: peak at ∆φ = π in the yield integrated over PTS. J. Brodsky and JPL, PRD 81 051502 (R), 2010
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Besides, the rapiditydependence givesinfo on c(x)plot for RHIC kinematics
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 13 / 17
More observables !
New observables
J/ψ+ hadron azimuthal correlations STAR Collab., Phys.Rev.C80:041902 (R),2009.
PYTHIA might not be reliable ( Color Singlet at LO: gg → J/ψg)Need for updates with NLO and NNLO? (gg → J/ψgg , gg → J/ψggg)
J/ψ + D or J/ψ+lepton: peak at ∆φ = π in the yield integrated over PTS. J. Brodsky and JPL, PRD 81 051502 (R), 2010
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Besides, the rapiditydependence givesinfo on c(x)plot for RHIC kinematics
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 13 / 17
More observables !
New observables
J/ψ+ hadron azimuthal correlations STAR Collab., Phys.Rev.C80:041902 (R),2009.
PYTHIA might not be reliable ( Color Singlet at LO: gg → J/ψg)Need for updates with NLO and NNLO? (gg → J/ψgg , gg → J/ψggg)
J/ψ + D or J/ψ+lepton: peak at ∆φ = π in the yield integrated over PTS. J. Brodsky and JPL, PRD 81 051502 (R), 2010
0
10
20
30
40
50
0 1 2 3
N(J
/ψ+
c) /
N(J
/ψ+
X)
(%
)
yNo IC
BHPSSea-like
Besides, the rapiditydependence givesinfo on c(x)plot for RHIC kinematics
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 13 / 17
More observables !
New observables
J/ψ + γ
CS rate at NLO ' conservative (high) expectation from COR.Li and J.X. Wang, PLB 672:51,2009
A priori, no real new info on the relative importance of CS vs COBut...
JPL, PLB 679:340,2009.
J/ψ + cc , Υ + bb
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 14 / 17
More observables !
New observables
J/ψ + γ
CS rate at NLO ' conservative (high) expectation from COR.Li and J.X. Wang, PLB 672:51,2009
A priori, no real new info on the relative importance of CS vs COBut...
JPL, PLB 679:340,2009.
J/ψ + cc , Υ + bb
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 14 / 17
More observables !
New observables
J/ψ + γ
CS rate at NLO ' conservative (high) expectation from COR.Li and J.X. Wang, PLB 672:51,2009
A priori, no real new info on the relative importance of CS vs CO
But...
JPL, PLB 679:340,2009.
J/ψ + cc , Υ + bb
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 14 / 17
More observables !
New observables
J/ψ + γ
CS rate at NLO ' conservative (high) expectation from COR.Li and J.X. Wang, PLB 672:51,2009
A priori, no real new info on the relative importance of CS vs COBut...
JPL, PLB 679:340,2009.
J/ψ + cc , Υ + bb
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 14 / 17
More observables !
New observables
J/ψ + γ
CS rate at NLO ' conservative (high) expectation from COR.Li and J.X. Wang, PLB 672:51,2009
A priori, no real new info on the relative importance of CS vs COBut...
JPL, PLB 679:340,2009.
J/ψ + cc , Υ + bb
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 14 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decay
planned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decayplanned by LHC-b
allow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decayplanned by LHC-ballow to study hc as well as ψ
maybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
More observables !
New observables
Polarisation
of direct yields of Υ(3S), then others
polarisation of the χQ (angular dependence of the γ)
rapidity dependence of the polarisation
φ angular dependence of the leptonic decay
polarisation in different frames
J/ψ + J/ψ, J/ψ + Υsee C. Yu’s talk during the first session
strong sensitivity on the CO LDME 3S[8]1
would help to understand large PT inclusive production
Quarkonium studies via pp decayplanned by LHC-ballow to study hc as well as ψmaybe different acceptances, nice cross check
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 15 / 17
Part V
Conclusions and Outlooks
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 16 / 17
Conclusions and Outlooks
LO pQCD (CSM) fails as far as dσ/dPT is concerned
Yet, the LO (and NLO) CSM reproduces the yield:relevant for heavy-ion studies !
Agrees with the strong reduction of CO contributions at low/mid PT
expected from e+e− analyses
Moreover, QCD-corrections bring agreements for dσ/dPT in
γp for J/ψ M.Kramer Nucl.Phys.B459:3 1996
pp for Υ (Tevatron) P.Artoisenet, J.Campbell, JPL,et al.PRL101, 152001 (2008)
pp for ψ (RHIC, Tevatron) (gap at large PT )P.Artoisenet, AIP PC 1038,55,2008.
JPL, EPJC 61:693,2009JPL arXiv:1003.4319 [hep-ph]
Drawback: large theoretical uncertainties. . .
The time has come for another look with new observablesat the LHC or elsewhere !
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 17 / 17
Conclusions and Outlooks
LO pQCD (CSM) fails as far as dσ/dPT is concerned
Yet, the LO (and NLO) CSM reproduces the yield:relevant for heavy-ion studies !
Agrees with the strong reduction of CO contributions at low/mid PT
expected from e+e− analyses
Moreover, QCD-corrections bring agreements for dσ/dPT in
γp for J/ψ M.Kramer Nucl.Phys.B459:3 1996
pp for Υ (Tevatron) P.Artoisenet, J.Campbell, JPL,et al.PRL101, 152001 (2008)
pp for ψ (RHIC, Tevatron) (gap at large PT )P.Artoisenet, AIP PC 1038,55,2008.
JPL, EPJC 61:693,2009JPL arXiv:1003.4319 [hep-ph]
Drawback: large theoretical uncertainties. . .
The time has come for another look with new observablesat the LHC or elsewhere !
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 17 / 17
Conclusions and Outlooks
LO pQCD (CSM) fails as far as dσ/dPT is concerned
Yet, the LO (and NLO) CSM reproduces the yield:relevant for heavy-ion studies !
Agrees with the strong reduction of CO contributions at low/mid PT
expected from e+e− analyses
Moreover, QCD-corrections bring agreements for dσ/dPT in
γp for J/ψ M.Kramer Nucl.Phys.B459:3 1996
pp for Υ (Tevatron) P.Artoisenet, J.Campbell, JPL,et al.PRL101, 152001 (2008)
pp for ψ (RHIC, Tevatron) (gap at large PT )P.Artoisenet, AIP PC 1038,55,2008.
JPL, EPJC 61:693,2009JPL arXiv:1003.4319 [hep-ph]
Drawback: large theoretical uncertainties. . .
The time has come for another look with new observablesat the LHC or elsewhere !
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 17 / 17
Conclusions and Outlooks
LO pQCD (CSM) fails as far as dσ/dPT is concerned
Yet, the LO (and NLO) CSM reproduces the yield:relevant for heavy-ion studies !
Agrees with the strong reduction of CO contributions at low/mid PT
expected from e+e− analyses
Moreover, QCD-corrections bring agreements for dσ/dPT in
γp for J/ψ M.Kramer Nucl.Phys.B459:3 1996
pp for Υ (Tevatron) P.Artoisenet, J.Campbell, JPL,et al.PRL101, 152001 (2008)
pp for ψ (RHIC, Tevatron) (gap at large PT )P.Artoisenet, AIP PC 1038,55,2008.
JPL, EPJC 61:693,2009JPL arXiv:1003.4319 [hep-ph]
Drawback: large theoretical uncertainties. . .
The time has come for another look with new observablesat the LHC or elsewhere !
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 17 / 17
Conclusions and Outlooks
LO pQCD (CSM) fails as far as dσ/dPT is concerned
Yet, the LO (and NLO) CSM reproduces the yield:relevant for heavy-ion studies !
Agrees with the strong reduction of CO contributions at low/mid PT
expected from e+e− analyses
Moreover, QCD-corrections bring agreements for dσ/dPT in
γp for J/ψ M.Kramer Nucl.Phys.B459:3 1996
pp for Υ (Tevatron) P.Artoisenet, J.Campbell, JPL,et al.PRL101, 152001 (2008)
pp for ψ (RHIC, Tevatron) (gap at large PT )P.Artoisenet, AIP PC 1038,55,2008.
JPL, EPJC 61:693,2009JPL arXiv:1003.4319 [hep-ph]
Drawback: large theoretical uncertainties. . .
The time has come for another look with new observablesat the LHC or elsewhere !
J.P. Lansberg (Ecole Polytechnique–CPHT) Quarkonium production at the LHC July 22, 2010 17 / 17