Mikhail Bashkanov
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Transcript of Mikhail Bashkanov
Two-pion program at WASA
Mikhail BashkanovNew Results on the ABC-Resonance Structure
Wasa-at-COSY1Content2Two-pion production3N*DDDN*sDD(1600)Tp < 1.5 GeVExpectations in total cross section
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ABC resonance70 MeVTotal cross section pn d00 P. Adlarson et. al Phys. Rev. Lett. 106:242302, 2011NN*(1440)6
Angular distribution in the peak
J=1J=3Quantum numbers of the structureAntisymmetrization: Jp=1+or 3+ : if L=0
pn d* d 00 pn d 00I=0,1I=0I=0,2I=01+3+
1+ excluded by ().3+ assigned 78
t-channel ABC effectM for different energies9Status of Theoretical Descriptionpn R DD dp0p0
dpnI(Jp) = 0(3+)Isospin relations10I=0I=111Total cross section pN d P. Adlarson et. al Phys. Lett. B721 (2013) 229
12M in pN d
13M in pN d
14M in pN d
Isospin violation
15+-00Non-fusion channel1617
pn pp-0ABC expectedPreliminaryConventional processConventional process +ABCPrediction for the open channels18
M. Albaladejo, E. Oset nucl-th:1304.7698Elastic channel19Kinematics
20Proton spectatorprotonneutrondpnp + psp213+ Resonance in npnpL=2npL=4pnnp22Total pn cross-section
SAIDDevlin et al, PRD8, 136 (73) LisowskI et al, PRL49, 255(82)23
Expectationspnnp
SAIDSAID with resonance
24Expectationpnnp
SAID
25Realitypnnp
SAID
26pn Vector Analysing Power
SAIDVery PreliminaryConclusion27Thank you
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SAID
Beam polarization0Polarization 2Polarization 1
35pn Vector Analysing Power
SAIDVery Preliminary
Isospin DecompositionSkorodko at al., Phys. Lett. B679 (2009) 30
N*(1440)[(1600)]
Beam polarization0Polarization 2Polarization 1
38Total cross section pp d+0 Shimizu et al.F. Kren et al.
39Total cross section pn d00
40Total cross section pn d+-
41Total cross section pn d+- 42M in pN d
43M in pN d
44M in pN d
Isospin violation
45+-00