Interconnection between Particle Physics and Cosmology at...
Transcript of Interconnection between Particle Physics and Cosmology at...
Interconnection betweenParticle Physics and Cosmology
at the LHC
© Premiere Props
Selections from the “Cosmo Secret” Cube Catalogue“Standard Model” Cube “PPC” Cube“Transformer” Cube
Teruki KamonMitchell Institute for Fundamental Physics and Astronomy
Texas A&M University&
WCU Collider Physics ResearchKyungpook National University
KPS MeetingBusan, Republic of Korea
October 19th , 2011
1PPC at the LHC
SummaryOUTLINE3
1) Where? … LHC & Detectors2) Why? … Dark Matter and SUSY3) How? … SUSY Searches
PrologueIt has been 13.8 B years, sincethe LHC machine was set up. Themachine finally started providingproton-proton collisions at acenter-of-mass energy of 7 TeVon March 30, 2010 and becamethe energy frontier machine tolead discoveries of new particles.The Standard Model (SM) iscurrently well tested up to ~100GeV, but is expected to breakdown in the TeV domain wherenew physics should occur. This isprecisely the domain that we willstudy at the LHC.
Teruki Kamon 2PPC at the LHC
LHC at CERN
27 km ring
Teruki Kamon 3PPC at the LHC
Ingredients for Particle Physics with DM Candidate1) Solution for a structural defect in the Higgs sector2) Grand Unification3) …4) Dark matter candidate … A key to interconnection between
particle physics and cosmology
New Physics at the LHC?1) Supersymmetry (SUSY)?2) Universal Extra Dimension (UED)?3) Littlest Higgs with T parity (LHT)?4) …
Physics with Dark Matter
Teruki Kamon 4PPC at the LHC
… Supersymmetrized Standard Model(“democratic” solution between Fermionsand Bosons) where MSUSY is at TeV scalefor three aspects.
An elegant solution to solve the problemassociated with the Higgs mass
+
Beautifully connecting the Standard Modelwith an ultimate unification of the fundamentalinteractions
Cosmologically consistent with the lightestneutralino ( ) as dark matter candidate0
1χ~
Teruki Kamon PPC at the LHC 5
The LHC is the machine to probe the TeVscale.
~0.0000001 seconds
Now
CMB
annihilation
combination
LHC
http://www.damtp.cam.ac.uk/user/gr/public/bb_history.html
Dark Matter and SUSY
Probing 10-7 sec. after Big Bang
Teruki Kamon 6PPC at the LHC
“Number” density (n) Ω
2 hΩ10.
Dark Matter Content
masses) (SUSY201
D=h~χΩ
]Mpcskm 100[ 11 −−⋅≡ /Hh
( ) 3 22eqnnHn
dtdn
−⋅−−= vσ
Co-annihilation (CA) Process (Griest, Seckel ’91)
Cross section (σ)
SUSY Masses (at the LHC)
Teruki Kamon PPC at the LHC 7
Elegant(?) SUSY World
Teruki Kamon PPC at the LHC 8
MSSM – more than 100 parameters
Impossible to have more than 100measurements at the LHC
Let’s consider a way to test aminimal scenario, first. Then,expand to non-minimal scenarios.
Minimal scenario = mSUGRA
SUSY Philosophy
Manyparameters
Fewparameters
)tan(masses) (SUSY 01/202
01
A,,m,mh~ βΩχ
DD ==
Teruki Kamon PPC at the LHC 9
Probe Metric at the LHC
Minimal SUGRA
Non-Universal SUGRA
),tan,,( 01/202
~01
Ammh βχ
D=Ω
),,tan,,( 01/202
~01
µβχ
Ammh D=Ω
Future Collider
E
LHC
Tevatron
Precision
We test “mSUGRA” cases first, followedby a “non-universal SUGRA” case.
Teruki Kamon PPC at the LHC 10
Very simplified diagram
Higgs Slepton Gluino &Squark
Neutralino& Chargino
Teruki Kamon 11PPC at the LHC
SUSY with Universality
Universality
Four parameters plus one sign:
m1/2 = common mass for “spin ½” particles at MGUTm0 = common mass for “spin 0” particles at MGUTand tanb , A0 , sign of m
So the dark matter content can beexpressed as:
)tan(masses) (SUSY 01/202
01
A,,m,mh~ βΩχ
DD ==
1) MHiggs > 114 GeV2) Mchargino > 104 GeV3) 2.2x10−4 <Br(b→s γ) <4.5x10−4
4) (g−2)µ : 3 σ deviation from SM5) 12101060 2
01
.h. ~ <<χ
Ω
(spin ½)
(spin 0)
Allowed Region
CDM allowed region?
Magnetic Moment of Muon
Higgs Mass (Mh)
Branching Ratio b → sγ
Excl
uded
Mas
s of
Squ
arks
and
Sle
pton
s
Mass of Gauginosm1/2
m0
Teruki Kamon 12PPC at the LHC
Cosmologically Allowed Region
CDM allowed region
Magnetic Moment of Muon
Higgs Mass (Mh)
Branching Ratio b → sγ
Excl
uded
Mas
s of
Squ
arks
and
Sle
pton
s
Mass of Gauginosm1/2
m0
What are the signals from the narrow co-annihilation corridor?
Teruki Kamon 13PPC at the LHC
Co-annihilation (CA) Process (Griest, Seckel ’91)
Excluded by1) Rare B decay b → sγ2) No CDM candidate3) Muon magnetic moment
abc
CDMS II
Rouzbeh Allahverdi, Bhaskar Dutta, Yudi SantosoarXiv:0912.4329
Stau - neutralino co-annihilation scenario (e.g., Arnowitt, Dutta, Gurrola, Kamon, Krislock, Toback, PRL100 (2008) 231802)
“Cube” Approach
Teruki Kamon 14PPC at the LHC
Develop technique(s)
a) To extract key final states;b) To measure SUSY masses in a minimal framework;c) To determine model parameters;d) To extract Ω (amount of the dark matter) at
the LHC;e) To expand to non-minimal scenarios;f) To expand to non-SUSY scenarios (e.g., UED);
and carry out at ATLAS and CMS!
Today’s Focus: Missing ET + Jets Final States
PPC ProjectsExperiment-Theory (ET) Collaboration
ΩSUSY ≟ ΩDM
Teruki Kamon 15PPC at the LHC
Identify smoking-gun signal(s) and kinematical variables in a minimal benchmark model.
Prepare kinematical templates by changing one mass at a time.
01χ~
p
Ω ≟ 0.23
Ω ≠ 0.23Ω = 0.23
Approach
Teruki Kamon 16PPC at the LHC
50 fb−1
10 fb−1
%~hh 52
2
ΩΩδ
non-minimal case(s)
(a)Measure SUSY masses(b)Determine the benchmark model
parameter
PRL100 (2008) 231802
PRD 82 (2010) 115009
Phys. Lett. B 505 (2001) 161 (Tevatron)Phys. Lett. B 538 (2002) 121 (Tevatron)Phys. Lett. B 611 (2005) 223 (ILC)Phys. Lett. B 618 (2005) 182 (ILC)
Eur. Phys. J. C46 (2006) 43 (LHC+ILC) “ Supersymmetry Parameter Analysis: SPA Convention and Project ”
Phys. Lett. B 639 (2006) 46 (LHC)Phys. Lett. B 649 (2007) 73 (LHC)Phys. Rev. Lett. 100 (2008) 231802 (LHC)Phys. Rev. D 79 (2009) 055002 (LHC) Phys. Rev. D 82 (2010) 115009 (LHC)Phys. Lett. B 703 (2011) 475 (“BEST” at LHC)
PPC Projects at A Glancehttp://faculty.physics.tamu.edu/kamon/research/TEVpheno/http://faculty.physics.tamu.edu/kamon/research/ILCpheno/http://faculty.physics.tamu.edu/kamon/research/LHCpheno/
Teruki Kamon 17PPC at the LHC
[General conclusion] Lots ofdata are needed tocalculate the dark mattercontent. We first findsmoking gun signal(s) inearly stage of the LHC.
1
23
Case1: Bs µµ
Teruki Kamon 18PPC at the LHC
Our PPC phenomenology paper [Phys.Lett. B 538 (2002) 121], followedby CDF papers.
July 2011
Prospects for Bs µµCMS LHCb
CMS+LHCb: Interesting to see the results fromthe entire 2011 data.
CDF: See Prof. Satoru Uozumi’s talk.
Teruki Kamon 19PPC at the LHC
Summer resultSummer result
Finding Smoking Gun(s)
Case 2: MET + Jets + Taus
Teruki Kamon 20PPC at the LHC
Phys. Lett. B 639 (2006) 46Phys. Lett. B 649 (2007) 73Phys. Rev. Lett. 100 (2008) 231802
( )( )( )( )( )( )( )( )( )( )bbcscsu
bbcscsu
bbWWu
btu
bbugupp R
) ( ) ~( ~ ) ( ) ~( ~
)( )~( ~ )~( ~
~ ~~ ~
01
01
101
02
01
201
201
−+
−+
−+
+
→
→
→
→
→→
ττχχ
ττχ
χχ
χχ
χ
γγπππνρτ τ+−−− →→→ 0
)(6 τJ4,3 JJ
1J
µ,2J
5J 7J
1J
2J 5J7J
4J
3J)(6 τJ
ηϕ
pT η φ MC Truth
J1 253.3 -1.550 -2.864 u (pT= 229.0 GeV)
J2 126.5 -1.072 2.678 Rad. b (pT= 79.9 GeV) + others
J3 100.4 -0.238 -2.251 s (pT= 96.7 GeV)
J4 92.1 0.499 -2.180 cbar (pT= 93.9 GeV)
J5 81.3 0.098 2.113 b (pT= 79.5 GeV)
J6 68.6 0.031 -1.587 τ− (pT= 144 GeV)
J7 34.6 1.076 1.012 Rad. s (pT= 30.6 GeV)
µ+ 5.9 0.2 2.4 τ+ (pT= 15.6 GeV)µ+ (pT= 5.85 GeV)
Looks like this …
Teruki Kamon 22PPC at the LHC
CMS has:
1) An excellent tracking system with goodcalorimeter and muon systems.
2) A powerful Particle-Flow algorithm in place.
3) A robust tau ID in large PU and large jetmultiplicity environments.
This allows us to develop an analysis tool toextract signal in jets + MET final state:
See Dr. Jieun Kim’s talk on CMS data …
Teruki Kamon 23PPC at the LHC
%%~~%%~%.%~W~
99929858
4242SSCU-Non
102
1
011
ττχτνχχ
→
→ ±±
mSUGRANon-U
Next page
Case 3: MET + Jets + W(s)Phys. Rev. D 82 (2010) 115009 (LHC)Phys. Lett. B 703 (2011) 475 (“BEST” at LHC)
The W rate is enhanced.
jbWbWjttpp )( )( +→+→ −+
jj ν−ljjjjWpp +→
ν−l
Detection of WjjBi-Event Subtraction Technique
− =
BEST: “jet” mixingfrom two different events
(TTbar, TTbar), (TTbar,W), (W,W)
Teruki Kamon 24PPC at the LHC
Phys. Lett. B 703 (2011)
BEST in TTbar
mjj mbW
Top massW mass
Good agreement
Teruki Kamon 25PPC at the LHC
Potential Applications
Teruki Kamon 26PPC at the LHC
Future BEST in SUSY
mjWmjj
? ?
Teruki Kamon 27PPC at the LHC
PPC Projects
LHC: Experiment-Theory (ET) Collaboration
Teruki Kamon 28PPC at the LHC
Interconnection between Particle Physics and Cosmology
PPC 2011 at CERN, June 14-18PPC 2012 at ???
About “PPC” Cube
PPC CubeTeruki Kamon 29PPC at the LHC
TAMU U. of New Mexico U. of Oklahoma Torino/INFN
CSI: Cosmologyat the LHC
Collider Scene Investigation
Summary
LHC – keep going!
1) Cosmologically Consistent Collider (C3) signals at LHC2) Dark matter detection at CDMS II, XENON100, KIMS, …3) Dark matter annihilation signals at FERMI LAT, AMS2, …
Teruki Kamon 30PPC at the LHC