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


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


… 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


“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)


Elegant(?) SUSY World


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 ==


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.


Very simplified diagram

Higgs Slepton Gluino &Squark

Neutralino& Chargino


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


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?


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


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


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


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/


[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


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.


Summer resultSummer result

Finding Smoking Gun(s)

Case 2: MET + Jets + Taus


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 …


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 …


%%~~%%~%.%~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)


Phys. Lett. B 703 (2011)

BEST in TTbar

mjj mbW

Top massW mass

Good agreement


Potential Applications


Future BEST in SUSY

mjWmjj

? ?


PPC Projects

LHC: Experiment-Theory (ET) Collaboration


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, …


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