Theoretical particle physics in China and France

QCD, bound states, and the physics beyond the SM

Michael KlasenLPSC Grenoble

January 15, 2008

January 15, 2008 Michael Klasen, LPSC Grenoble 2

Theoretical particle physics in France

Annecy (LAPP/LAPTH): ATLAS, CMS, LHC-BHeavy ions, jets, photons, SUSY (Aurenche, Belanger, Boudjema, Guillet, Mühlleitner, Pilon, Salati)

Clermont-Fd. (LPC): ALICE, ATLAS, LHC-BB mesons (Morenas)

Grenoble (LPSC): ALICE, ATLASDiffraction, jets, photons, heavy quarks, SUSY, GUTs (Carbonell, MK, Kraml, Richard, Schienbein)

Lyon (IPN): ALICE, CMSB mesons, little Higgs, SUSY (Deandrea)

Marseille (CPPM/CPT): ATLAS, LHC-BDiffraction, B mesons (Charles, Knecht, Lellouch, Soffer)

Montpellier (LPTA): -Heavy quarks, SUSY (Hugonie, Kneur, Moultaka, Narison, Renard)

Nantes (SUBATECH): ALICEHeavy ions (Werner)

Paris (LPNHE/LPTHE/LPTENS Jussieu/Veme): ATLASDiffraction, heavy quarks, SUSY (Cacciari, Dokshitzer, Fayet, Nicolescu, Salam)

Paris (IPN/LAL/LLR/LPT/CPhT Orsay/Palaiseau): ALICE, ATLAS, CMS, LHC-BHeavy ions, diffraction, jets, photons, Higgs, SUSY, X-dimensions(Djouadi, Ellwanger, Fontannaz, Korchemsky, Moreau, Munier, Pire, Schiff, Wallon)

Paris (DAPNIA/SPhT Saclay): ALICE, ATLAS, CMSHeavy ions, diffraction, jets, photons, X-dimensions (Gelis, Kosower, Peschanski, Savoy, Servant)

January 15, 2008 Michael Klasen, LPSC Grenoble 3

ESRF

ILLLPSC

CERN /Fréjus

January 15, 2008 Michael Klasen, LPSC Grenoble 4

Theoretical particle physics in France

Annecy (LAPP/LAPTH): ATLAS, CMS, LHC-BHeavy ions, jets, photons, SUSY (Aurenche, Belanger, Boudjema, Guillet, Mühlleitner, Pilon, Salati)

Clermont-Fd. (LPC): ALICE, ATLAS, LHC-BB mesons (Morenas)

Grenoble (LPSC): ALICE, ATLASDiffraction, jets, photons, heavy quarks, SUSY, GUTs (Carbonell, MK, Kraml, Richard, Schienbein)

Lyon (IPN): ALICE, CMSB mesons, little Higgs, SUSY (Deandrea)

Marseille (CPPM/CPT): ATLAS, LHC-BDiffraction, B mesons (Charles, Knecht, Lellouch, Soffer)

Montpellier (LPTA): -Heavy quarks, SUSY (Hugonie, Kneur, Moultaka, Narison, Renard)

Nantes (SUBATECH): ALICEHeavy ions (Werner)

Paris (LPNHE/LPTHE/LPTENS Jussieu/Veme): ATLASDiffraction, heavy quarks, SUSY (Cacciari, Dokshitzer, Fayet, Nicolescu, Salam)

Paris (IPN/LAL/LLR/LPT/CPhT Orsay/Palaiseau): ALICE, ATLAS, CMS, LHC-BHeavy ions, diffraction, jets, photons, Higgs, SUSY, X-dimensions(Djouadi, Ellwanger, Fontannaz, Korchemsky, Moreau, Munier, Pire, Schiff, Wallon)

Paris (DAPNIA/SPhT Saclay): ALICE, ATLAS, CMSHeavy ions, diffraction, jets, photons, X-dimensions (Gelis, Kosower, Peschanski, Savoy, Servant)

January 15, 2008 Michael Klasen, LPSC Grenoble 5

Outline

Exotic hadronsIHEP, ITP, Peking UniversityLPSC Grenoble, LPTA Montpellier

Higgs bosons and supersymmetryTsinghua UniversityLPT Orsay

Precise predictions for BSM at collidersPeking UniversityLPSC Grenoble

Charm at BES-III and CKM-FitterIHEPLAPP Annecy, CPT Marseille, LPT Orsay

Top quarks and Higgs bosonsShandong UniversityLPSC Grenoble

Cosmic rays and dark matterIHEPLAPP Annecy, LPNHE Jussieu

January 15, 2008 Michael Klasen, LPSC Grenoble 6

Charm quarks at BES-III & CKM-Fitter (1)

Experiment:BES-III

Physics interests:Leptonic D(s) decays decay constant @ 1-2 % lattice, B-decaysSemileptonic D decays Vcs, Vcd, Q2-dependence of form factorsThreshold production of D pairs D0-D0 mixing

China:IHEP: H.B. Li, Z.Z. Xing

France:LAPP Annecy: S. T’Jampens, C. KaufholdCPT Marseille: J. CharlesLPT Orsay: S. Descotes-Genon

Chapter of BES-III physics book (04/07), visit to IHEP (11/07)Proposal for 2008:

2 visits China France, 4 visits France China

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January 15, 2008 Michael Klasen, LPSC Grenoble 7

Charm quarks at BES-III & CKM-Fitter (2)

Charm 2007 Workshop:

BES-III expectations:

January 15, 2008 Michael Klasen, LPSC Grenoble 8

Exotic hadrons (1)Theoretical aspects:

Multiflavored [Bc], hidden charm [X(3872)], additional light hadronsSpectroscopy, production rates, and decay propertiesConstituent quark models, QCD sum rules, and effective theories

Experiments:BaBar, Belle, BES-III, CLEOc, COMPASS, FAIR, J-PARC, and LHC

China:IHEP: Q.Zhao, Y.Chen, Y.B.Dong, Y.Jia, P.N.Shen, J.X.Wang, B.S.ZouPeking University: S.L. Zhu, K.T. Chao, C. Liu, B.Q. Ma, H.Q. ZhengCAS: J.P. Ma (ITP), C.F. Qiao (graduate school)

France:LPSC Grenoble: J.M. RichardLPTA Montpellier: S. Narison

Visit by Q. Zhao to LPSC Grenoble (01/08)Proposal for 2008:

2 visits China France, 2 visits France China

January 15, 2008 Michael Klasen, LPSC Grenoble 9

Exotic hadrons (2)Pentaquark: uudds (†)Baryons: cqq (B-factories)

BaBar M=2940, ≈17 MeVPotential models:

3-body dynamics ?Baryons: ccq (Selex 3520 ?)

NRQCDDiquarks (too many states)

Baryons: ccc (“Ultimate goal”)

Mesons: ccg-hybridsBO appr./class. const. gluonsBelle X(3941) a 1-+ candidate

Mesons: MultiquarksPotential models:

c,b:q:Flavour-spin:

QCD sum rules:Duality of 2-point corr. fct.X(3872): ccqq @ 3925±127

Lattice QCD: Z.F. LiuResonance or artefact ?Complex energy scaling

January 15, 2008 Michael Klasen, LPSC Grenoble 10

Top quarks & Higgs bosons (1)Experiment:

ATLASPhysics interests:

Top quark: Identification/reconstruction, single top productionHiggs bosons: h0 W+W-, H±

LHC computing gridChina:

Shandong University: Z. Ren, …, Z.T. Liang, Z.G. SiFrance:

LPSC Grenoble: F. Malek, …, MK

Proposal for 2008:3 visits China France3 visits France China

January 15, 2008 Michael Klasen, LPSC Grenoble 11

Top quarks & Higgs bosons (2)Production of top quarks: non-polarized, but spins correlated

Tevatron (qLqR tt) : 81% opposite spins

LHC (gg tt) : 67% identical helicities

Decay ( single production): rest frame of top quarkNo hadronization spin conserved

Weak decay spin transfer

Analyzing power i = 1 (l,d) / -0.31 (,u) / -0.41 (b)

Double-differential distribution C = fraction of top quarks with identical spin

Choice of basis:Beam axis: Simple, symmetric, frame independentTevatron: off-diagonal, ,LHC: Top helicity (or eigenvector of C)

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January 15, 2008 Michael Klasen, LPSC Grenoble 12

Higgs bosons & supersymmetry (1)Theoretical aspects:

New models for EWSB, properties of Higgs/SUSY particlesProduction and decay of Higgs/SUSY particles at LHC/ILCDirect and indirect detection of SUSY dark matter

Experiments:ATLAS, CMS, but also low-energy/astrophysics constraints

China:Tsinghua University: H.J. He

France:LPT Orsay: A. Djouadi

Proposal for 2008:1 or 2 visits China France1 or 2 visits France China

January 15, 2008 Michael Klasen, LPSC Grenoble 13

Higgs bosons & supersymmetry (2)

Higgs production and decay in warped extra dimensions:A. Djouadi, G. Moreau, arXiv:0707.3800 [hep-ph]SU(2)L x SU(2)R x U(1) with additional heavy b-quark

Contributes to production and decay

R = RS/SM < 1.2, < 2, < 4, > 4

January 15, 2008 Michael Klasen, LPSC Grenoble 14

Higgs bosons & supersymmetry (3)New gauge boson production in Higgs-less models:

H.J. He, Y.P. Kuang et al., arXiv:0708.2588 [hep-ph]De-constructed 5th

dimension with 3 sites: SU(2)0 x SU(2)1 x U(1)2

Spontaneous symmetry breaking W1/Z1 bosons with MW1/Z1 400 GeV

Delays unitarity violation to higher scales choose MW1

(= 500 GeV) and f1/f2 (= 1)

pp W0 Z0 Z0 pp W0 Z0 j j

January 15, 2008 Michael Klasen, LPSC Grenoble 15

Precise predictions for BSM at colliders (1)

Theoretical aspects:Higgs, supersymmetry, extra neutral gauge bosons, …Perturbative QCD, resummation, Monte Carlo simulation leptons: NLSP, b- unification, non-universality, FCNC

Experiments:ATLAS, CMS, but also low-energy/astrophysics constraints

China:Peking University: C.S. Li, S.H. Zhu, Q. Li, Y.K. Wang

France:LPSC Grenoble: MK, K. Kovarik, B. Fuks, J. Debove

Two-month visit of Q. Li to LPSC (march-april 2007):B. Fuks, M. Klasen, F. Ledroit, Q. Li, J. MorelPrecision predictions for Z’-production at the CERN LHC:Matrix elements, parton showers, and joint resummationSubmitted to Nucl. Phys. B, arXiv:0711/0749[hep-ph]

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January 15, 2008 Michael Klasen, LPSC Grenoble 16

Precise predictions for BSM at colliders (2)

January 15, 2008 Michael Klasen, LPSC Grenoble 17

Precise predictions for BSM at colliders (3)

Third generation (s)leptons particularly interesting:tan , SUSY parameters, co-annihilation, see-saw mechanism

-identification in ATLAS: [Hinchliffe, NPB PS 123 (2003) 229] [Tarrade]

Requires significant qT

Leptonic decays: qT + direct leptons 100 larger

Hadronic decays: qT + QCD jets 10 larger

Low multiplicity / inv. mass, tuned in Z-decay

-identification in CMS: [Gennai, NPB PS 123 (2003) 244] [Sirois / Qian]

Dedicated calorimeter triggerIsolated tracks, matched to calorimeter jet axisReduces QCD background by factor 1000

Proposal for 2008:Jointly supervised Ph.D. thesis (Y.K. Wang) + 1 visit each way

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ATLAS TDR

SUSY QCD /

January 15, 2008 Michael Klasen, LPSC Grenoble 18

Precise predictions for BSM at colliders (4)

SM: Only source of flavor violation is CKM matrixMSSM: Super-CKM basis At high energy Vub=Vub …However, different RGEs for quarks and squarksAt low energy, squark mass matrix non-diagonal:

and similarly for Md

Scaling with MSUSY:

Normalization: SU(2)L gauge invariance: LL

uu’ ≈ LLdd’

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January 15, 2008 Michael Klasen, LPSC Grenoble 19

Precise predictions for BSM at colliders (5)

One real parameter:

G. Bozzi et al., NPB 787

(2007) 1:

January 15, 2008 Michael Klasen, LPSC Grenoble 20

Cosmic rays & dark matter (1)Experiments:

HESS, PAMELA, Tibet Array; AMS, ARGO, GLASTTheoretical aspects:

Cosmic rays: Photons, neutrinos, anti-particlesDark matter signal flux: Clumps, asymmetriesBackground: Photons from anti-nuclei, anisotropies, transport

China:IHEP: X.J. Bi, C. Fan, H.B. Hu, Q. Yuan, J. Zhang, Y. Zhang

France:LAPTH Annecy: P. Salati, J. Lavalle (Torino), R. TailletLPNHE Jussieu: D. Maurin

2nd Sino-French workshop on the dark universe (sept. 2006):

Bi, Lavalle, Maurin, Yuan, submitted to A&A, arXiv:0709/3634Proposal for 2008:

3 visits China France, 3 visits France China

January 15, 2008 Michael Klasen, LPSC Grenoble 21

Cosmic rays & dark matter (2)SUSY-QCD corrections to DM annihilation in the Higgs funnel

B. Herrmann, MK, PRD 76 (2007) 1177041

0 10 A0 bb, dominates at large tan

Yukawa coupling:QCD loops to O(s

3), top loop @ O(s2), SUSY-QCD loops @ O(s)

Mass singularity:Resummation: mb mb/(1+mb),

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January 15, 2008 Michael Klasen, LPSC Grenoble 22

Talkspp colliders (Tevatron, LHC):

Chong-Sheng LI (Peking):Single top-quark production via SUSY FCNC couplings and model-independent FCNC couplings at hadron colliders

Shou-hua ZHU (Peking):Guiding stars for physics beyond the Standard Model:Higgs boson and dark matter

Qiang LI (Karlsruhe):Precision predictions for Z’-production at the LHC:QCD matrix elements, parton showers, and joint resummation

e+e- colliders (BEP, ILC):

Zhao-feng LIU (Paris-Sud):Moments of pion PDFs and baryon masses from twisted mass lattice QCD

Qiang ZHAO (IHEP):Intermediate meson loop contributions to charmonium radiative decays