Hunting for the top partner in the littlest Higgs model with T parity at the CERN LHC

Journal Article · Thu Mar 01 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.055006· OSTI ID:21020091

Matsumoto, Shigeki; Nojiri, Mihoko M; Nomura, Daisuke ^[1]

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1. Theory Group, KEK, 1-1 Oho, Tsukuba, 305-0801 (Japan)

We study the littlest Higgs model with T parity at the CERN LHC through pair productions of the T-odd top quark partner (T{sub -}) which decays into the top quark and the lightest T-odd particle. We identify the region of parameters favored by the electroweak and cosmological considerations. The signal and background events are simulated with fast detector simulation to study the discovery potential at the LHC. We find that the hemisphere analysis recently proposed by the CMS Collaboration is very useful to separate the signal from the tt background. We discuss the observability of the top tagged signal in the effective mass (M{sub eff}) versus the transverse missing energy (E{sub Tmiss}) plane. We show that, for all our sample parameter sets with M{sub T{sub -}}{<=}900 GeV, the excess of the signal over the background can be visible as a bump structure in the E{sub Tmiss} distribution for 50 fb{sup -1} at relatively high M{sub eff} intervals.

• OSTI ID: 21020091
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
COSMOLOGY
DISTRIBUTION
EFFECTIVE MASS
ELECTROMAGNETIC INTERACTIONS
GEV RANGE
HIGGS MODEL
PAIR PRODUCTION
PARITY
PARTICLE DECAY
PARTICLE IDENTIFICATION
POTENTIALS
T QUARKS
TOPONIUM
WEAK INTERACTIONS