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

Abstract

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.

Authors:
; ;  [1]
  1. Theory Group, KEK, 1-1 Oho, Tsukuba, 305-0801 (Japan)
Publication Date:
OSTI Identifier:
21020091
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.055006; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Matsumoto, Shigeki, Nojiri, Mihoko M., and Nomura, Daisuke. Hunting for the top partner in the littlest Higgs model with T parity at the CERN LHC. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.055006.
Matsumoto, Shigeki, Nojiri, Mihoko M., & Nomura, Daisuke. Hunting for the top partner in the littlest Higgs model with T parity at the CERN LHC. United States. doi:10.1103/PHYSREVD.75.055006.
Matsumoto, Shigeki, Nojiri, Mihoko M., and Nomura, Daisuke. Thu . "Hunting for the top partner in the littlest Higgs model with T parity at the CERN LHC". United States. doi:10.1103/PHYSREVD.75.055006.
@article{osti_21020091,
title = {Hunting for the top partner in the littlest Higgs model with T parity at the CERN LHC},
author = {Matsumoto, Shigeki and Nojiri, Mihoko M. and Nomura, Daisuke},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.75.055006},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}