Polarized top quarks from new physics: Signals and observables

Research output: Contribution to journalArticle

Abstract

Top quarks may be produced in large numbers in association with new physics at the LHC. The polarization of these top quarks probes the chiral structure of the new physics. We discuss several kinematic distributions which are sensitive to the polarization of single top quarks and can be used without full event reconstruction. For collimated tops we construct polarization-sensitive observables for both hadronic and leptonic decay modes and plot their distributions. We compute the observable polarization signals from top quarks produced in the on-shell cascade decay of a stop squark into a top quark and a neutralino, as well as top quarks produced in the analogous decay chain in same-spin partner models.

Original languageEnglish (US)
Article number014032
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume79
Issue number1
DOIs
StatePublished - Jan 5 2009
Externally publishedYes

Fingerprint

quarks
physics
polarization
decay
cascades
kinematics
plots
probes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Polarized top quarks from new physics : Signals and observables. / Shelton, Jessie.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 79, No. 1, 014032, 05.01.2009.

Research output: Contribution to journalArticle

@article{3a0aeeb8e6334d2a8d41239852bdd6fc,
title = "Polarized top quarks from new physics: Signals and observables",
abstract = "Top quarks may be produced in large numbers in association with new physics at the LHC. The polarization of these top quarks probes the chiral structure of the new physics. We discuss several kinematic distributions which are sensitive to the polarization of single top quarks and can be used without full event reconstruction. For collimated tops we construct polarization-sensitive observables for both hadronic and leptonic decay modes and plot their distributions. We compute the observable polarization signals from top quarks produced in the on-shell cascade decay of a stop squark into a top quark and a neutralino, as well as top quarks produced in the analogous decay chain in same-spin partner models.",
author = "Jessie Shelton",
year = "2009",
month = "1",
day = "5",
doi = "10.1103/PhysRevD.79.014032",
language = "English (US)",
volume = "79",
journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",
issn = "1550-7998",
number = "1",

}

TY - JOUR

T1 - Polarized top quarks from new physics

T2 - Signals and observables

AU - Shelton, Jessie

PY - 2009/1/5

Y1 - 2009/1/5

N2 - Top quarks may be produced in large numbers in association with new physics at the LHC. The polarization of these top quarks probes the chiral structure of the new physics. We discuss several kinematic distributions which are sensitive to the polarization of single top quarks and can be used without full event reconstruction. For collimated tops we construct polarization-sensitive observables for both hadronic and leptonic decay modes and plot their distributions. We compute the observable polarization signals from top quarks produced in the on-shell cascade decay of a stop squark into a top quark and a neutralino, as well as top quarks produced in the analogous decay chain in same-spin partner models.

AB - Top quarks may be produced in large numbers in association with new physics at the LHC. The polarization of these top quarks probes the chiral structure of the new physics. We discuss several kinematic distributions which are sensitive to the polarization of single top quarks and can be used without full event reconstruction. For collimated tops we construct polarization-sensitive observables for both hadronic and leptonic decay modes and plot their distributions. We compute the observable polarization signals from top quarks produced in the on-shell cascade decay of a stop squark into a top quark and a neutralino, as well as top quarks produced in the analogous decay chain in same-spin partner models.

UR - http://www.scopus.com/inward/record.url?scp=60949113512&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=60949113512&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.79.014032

DO - 10.1103/PhysRevD.79.014032

M3 - Article

AN - SCOPUS:60949113512

VL - 79

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 1

M1 - 014032

ER -