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Title: Prospects of searches for neutral, long-lived particles that decay to photons using timing at CDF

Abstract

We present the prospects of searches for neutral, long-lived particles that decay to photons using their time of arrival measured with a newly installed timing system on the electromagnetic calorimeter (EMTiming) of the Collider Detector at Fermilab (CDF). A Monte Carlo simulation shows that EMTiming can provide separation between decay photons from neutral, long-lived particles and prompt photons from standard model backgrounds. Using gauge mediated supersymmetry breaking (GMSB) {chi}-tilde{sub 1}{sup 0}{yields}{gamma}G-tilde models, we estimate a quasi-model-independent sensitivity using only direct neutralino pair production, and also estimate the expected 95% confidence level exclusion regions for all superpartner production as a function of the neutralino mass and lifetime. We find that a combination of single photon and diphoton analyses should allow the Tevatron in Run II to easily extend the exclusion regions from ALEPH at LEP II at high neutralino masses and lifetimes, and cover parts of the theoretically favored m{sub G-tilde}<few keV/c{sup 2} GMSB parameter space.

Authors:
;  [1]
  1. Texas A and M University, College Station, Texas 77843-4242 (United States)
Publication Date:
OSTI Identifier:
20698143
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 70; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.70.114032; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPUTERIZED SIMULATION; FERMILAB COLLIDER DETECTOR; FERMILAB TEVATRON; INCLUSIVE INTERACTIONS; KEV RANGE; LEP STORAGE RINGS; LIFETIME; MONTE CARLO METHOD; PAIR PRODUCTION; PARTICLE DECAY; PHOTONS; PROTON-PROTON INTERACTIONS; REST MASS; SENSITIVITY; SPARTICLES; STANDARD MODEL; SUPERSYMMETRY; SYMMETRY BREAKING

Citation Formats

Toback, David, and Wagner, Peter. Prospects of searches for neutral, long-lived particles that decay to photons using timing at CDF. United States: N. p., 2004. Web. doi:10.1103/PhysRevD.70.114032.
Toback, David, & Wagner, Peter. Prospects of searches for neutral, long-lived particles that decay to photons using timing at CDF. United States. doi:10.1103/PhysRevD.70.114032.
Toback, David, and Wagner, Peter. Wed . "Prospects of searches for neutral, long-lived particles that decay to photons using timing at CDF". United States. doi:10.1103/PhysRevD.70.114032.
@article{osti_20698143,
title = {Prospects of searches for neutral, long-lived particles that decay to photons using timing at CDF},
author = {Toback, David and Wagner, Peter},
abstractNote = {We present the prospects of searches for neutral, long-lived particles that decay to photons using their time of arrival measured with a newly installed timing system on the electromagnetic calorimeter (EMTiming) of the Collider Detector at Fermilab (CDF). A Monte Carlo simulation shows that EMTiming can provide separation between decay photons from neutral, long-lived particles and prompt photons from standard model backgrounds. Using gauge mediated supersymmetry breaking (GMSB) {chi}-tilde{sub 1}{sup 0}{yields}{gamma}G-tilde models, we estimate a quasi-model-independent sensitivity using only direct neutralino pair production, and also estimate the expected 95% confidence level exclusion regions for all superpartner production as a function of the neutralino mass and lifetime. We find that a combination of single photon and diphoton analyses should allow the Tevatron in Run II to easily extend the exclusion regions from ALEPH at LEP II at high neutralino masses and lifetimes, and cover parts of the theoretically favored m{sub G-tilde}<few keV/c{sup 2} GMSB parameter space.},
doi = {10.1103/PhysRevD.70.114032},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 70,
place = {United States},
year = {2004},
month = {12}
}