Direct Searches for Scalar Leptoquarks at the Run II Tevatron
Abstract
This dissertation sets new limits on the mass of the scalar leptoquark from direct searches carried out at the Run II CDF detector using data from March 2001 to October 2003. The data analyzed has a total time-integrated measured luminosity of 198 pb-1 of p$$\bar{p}$$ collisions with √s = 1.96 TeV. Leptoquarks are assumed to be pair-produced and to decay into a lepton and a quark of the same generation. They consider two possible leptoquark decays: (1) β = BR(LQ → μq) = 1.0, and (2) β = BR(LQ → μq) = 0.5. For the β = 1 channel, they focus on the signature represented by two isolated high-pT muons and two isolated high-pT jets. For the β = 1/2 channel, they focus on the signature represented by one isolated high-pT muon, large missing transverse energy, and two isolated high-pT jets. No leptoquark signal is experimentally detected for either signature. Using the next to leading order theoretical cross section for scalar leptoquark production in p$$\bar{p}$$ collisions [1], they set new mass limits on second generation scalar leptoquarks. They exclude the existence of second generation scalar leptoquarks with masses below 221(175) GeV/c2 for the β = 1(1/2) channels.
- Authors:
-
- Tufts Univ., Medford, MA (United States)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 15020224
- Report Number(s):
- FERMILAB-THESIS-2004-42
TRN: US0605192
- DOE Contract Number:
- AC02-76CH03000
- Resource Type:
- Thesis/Dissertation
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CROSS SECTIONS; DECAY; FERMILAB COLLIDER DETECTOR; FERMILAB TEVATRON; LEPTONS; LUMINOSITY; MUONS; PRODUCTION; QUARKS; SCALARS; TRANSVERSE ENERGY; Experiment-HEP
Citation Formats
Ryan, Daniel Edward. Direct Searches for Scalar Leptoquarks at the Run II Tevatron. United States: N. p., 2004.
Web. doi:10.2172/15020224.
Ryan, Daniel Edward. Direct Searches for Scalar Leptoquarks at the Run II Tevatron. United States. https://doi.org/10.2172/15020224
Ryan, Daniel Edward. 2004.
"Direct Searches for Scalar Leptoquarks at the Run II Tevatron". United States. https://doi.org/10.2172/15020224. https://www.osti.gov/servlets/purl/15020224.
@article{osti_15020224,
title = {Direct Searches for Scalar Leptoquarks at the Run II Tevatron},
author = {Ryan, Daniel Edward},
abstractNote = {This dissertation sets new limits on the mass of the scalar leptoquark from direct searches carried out at the Run II CDF detector using data from March 2001 to October 2003. The data analyzed has a total time-integrated measured luminosity of 198 pb-1 of p$\bar{p}$ collisions with √s = 1.96 TeV. Leptoquarks are assumed to be pair-produced and to decay into a lepton and a quark of the same generation. They consider two possible leptoquark decays: (1) β = BR(LQ → μq) = 1.0, and (2) β = BR(LQ → μq) = 0.5. For the β = 1 channel, they focus on the signature represented by two isolated high-pT muons and two isolated high-pT jets. For the β = 1/2 channel, they focus on the signature represented by one isolated high-pT muon, large missing transverse energy, and two isolated high-pT jets. No leptoquark signal is experimentally detected for either signature. Using the next to leading order theoretical cross section for scalar leptoquark production in p$\bar{p}$ collisions [1], they set new mass limits on second generation scalar leptoquarks. They exclude the existence of second generation scalar leptoquarks with masses below 221(175) GeV/c2 for the β = 1(1/2) channels.},
doi = {10.2172/15020224},
url = {https://www.osti.gov/biblio/15020224},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 2004},
month = {Sun Aug 01 00:00:00 EDT 2004}
}