Measurement of top quark polarisation in t-channel single top quark production
Abstract
Our first measurement of the top quark spin asymmetry, sensitive to the top quark polarisation, in t-channel single top quark production is presented. It is based on a sample of pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.7 fb-1. A high-purity sample of t-channel single top quark events with an isolated muon is selected. Signal and background components are estimated using a fit to data. Furthermore, a differential cross section measurement, corrected for detector effects, of an angular observable sensitive to the top quark polarisation is performed. The differential distribution is used to extract a top quark spin asymmetry of 0.26 ± 0.03 (stat) ± 0.10 (syst), which is compatible with a p-value of 4.6% with the standard model prediction of 0.44.
- Authors:
-
- Yerevan Physics Inst. (YerPhI) (Armenia). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- CMS Collaboration
- OSTI Identifier:
- 1230033
- Report Number(s):
- FERMILAB-PUB-15-518-CMS
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1511.02138
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 73; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Khachatryan, Vardan. Measurement of top quark polarisation in t-channel single top quark production. United States: N. p., 2016.
Web. doi:10.1007/JHEP04(2016)073.
Khachatryan, Vardan. Measurement of top quark polarisation in t-channel single top quark production. United States. https://doi.org/10.1007/JHEP04(2016)073
Khachatryan, Vardan. Wed .
"Measurement of top quark polarisation in t-channel single top quark production". United States. https://doi.org/10.1007/JHEP04(2016)073. https://www.osti.gov/servlets/purl/1230033.
@article{osti_1230033,
title = {Measurement of top quark polarisation in t-channel single top quark production},
author = {Khachatryan, Vardan},
abstractNote = {Our first measurement of the top quark spin asymmetry, sensitive to the top quark polarisation, in t-channel single top quark production is presented. It is based on a sample of pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.7 fb-1. A high-purity sample of t-channel single top quark events with an isolated muon is selected. Signal and background components are estimated using a fit to data. Furthermore, a differential cross section measurement, corrected for detector effects, of an angular observable sensitive to the top quark polarisation is performed. The differential distribution is used to extract a top quark spin asymmetry of 0.26 ± 0.03 (stat) ± 0.10 (syst), which is compatible with a p-value of 4.6% with the standard model prediction of 0.44.},
doi = {10.1007/JHEP04(2016)073},
journal = {Journal of High Energy Physics (Online)},
number = 73,
volume = 2016,
place = {United States},
year = {Wed Apr 13 00:00:00 EDT 2016},
month = {Wed Apr 13 00:00:00 EDT 2016}
}
Web of Science
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Works referencing / citing this record:
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