Measurement of b hadron lifetimes in pp collisions at root s=8TeV

Measurement of b hadron lifetimes in pp collisions at root s=8TeV

Measurements are presented of the lifetimes of the B0, B0 s, 0 b, and B+ c hadrons using the decay channels B0 → J/ψK∗(892)0, B0 → J/ψK0 S, B0 s → J/ψπ+π−, B0 s → J/ψφ(1020), Λ0 b → J/ψ0, and B+ c → J/ψπ+. The data sample, corresponding to an integrated luminosity of 19.7 fb−1, was colle...

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Main Authors: Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Ambrogi, Federico, Asilar, Ece, Md. Ali, Mohd. Adli
Format: Article
Language:English
English
Published: Springer Nature 2018
Subjects:
Q Science (General)
QC Physics
Online Access:http://irep.iium.edu.my/70307/
http://irep.iium.edu.my/70307/
http://irep.iium.edu.my/70307/
http://irep.iium.edu.my/70307/1/70307_Measurement%20of%20b%20hadron%20lifetimes%20in%20pp%20_article.pdf
http://irep.iium.edu.my/70307/2/70307_Measurement%20of%20b%20hadron%20lifetimes%20in%20pp%20_scopus.pdf
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spelling iium-703072019-07-15T01:37:06Z http://irep.iium.edu.my/70307/ Measurement of b hadron lifetimes in pp collisions at root s=8TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Q Science (General) QC Physics Measurements are presented of the lifetimes of the B0, B0 s, 0 b, and B+ c hadrons using the decay channels B0 → J/ψK∗(892)0, B0 → J/ψK0 S, B0 s → J/ψπ+π−, B0 s → J/ψφ(1020), Λ0 b → J/ψ0, and B+ c → J/ψπ+. The data sample, corresponding to an integrated luminosity of 19.7 fb−1, was collected by the CMS detector at the LHC in proton–proton collisions at √s = 8 TeV. The B0 lifetime is measured to be 453.0 ± 1.6 (stat) ± 1.8 (syst)µm in J/ψK∗(892)0and 457.8 ± 2.7 (stat) ± 2.8 (syst)µm in J/ψK0 S, which results in a combined measurement of cτB0 = 454.1 ± 1.4 (stat) ± 1.7 (syst)µm. The effective lifetime of the B0 s meson is measured in two decay modes, with contributions from different amounts of the heavy and light eigenstates. This results in two different measured lifetimes: cτB0 s→J/ψπ+π− = 502.7 ± 10.2 (stat) ± 3.4 (syst)µm and cτB0 s→J/ψφ(1020) = 443.9 ± 2.0 (stat) ± 1.5 (syst)µm. The 0 b lifetime is found to be 442.9 ± 8.2 (stat) ± 2.8 (syst)µm. The precision from each of these channels is as good as or better than previous measurements. The B+ c lifetime, measured with respect to the B+ to reduce the systematic uncertainty, is 162.3 ± 7.8 (stat) ± 4.2 (syst) ± 0.1 (τB+ )µm. All results are in agreement with current world-average values. Springer Nature 2018-06-01 Article NonPeerReviewed application/pdf en http://irep.iium.edu.my/70307/1/70307_Measurement%20of%20b%20hadron%20lifetimes%20in%20pp%20_article.pdf application/pdf en http://irep.iium.edu.my/70307/2/70307_Measurement%20of%20b%20hadron%20lifetimes%20in%20pp%20_scopus.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Measurement of b hadron lifetimes in pp collisions at root s=8TeV. European Physical Journal C, 78 (6). pp. 1-28. ISSN 1434-6044 E-ISSN 1434-6052 https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-5929-3.pdf 10.1140/epjc/s10052-018-5929-3
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
English
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Sirunyan, A. M.
Tumasyan, A. R.
Adam, Wolfgang
Ambrogi, Federico
Asilar, Ece
Md. Ali, Mohd. Adli
Measurement of b hadron lifetimes in pp collisions at root s=8TeV
description Measurements are presented of the lifetimes of the B0, B0 s, 0 b, and B+ c hadrons using the decay channels B0 → J/ψK∗(892)0, B0 → J/ψK0 S, B0 s → J/ψπ+π−, B0 s → J/ψφ(1020), Λ0 b → J/ψ0, and B+ c → J/ψπ+. The data sample, corresponding to an integrated luminosity of 19.7 fb−1, was collected by the CMS detector at the LHC in proton–proton collisions at √s = 8 TeV. The B0 lifetime is measured to be 453.0 ± 1.6 (stat) ± 1.8 (syst)µm in J/ψK∗(892)0and 457.8 ± 2.7 (stat) ± 2.8 (syst)µm in J/ψK0 S, which results in a combined measurement of cτB0 = 454.1 ± 1.4 (stat) ± 1.7 (syst)µm. The effective lifetime of the B0 s meson is measured in two decay modes, with contributions from different amounts of the heavy and light eigenstates. This results in two different measured lifetimes: cτB0 s→J/ψπ+π− = 502.7 ± 10.2 (stat) ± 3.4 (syst)µm and cτB0 s→J/ψφ(1020) = 443.9 ± 2.0 (stat) ± 1.5 (syst)µm. The 0 b lifetime is found to be 442.9 ± 8.2 (stat) ± 2.8 (syst)µm. The precision from each of these channels is as good as or better than previous measurements. The B+ c lifetime, measured with respect to the B+ to reduce the systematic uncertainty, is 162.3 ± 7.8 (stat) ± 4.2 (syst) ± 0.1 (τB+ )µm. All results are in agreement with current world-average values.
format Article
author Sirunyan, A. M.
Tumasyan, A. R.
Adam, Wolfgang
Ambrogi, Federico
Asilar, Ece
Md. Ali, Mohd. Adli
author_facet Sirunyan, A. M.
Tumasyan, A. R.
Adam, Wolfgang
Ambrogi, Federico
Asilar, Ece
Md. Ali, Mohd. Adli
author_sort Sirunyan, A. M.
title Measurement of b hadron lifetimes in pp collisions at root s=8TeV
title_short Measurement of b hadron lifetimes in pp collisions at root s=8TeV
title_full Measurement of b hadron lifetimes in pp collisions at root s=8TeV
title_fullStr Measurement of b hadron lifetimes in pp collisions at root s=8TeV
title_full_unstemmed Measurement of b hadron lifetimes in pp collisions at root s=8TeV
title_sort measurement of b hadron lifetimes in pp collisions at root s=8tev
publisher Springer Nature
publishDate 2018
url http://irep.iium.edu.my/70307/
http://irep.iium.edu.my/70307/
http://irep.iium.edu.my/70307/
http://irep.iium.edu.my/70307/1/70307_Measurement%20of%20b%20hadron%20lifetimes%20in%20pp%20_article.pdf
http://irep.iium.edu.my/70307/2/70307_Measurement%20of%20b%20hadron%20lifetimes%20in%20pp%20_scopus.pdf
first_indexed 2023-09-18T21:39:49Z
last_indexed 2023-09-18T21:39:49Z
_version_ 1777413064347353088

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