Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV

A study of the associated production of a Z boson and a charm quark jet (Z + c), and a comparison to production with a b quark jet (Z + b), in pp collisions at a centre-of-mass energy of 8 TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb−1, co...

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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 Verlag 2018
Subjects:	Q Science (General) QC Physics
Online Access:	http://irep.iium.edu.my/70402/ http://irep.iium.edu.my/70402/ http://irep.iium.edu.my/70402/ http://irep.iium.edu.my/70402/1/70402_Measurement%20of%20associated%20Z%20%2B%20charm%20production_new.pdf http://irep.iium.edu.my/70402/7/70402_Measurement%20of%20associated%20Z%20plus%20charm%20production_wos.pdf

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spelling	iium-704022019-07-15T01:31:27Z http://irep.iium.edu.my/70402/ Measurement of associated Z plus charm production in proton-proton 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 A study of the associated production of a Z boson and a charm quark jet (Z + c), and a comparison to production with a b quark jet (Z + b), in pp collisions at a centre-of-mass energy of 8 TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb−1, collected with the CMS detector at the CERN LHC. The Z boson candidates are identified through their decays into pairs of electrons or muons. Jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays of charm hadrons. The measurements are performed in the kinematic region with two leptons with p T > 20 GeV, \|η\| < 2.1, 71 < m < 111 GeV, and heavy flavour jets with p jet T > 25 GeV and \|ηjet\| < 2.5. The Z + c production cross section is measured to be σ (pp → Z + c + X)B(Z → +−) = 8.8±0.5 (stat)±0.6 (syst) pb. The ratio of the Z+c and Z+b production cross sections is measured to be σ (pp → Z+c+X)/σ (pp → Z+b+X) = 2.0±0.2 (stat)±0.2 (syst). The Z+c production cross section and the cross section ratio are also measured as a function of the transverse momentum of the Z boson and of the heavy flavour jet. The measurements are compared with theoretical predictions. Springer Verlag 2018-04-09 Article PeerReviewed application/pdf en http://irep.iium.edu.my/70402/1/70402_Measurement%20of%20associated%20Z%20%2B%20charm%20production_new.pdf application/pdf en http://irep.iium.edu.my/70402/7/70402_Measurement%20of%20associated%20Z%20plus%20charm%20production_wos.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 associated Z plus charm production in proton-proton collisions at root s=8TeV. The European Physical Journal C, 78 (4). pp. 1-34. ISSN 1434-6044 E-ISSN 1434-6052 https://helda.helsinki.fi//bitstream/handle/10138/235488/10.1140_epjc_s10052_018_5752_x.pdf?sequence=1 10.1140/epjc/s10052-018-5752-x
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 associated Z plus charm production in proton-proton collisions at root s=8TeV
description	A study of the associated production of a Z boson and a charm quark jet (Z + c), and a comparison to production with a b quark jet (Z + b), in pp collisions at a centre-of-mass energy of 8 TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb−1, collected with the CMS detector at the CERN LHC. The Z boson candidates are identified through their decays into pairs of electrons or muons. Jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays of charm hadrons. The measurements are performed in the kinematic region with two leptons with p T > 20 GeV, \|η\| < 2.1, 71 < m < 111 GeV, and heavy flavour jets with p jet T > 25 GeV and \|ηjet\| < 2.5. The Z + c production cross section is measured to be σ (pp → Z + c + X)B(Z → +−) = 8.8±0.5 (stat)±0.6 (syst) pb. The ratio of the Z+c and Z+b production cross sections is measured to be σ (pp → Z+c+X)/σ (pp → Z+b+X) = 2.0±0.2 (stat)±0.2 (syst). The Z+c production cross section and the cross section ratio are also measured as a function of the transverse momentum of the Z boson and of the heavy flavour jet. The measurements are compared with theoretical predictions.
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 associated Z plus charm production in proton-proton collisions at root s=8TeV
title_short	Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV
title_full	Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV
title_fullStr	Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV
title_full_unstemmed	Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV
title_sort	measurement of associated z plus charm production in proton-proton collisions at root s=8tev
publisher	Springer Verlag
publishDate	2018
url	http://irep.iium.edu.my/70402/ http://irep.iium.edu.my/70402/ http://irep.iium.edu.my/70402/ http://irep.iium.edu.my/70402/1/70402_Measurement%20of%20associated%20Z%20%2B%20charm%20production_new.pdf http://irep.iium.edu.my/70402/7/70402_Measurement%20of%20associated%20Z%20plus%20charm%20production_wos.pdf
first_indexed	2023-09-18T21:39:56Z
last_indexed	2023-09-18T21:39:56Z
_version_	1777413072541974528

Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV

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