Transverse momentum spectra of inclusive b jets in pPb collisions atv root s(NN)=5.02 TeV

Khachatryan, V.; Adžić, Petar; Ekmedzic, M.; Milošević, Jovan; Rekovic, V.; Đorđević, Miloš; Milenović, Predrag

doi:10.1016/j.physletb.2016.01.010

2016

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Authors

Khachatryan, V.
Adžić, Petar
Ekmedzic, M.
Milošević, Jovan

Rekovic, V.
Đorđević, Miloš

Milenović, Predrag

CMS Collaboration (ukupan broj autora: 2312)

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Abstract

We present a measurement of b jet transverse momentum (p(T)) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35nb(-1) collected with the CMS detector at the LHC. Jets from b quark fragmentation are found by exploiting the long lifetime of hadrons containing a b quark through tagging methods using distributions of the secondary vertex mass and displacement. Extracted cross sections for b jets are scaled by the effective number of nucleon-nucleon collisions and are compared to a reference obtained from PYTHIA simulations of pp collisions. The PYTHIA-based estimate of the nuclear modification factor is found to be 1.22 +/- 0.15 (stat + syst pPb) +/- 0.27 (syst PYTHIA) averaged over all jets with p(T) between 55 and 400 GeV/c and with |eta(lab)| LT 2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics. (C) 2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V.

Keywords:

CMS / Physics / Heavy ions / b-tagging

Source:
Physics Letters B, 2016, 754, 59-80

Projects:

BMWFW (Austria), FWF (Austria), FNRS (Belgium), FWO (Belgium), CNPq (Brazil), CAPES (Brazil), FAPERJ (Brazil), FAPESP (Brazil), MES (Bulgaria), CERN (China), CAS (China), MOST (China), NSFC (China), COLCIENCIAS (Colombia), MSES (Croatia), CSF (Croatia), RPF (Cyprus), MoER (Estonia), ERC IUT (Estonia), ERDF (Estonia), Academy of Finland, MEC (Finland), HIP (Finland), CEA (France), CNRS/IN2P3 (France), BMBF, Germany, DFG (Germany), HGF (Germany), GSRT (Greece), OTKA (Hungary), NIH (Hungary), DAE (India), DST (India), IPM (Iran), SFI (Ireland), INFN (Italy), MSIP (Republic of Korea), NRF (Republic of Korea), LAS (Lithuania), MOE (Malaysia), UM (Malaysia), CINVESTAV (Mexico), CONACYT (Mexico), SEP (Mexico), UASLP-FAI (Mexico), MBIE (New Zealand), PAEC (Pakistan), MSHE (Poland), NSC (Poland), FCT (Portugal), JINR (Dubna), MON (Russia), RosAtom (Russia), RAS (Russia), RFBR (Russia), MESTD (Serbia), SEIDI (Spain), CPAN (Spain), Swiss Funding Agencies (Switzerland), MST (Taipei), ThEPCenter (Thailand), IPST (Thailand), STAR (Thailand), NSTDA (Thailand), TUBITAK (Turkey), TAEK (Turkey), NASU (Ukraine), SFFR (Ukraine), STFC (United Kingdom), DOE (USA), NSF (USA), Marie-Curie programme, European Research Council and EPLANET (European Union), Leventis Foundation, Alfred P. Sloan Foundation, Alexander von Humboldt Foundation, Belgian Federal Science Policy Office, Fonds pour la Formation a la Recherche dans lIndustrie et dans lAgriculture(FRIA-Belgium), Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium), Ministry of Education, Youth and Sports (MEYS) of the Czech Republic, Council of Science and Industrial Research, India, HOMING PLUS programme of the Foundation for Polish Science, European Union, Regional Development Fund, OPUS programme of the National Science Centre(Poland), Compagnia di San Paolo (Torino), Consorzio per la Fisica (Trieste), MIUR (Italy) [20108T4XTM], Thalis and Aristeia programmes, EU-ESF, Greek NSRF, National Priorities Research Program by Qatar National Research Fund, Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University (Thailand), Welch Foundation [C-1845]

DOI: 10.1016/j.physletb.2016.01.010

ISSN: 0370-2693; 1873-2445

WoS: 000369601000011

Scopus: 2-s2.0-85040922567

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TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ekmedzic, M.
AU  - Milošević, Jovan
AU  - Rekovic, V.
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/931
AB  - We present a measurement of b jet transverse momentum (p(T)) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35nb(-1) collected with the CMS detector at the LHC. Jets from b quark fragmentation are found by exploiting the long lifetime of hadrons containing a b quark through tagging methods using distributions of the secondary vertex mass and displacement. Extracted cross sections for b jets are scaled by the effective number of nucleon-nucleon collisions and are compared to a reference obtained from PYTHIA simulations of pp collisions. The PYTHIA-based estimate of the nuclear modification factor is found to be 1.22 +/- 0.15 (stat + syst pPb) +/- 0.27 (syst PYTHIA) averaged over all jets with p(T) between 55 and 400 GeV/c and with |eta(lab)| LT 2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics. (C) 2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Transverse momentum spectra of inclusive b jets in pPb collisions atv root s(NN)=5.02 TeV
VL  - 754
SP  - 59
EP  - 80
DO  - 10.1016/j.physletb.2016.01.010
ER  -

@article{
author = "Khachatryan, V. and Adžić, Petar and Ekmedzic, M. and Milošević, Jovan and Rekovic, V. and Đorđević, Miloš and Milenović, Predrag",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/931",
abstract = "We present a measurement of b jet transverse momentum (p(T)) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35nb(-1) collected with the CMS detector at the LHC. Jets from b quark fragmentation are found by exploiting the long lifetime of hadrons containing a b quark through tagging methods using distributions of the secondary vertex mass and displacement. Extracted cross sections for b jets are scaled by the effective number of nucleon-nucleon collisions and are compared to a reference obtained from PYTHIA simulations of pp collisions. The PYTHIA-based estimate of the nuclear modification factor is found to be 1.22 +/- 0.15 (stat + syst pPb) +/- 0.27 (syst PYTHIA) averaged over all jets with p(T) between 55 and 400 GeV/c and with |eta(lab)| LT 2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics. (C) 2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Transverse momentum spectra of inclusive b jets in pPb collisions atv root s(NN)=5.02 TeV",
volume = "754",
pages = "59-80",
doi = "10.1016/j.physletb.2016.01.010"
}

Khachatryan V, Adžić P, Ekmedzic M, Milošević J, Rekovic V, Đorđević M, Milenović P. Transverse momentum spectra of inclusive b jets in pPb collisions atv root s(NN)=5.02 TeV. Physics Letters B. 2016;754:59-80

Khachatryan, V., Adžić, P., Ekmedzic, M., Milošević, J., Rekovic, V., Đorđević, M.,& Milenović, P. (2016). Transverse momentum spectra of inclusive b jets in pPb collisions atv root s(NN)=5.02 TeV.
Physics Letters B, 754, 59-80.
https://doi.org/10.1016/j.physletb.2016.01.010

Khachatryan V., Adžić Petar, Ekmedzic M., Milošević Jovan, Rekovic V., Đorđević Miloš, Milenović Predrag, "Transverse momentum spectra of inclusive b jets in pPb collisions atv root s(NN)=5.02 TeV" 754 (2016):59-80,
https://doi.org/10.1016/j.physletb.2016.01.010 .