First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC

S. Acharya; D. Adamova; MM. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; N. Ahmad; S.U. Ahn; S. Aiola; A. Akindinov; SN Alam; DSD Albuquerque; D. Aleksandrov; B Alessandro; Rafael A. Molina; A. Alici; Ian Bearden; Lais Ozelin de Lima Pimentel; Christian Alexander Bourjau; Ante Bilandzic; Marek Chojnacki; Jens Jørgen Gaardhøje; Freja Thoresen; Børge Svane Nielsen; bsm989 bsm989; Vojtech Pacik; You Zhou; Vytautas Vislavicius; Katarina Gajdosova; rtc312 rtc312

doi:10.1016/j.physletb.2017.11.044

First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC

S. Acharya, D. Adamova, MM. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, N. Ahmad, S.U. Ahn, S. Aiola, A. Akindinov, SN Alam, DSD Albuquerque, D. Aleksandrov, B Alessandro, Rafael A. Molina, A. Alici, Ian Bearden, Lais Ozelin de Lima Pimentel, Christian Alexander BourjauAnte Bilandzic, Marek Chojnacki, Jens Jørgen Gaardhøje, Freja Thoresen, Børge Svane Nielsen, bsm989 bsm989, Vojtech Pacik, You Zhou, Vytautas Vislavicius, Katarina Gajdosova, rtc312 rtc312

Experimental Particle Physics

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Abstract

This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at s_NN=2.76 TeV and s_NN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-k_T jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |η_jet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.

Original language	English
Journal	Physics Letters B
Volume	776
Pages (from-to)	249-264
Number of pages	16
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2017.11.044
Publication status	Published - 10 Jan 2018

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Acharya, S., Adamova, D., Aggarwal, MM., Rinella, G. A., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, N., Ahn, S. U., Aiola, S., Akindinov, A., Alam, SN., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Molina, R. A., Alici, A., Bearden, I., Pimentel, L. O. D. L., ... rtc312, R. (2018). First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC. Physics Letters B, 776, 249-264. https://doi.org/10.1016/j.physletb.2017.11.044

Acharya, S, Adamova, D, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, N, Ahn, SU, Aiola, S, Akindinov, A, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Molina, RA, Alici, A, Bearden, I, Pimentel, LODL, Bourjau, CA, Bilandzic, A, Chojnacki, M, Gaardhøje, JJ, Thoresen, F, Nielsen, BS , bsm989, B, Pacik, V, Zhou, Y, Vislavicius, V, Gajdosova, K & rtc312, R 2018, 'First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC', Physics Letters B, vol. 776, pp. 249-264. https://doi.org/10.1016/j.physletb.2017.11.044

@article{cf135a8cfeb14035bf5d226e4dd9304a,

title = "First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC",

abstract = "This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-kT jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |ηjet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.",

author = "S. Acharya and D. Adamova and MM. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahammed and N. Ahmad and S.U. Ahn and S. Aiola and A. Akindinov and SN Alam and DSD Albuquerque and D. Aleksandrov and B Alessandro and Molina, {Rafael A.} and A. Alici and Ian Bearden and Pimentel, {Lais Ozelin de Lima} and Bourjau, {Christian Alexander} and Ante Bilandzic and Marek Chojnacki and Gaardh{\o}je, {Jens J{\o}rgen} and Freja Thoresen and Nielsen, {B{\o}rge Svane} and bsm989 bsm989 and Vojtech Pacik and You Zhou and Vytautas Vislavicius and Katarina Gajdosova and rtc312 rtc312",

year = "2018",

month = jan,

day = "10",

doi = "10.1016/j.physletb.2017.11.044",

language = "English",

volume = "776",

pages = "249--264",

journal = "Physics Letters B",

issn = "0370-2693",

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TY - JOUR

T1 - First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC

AU - Acharya, S.

AU - Adamova, D.

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, N.

AU - Ahn, S.U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B

AU - Molina, Rafael A.

AU - Alici, A.

AU - Bearden, Ian

AU - Pimentel, Lais Ozelin de Lima

AU - Bourjau, Christian Alexander

AU - Bilandzic, Ante

AU - Chojnacki, Marek

AU - Gaardhøje, Jens Jørgen

AU - Thoresen, Freja

AU - Nielsen, Børge Svane

AU - bsm989, bsm989

AU - Pacik, Vojtech

AU - Zhou, You

AU - Vislavicius, Vytautas

AU - Gajdosova, Katarina

AU - rtc312, rtc312

PY - 2018/1/10

Y1 - 2018/1/10

N2 - This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-kT jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |ηjet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.

AB - This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-kT jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |ηjet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.

U2 - 10.1016/j.physletb.2017.11.044

DO - 10.1016/j.physletb.2017.11.044

M3 - Journal article

SN - 0370-2693

VL - 776

SP - 249

EP - 264

JO - Physics Letters B

JF - Physics Letters B

ER -

First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC

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