Constraints on jet quenching in p-Pb collisions at root s(NN)=5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions

S. Acharya; D. Adamova; J Adolfsson; MM. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; S.U. Ahn; S. Aiola; A. Akindinov; M. Al-Turany; SN Alam; DSD Albuquerque; D. Aleksandrov; B Alessandro; R. Alfaro-Molina; A. Alici; A. Alkin; J. Alme; Ian Bearden; Christian Holm Christensen; You Zhou; Christian Alexander Bourjau; Børge Svane Nielsen; bsm989 bsm989; Marek Chojnacki; Ante Bilandzic; Freja Thoresen; Katarina Gajdosova; Jens Jørgen Gaardhøje; Ozelin De Lima Pimentel Lais; Vojtech Pacik; Vytautas Vislavicius

doi:10.1016/j.physletb.2018.05.059

Constraints on jet quenching in p-Pb collisions at root s(NN)=5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions

S. Acharya, D. Adamova, J Adolfsson, MM. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, S. Aiola, A. Akindinov, M. Al-Turany, SN Alam, DSD Albuquerque, D. Aleksandrov, B Alessandro, R. Alfaro-Molina, A. Alici, A. Alkin, J. AlmeIan Bearden, Christian Holm Christensen, You Zhou, Christian Alexander Bourjau, Børge Svane Nielsen, bsm989 bsm989, Marek Chojnacki, Ante Bilandzic, Freja Thoresen, Katarina Gajdosova, Jens Jørgen Gaardhøje, Ozelin De Lima Pimentel Lais, Vojtech Pacik, Vytautas Vislavicius

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Abstract

The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at s_NN=5.02 TeV. Jets are reconstructed from charged-particle tracks using the anti-k_T algorithm with resolution parameter R=0.2 and 0.4. A data-driven statistical approach is used to correct the uncorrelated background jet yield. Recoil jet distributions are reported for jet transverse momentum 15<p_T,jet ^ch<50GeV/c and are compared in various intervals of p–Pb event activity, based on charged-particle multiplicity and zero-degree neutral energy in the forward (Pb-going) direction. The semi-inclusive observable is self-normalized and such comparisons do not require the interpretation of p–Pb event activity in terms of collision geometry, in contrast to inclusive jet observables. These measurements provide new constraints on the magnitude of jet quenching in small systems at the LHC. In p–Pb collisions with high event activity, the average medium-induced out-of-cone energy transport for jets with R=0.4 and 15<p_T,jet ^ch<50GeV/c is measured to be less than 0.4 GeV/c at 90% confidence, which is over an order of magnitude smaller than a similar measurement for central Pb–Pb collisions at s_NN=2.76TeV. Comparison is made to theoretical calculations of jet quenching in small systems, and to inclusive jet measurements in p–Pb collisions selected by event activity at the LHC and in d–Au collisions at RHIC.

Originalsprog	Engelsk
Tidsskrift	Physics Letters B
Vol/bind	783
Sider (fra-til)	95-113
Antal sider	19
ISSN	0370-2693
DOI	https://doi.org/10.1016/j.physletb.2018.05.059
Status	Udgivet - 10 aug. 2018

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10.1016/j.physletb.2018.05.059Licens: CC BY

1-s2.0-S0370269318304234-mainForlagets udgivne version, 1,01 MBLicens: CC BY

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Acharya, S., Adamova, D., Adolfsson, J., Aggarwal, MM., Rinella, G. A., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S. U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, SN., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Alfaro-Molina, R., Alici, A., Alkin, A., ... Vislavicius, V. (2018). Constraints on jet quenching in p-Pb collisions at root s(NN)=5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions. Physics Letters B, 783, 95-113. https://doi.org/10.1016/j.physletb.2018.05.059

Acharya, S, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU, Aiola, S, Akindinov, A, Al-Turany, M, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Alfaro-Molina, R, Alici, A, Alkin, A, Alme, J, Bearden, I , Christensen, CH , Zhou, Y, Bourjau, CA, Nielsen, BS , bsm989, B, Chojnacki, M, Bilandzic, A, Thoresen, F, Gajdosova, K, Gaardhøje, JJ, Lais, ODLP, Pacik, V & Vislavicius, V 2018, 'Constraints on jet quenching in p-Pb collisions at root s(NN)=5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions', Physics Letters B, bind 783, s. 95-113. https://doi.org/10.1016/j.physletb.2018.05.059

@article{4ec843ec6b8c4266b28c0cb99775064c,

title = "Constraints on jet quenching in p-Pb collisions at root s(NN)=5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions",

abstract = "The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at sNN=5.02 TeV. Jets are reconstructed from charged-particle tracks using the anti-kT algorithm with resolution parameter R=0.2 and 0.4. A data-driven statistical approach is used to correct the uncorrelated background jet yield. Recoil jet distributions are reported for jet transverse momentum 15T,jet ch<50GeV/c and are compared in various intervals of p–Pb event activity, based on charged-particle multiplicity and zero-degree neutral energy in the forward (Pb-going) direction. The semi-inclusive observable is self-normalized and such comparisons do not require the interpretation of p–Pb event activity in terms of collision geometry, in contrast to inclusive jet observables. These measurements provide new constraints on the magnitude of jet quenching in small systems at the LHC. In p–Pb collisions with high event activity, the average medium-induced out-of-cone energy transport for jets with R=0.4 and 15T,jet ch<50GeV/c is measured to be less than 0.4 GeV/c at 90% confidence, which is over an order of magnitude smaller than a similar measurement for central Pb–Pb collisions at sNN=2.76TeV. Comparison is made to theoretical calculations of jet quenching in small systems, and to inclusive jet measurements in p–Pb collisions selected by event activity at the LHC and in d–Au collisions at RHIC.",

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

year = "2018",

month = aug,

day = "10",

doi = "10.1016/j.physletb.2018.05.059",

language = "English",

volume = "783",

pages = "95--113",

journal = "Physics Letters B: Particle Physics, Nuclear Physics and Cosmology",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - Constraints on jet quenching in p-Pb collisions at root s(NN)=5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions

AU - Acharya, S.

AU - Adamova, D.

AU - Adolfsson, J

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahn, S.U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B

AU - Alfaro-Molina, R.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Bearden, Ian

AU - Christensen, Christian Holm

AU - Zhou, You

AU - Bourjau, Christian Alexander

AU - Nielsen, Børge Svane

AU - bsm989, bsm989

AU - Chojnacki, Marek

AU - Bilandzic, Ante

AU - Thoresen, Freja

AU - Gajdosova, Katarina

AU - Gaardhøje, Jens Jørgen

AU - Lais, Ozelin De Lima Pimentel

AU - Pacik, Vojtech

AU - Vislavicius, Vytautas

PY - 2018/8/10

Y1 - 2018/8/10

N2 - The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at sNN=5.02 TeV. Jets are reconstructed from charged-particle tracks using the anti-kT algorithm with resolution parameter R=0.2 and 0.4. A data-driven statistical approach is used to correct the uncorrelated background jet yield. Recoil jet distributions are reported for jet transverse momentum 15T,jet ch<50GeV/c and are compared in various intervals of p–Pb event activity, based on charged-particle multiplicity and zero-degree neutral energy in the forward (Pb-going) direction. The semi-inclusive observable is self-normalized and such comparisons do not require the interpretation of p–Pb event activity in terms of collision geometry, in contrast to inclusive jet observables. These measurements provide new constraints on the magnitude of jet quenching in small systems at the LHC. In p–Pb collisions with high event activity, the average medium-induced out-of-cone energy transport for jets with R=0.4 and 15T,jet ch<50GeV/c is measured to be less than 0.4 GeV/c at 90% confidence, which is over an order of magnitude smaller than a similar measurement for central Pb–Pb collisions at sNN=2.76TeV. Comparison is made to theoretical calculations of jet quenching in small systems, and to inclusive jet measurements in p–Pb collisions selected by event activity at the LHC and in d–Au collisions at RHIC.

AB - The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at sNN=5.02 TeV. Jets are reconstructed from charged-particle tracks using the anti-kT algorithm with resolution parameter R=0.2 and 0.4. A data-driven statistical approach is used to correct the uncorrelated background jet yield. Recoil jet distributions are reported for jet transverse momentum 15T,jet ch<50GeV/c and are compared in various intervals of p–Pb event activity, based on charged-particle multiplicity and zero-degree neutral energy in the forward (Pb-going) direction. The semi-inclusive observable is self-normalized and such comparisons do not require the interpretation of p–Pb event activity in terms of collision geometry, in contrast to inclusive jet observables. These measurements provide new constraints on the magnitude of jet quenching in small systems at the LHC. In p–Pb collisions with high event activity, the average medium-induced out-of-cone energy transport for jets with R=0.4 and 15T,jet ch<50GeV/c is measured to be less than 0.4 GeV/c at 90% confidence, which is over an order of magnitude smaller than a similar measurement for central Pb–Pb collisions at sNN=2.76TeV. Comparison is made to theoretical calculations of jet quenching in small systems, and to inclusive jet measurements in p–Pb collisions selected by event activity at the LHC and in d–Au collisions at RHIC.

U2 - 10.1016/j.physletb.2018.05.059

DO - 10.1016/j.physletb.2018.05.059

M3 - Journal article

SN - 0370-2693

VL - 783

SP - 95

EP - 113

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

ER -

Constraints on jet quenching in p-Pb collisions at root s(NN)=5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions

Abstract

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