Production of Λ and KS0 in jets in p–Pb collisions at sNN=5.02 TeV and pp collisions at s=7 TeV

ALICE Collaboration

doi:10.1016/j.physletb.2022.136984

Production of Λ and K_S⁰ in jets in p–Pb collisions at s_NN=5.02 TeV and pp collisions at s=7 TeV

ALICE Collaboration

Sección de Física

Variable Energy Cyclotron Centre
Czech Academy of Sciences
Goethe University Frankfurt
University of Lund
CERN
Sezione INFN
National Institute for Nuclear Physics
Aligarh Muslim University
Korea Institute of Science and Technology Information
Indonesian Institute of Sciences
Russian Research Centre Kurchatov Institute
GSI Helmholtzzentrum für Schwerionenforschung
Central China Normal University
Universidad Nacional Autónoma de México
COMSATS University Islamabad
University of Houston
University of Bergen
St. Petersburg State University
National Institute for Physics and Nuclear Engineering
National Institute for Subatomic Physics
University of Münster
Ruprecht-Karls-Universität Heidelberg
Lawrence Berkeley National Laboratory
Nantes Université
University of Oslo
Yale University
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN
Gangneung-Wonju National University
Indian Institute of Technology Indore
University of Jammu
Université Paris-Saclay Centre d’ Études de Saclay (CEA)
Rheinische Friedrich-Wilhelms-Universität Bonn
Bose Institute
Technical University of Munich
National and Kapodistrian University of Athens
Wigner Research Centre for Physics
STFC Daresbury Laboratory
Université Clermont Auvergne
University of Liverpool
Wayne State University
Joint Institute for Nuclear Research
Indian Institute of Technology Bombay
University of Copenhagen
Université de Strasbourg
Moscow Engineering Physics Institute
Petersburg Nuclear Physics Institute (PNPI)
Institute of Space Science (ISS)
Gauhati University
INFN, Laboratori Nazionali Di Frascati
Faculty of Nuclear Sciences and Physical Engineering
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
University of Texas at Austin
University of Pavia
Oak Ridge National Laboratory
Inha University
Pavol Jozef Šafárik University
Università di Brescia
Moscow Institute for Physics and Technology
Universidade de São Paulo
Polytechnic University of Bari
Russian Federal Nuclear Center (VNIIEF)
Austrian Academy of Sciences
University of Tsukuba
National Research Foundation
University of the Witwatersrand
Pontifical Catholic Univ. of Peru
Universidad Autonoma de Sinaloa
Benemérita Universidad Autónoma de Puebla
Homi Bhabha National Institute
Université de Lyon
Universidade Estadual de Campinas
University of Cape Town
University of Birmingham
Université Grenoble Alpes
Università del Piemonte Orientale and Gruppo Collegato INFN
Universidade Federal do ABC
Frankfurt Institute for Advanced Studies
Warsaw University of Technology
University of California at Berkeley
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
RAS - Institute for Nuclear Research
Panjab University
University of Zagreb
Institute for High Energy Physics
Chicago State University
National Nuclear Research Center
University of Kansas
Universidade Federal do Rio Grande do Sul
University of Split
Institute for Subatomic Physics of Utrecht University
A. Alikhanian Yerevan Institute of Physics
Tokyo University
Nagasaki Institute of Applied Science
Western Norway University of Applied Sciences
Centro de Investigación y de Estudios AVanzados (CINVESTAV)
Yonsei University
Creighton University
University of Tennessee
Ohio State University
Technical University of Košice
Slovak Academy of Sciences
KTO Karatay University
Zentrum für Technologietransfer und Telekommunikation (ZTT)
Pusan National University
University of Jyväskylä
Jeonbuk National University
Sejong University
California Polytechnic State University, San Luis Obispo
Suranaree University of Technology
AGH University of Krakow
National Centre for Nuclear Studies
University of South-Eastern Norway
China Institute of Atomic Energy
Fudan University
University of Messina
Institute of Physics of the Czech Academy of Sciences
Università degli Studi di Foggia
University of Rome La Sapienza
Comenius University
Chungbuk National University
Hiroshima University
Budker Institute for Nuclear Physics
University of Rajasthan
University of Helsinki
Eberhard Karls Universität Tübingen
Nara Women's University
University of Science and Technology of China
Bogolyubov Institute for Theoretical Physics Nasu

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The production of Λ baryons and K_S⁰ mesons (V⁰ particles) was measured in p–Pb collisions at s_NN=5.02 TeV and pp collisions at s=7 TeV with ALICE at the LHC. The production of these strange particles is studied separately for particles associated with hard scatterings and the underlying event to shed light on the baryon-to-meson ratio enhancement observed at intermediate transverse momentum (p_T) in high multiplicity pp and p–Pb collisions. Hard scatterings are selected on an event-by-event basis with jets reconstructed with the anti-k_T algorithm using charged particles. The production of strange particles associated with jets p_T,jet^ch>10 and p_T,jet^ch>20 GeV/c in p–Pb collisions, and with jet p_T,jet^ch>10 GeV/c in pp collisions is reported as a function of p_T. Its dependence on angular distance from the jet axis, R(V⁰,jet), for jets with p_T,jet^ch>10 GeV/c in p–Pb collisions is reported as well. The p_T-differential production spectra of strange particles associated with jets are found to be harder compared to that in the underlying event and both differ from the inclusive measurements. In events containing a jet, the density of the V⁰ particles in the underlying event is found to be larger than the density in the minimum bias events. The Λ/K_S⁰ ratio associated with jets in p–Pb collisions is consistent with the ratio in pp collisions and follows the expectation of jets fragmenting in vacuum. On the other hand, this ratio within jets is consistently lower than the one obtained in the underlying event and it does not show the characteristic enhancement of baryons at intermediate p_T often referred to as “baryon anomaly” in the inclusive measurements.

Original language	English
Article number	136984
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	827
DOIs	https://doi.org/10.1016/j.physletb.2022.136984
State	Published - 10 Apr 2022

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10.1016/j.physletb.2022.136984

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@article{ff19dc5fdf1345cab920740a91d9d76c,

title = "Production of Λ and KS0 in jets in p–Pb collisions at sNN=5.02 TeV and pp collisions at s=7 TeV",

abstract = "The production of Λ baryons and KS0 mesons (V0 particles) was measured in p–Pb collisions at sNN=5.02 TeV and pp collisions at s=7 TeV with ALICE at the LHC. The production of these strange particles is studied separately for particles associated with hard scatterings and the underlying event to shed light on the baryon-to-meson ratio enhancement observed at intermediate transverse momentum (pT) in high multiplicity pp and p–Pb collisions. Hard scatterings are selected on an event-by-event basis with jets reconstructed with the anti-kT algorithm using charged particles. The production of strange particles associated with jets pT,jetch>10 and pT,jetch>20 GeV/c in p–Pb collisions, and with jet pT,jetch>10 GeV/c in pp collisions is reported as a function of pT. Its dependence on angular distance from the jet axis, R(V0,jet), for jets with pT,jetch>10 GeV/c in p–Pb collisions is reported as well. The pT-differential production spectra of strange particles associated with jets are found to be harder compared to that in the underlying event and both differ from the inclusive measurements. In events containing a jet, the density of the V0 particles in the underlying event is found to be larger than the density in the minimum bias events. The Λ/KS0 ratio associated with jets in p–Pb collisions is consistent with the ratio in pp collisions and follows the expectation of jets fragmenting in vacuum. On the other hand, this ratio within jets is consistently lower than the one obtained in the underlying event and it does not show the characteristic enhancement of baryons at intermediate pT often referred to as “baryon anomaly” in the inclusive measurements.",

author = "\{ALICE Collaboration\} and S. Acharya and D. Adamov{\'a} and A. Adler and J. Adolfsson and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and S. Ahmad and Ahn, \{S. U.\} and Z. Akbar and A. Akindinov and M. Al-Turany and D. Aleksandrov and B. Alessandro and Alfanda, \{H. M.\} and \{Alfaro Molina\}, R. and B. Ali and Y. Ali and A. Alici and N. Alizadehvandchali and A. Alkin and J. Alme and T. Alt and L. Altenkamper and I. Altsybeev and Anaam, \{M. N.\} and C. Andrei and D. Andreou and A. Andronic and M. Angeletti and V. Anguelov and F. Antinori and P. Antonioli and C. Anuj and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and Arsene, \{I. C.\} and M. Arslandok and A. Augustinus and R. Averbeck and S. Aziz and Azmi, \{M. D.\} and A. Badal{\`a} and Baek, \{Y. W.\} and \{Bazo Alba\}, \{J. L.\} and Gago, \{A. M.\}",

note = "Publisher Copyright: {\textcopyright} 2022 European Organization for Nuclear Research, ALICE",

year = "2022",

month = apr,

day = "10",

doi = "10.1016/j.physletb.2022.136984",

language = "English",

volume = "827",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

}

TY - JOUR

T1 - Production of Λ and KS0 in jets in p–Pb collisions at sNN=5.02 TeV and pp collisions at s=7 TeV

AU - ALICE Collaboration

AU - Acharya, S.

AU - Adamová, D.

AU - Adler, A.

AU - Adolfsson, J.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, S.

AU - Ahn, S. U.

AU - Akbar, Z.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfanda, H. M.

AU - Alfaro Molina, R.

AU - Ali, B.

AU - Ali, Y.

AU - Alici, A.

AU - Alizadehvandchali, N.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altenkamper, L.

AU - Altsybeev, I.

AU - Anaam, M. N.

AU - Andrei, C.

AU - Andreou, D.

AU - Andronic, A.

AU - Angeletti, M.

AU - Anguelov, V.

AU - Antinori, F.

AU - Antonioli, P.

AU - Anuj, C.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Aziz, S.

AU - Azmi, M. D.

AU - Badalà, A.

AU - Baek, Y. W.

AU - Bazo Alba, J. L.

AU - Gago, A. M.

PY - 2022/4/10

Y1 - 2022/4/10

N2 - The production of Λ baryons and KS0 mesons (V0 particles) was measured in p–Pb collisions at sNN=5.02 TeV and pp collisions at s=7 TeV with ALICE at the LHC. The production of these strange particles is studied separately for particles associated with hard scatterings and the underlying event to shed light on the baryon-to-meson ratio enhancement observed at intermediate transverse momentum (pT) in high multiplicity pp and p–Pb collisions. Hard scatterings are selected on an event-by-event basis with jets reconstructed with the anti-kT algorithm using charged particles. The production of strange particles associated with jets pT,jetch>10 and pT,jetch>20 GeV/c in p–Pb collisions, and with jet pT,jetch>10 GeV/c in pp collisions is reported as a function of pT. Its dependence on angular distance from the jet axis, R(V0,jet), for jets with pT,jetch>10 GeV/c in p–Pb collisions is reported as well. The pT-differential production spectra of strange particles associated with jets are found to be harder compared to that in the underlying event and both differ from the inclusive measurements. In events containing a jet, the density of the V0 particles in the underlying event is found to be larger than the density in the minimum bias events. The Λ/KS0 ratio associated with jets in p–Pb collisions is consistent with the ratio in pp collisions and follows the expectation of jets fragmenting in vacuum. On the other hand, this ratio within jets is consistently lower than the one obtained in the underlying event and it does not show the characteristic enhancement of baryons at intermediate pT often referred to as “baryon anomaly” in the inclusive measurements.

AB - The production of Λ baryons and KS0 mesons (V0 particles) was measured in p–Pb collisions at sNN=5.02 TeV and pp collisions at s=7 TeV with ALICE at the LHC. The production of these strange particles is studied separately for particles associated with hard scatterings and the underlying event to shed light on the baryon-to-meson ratio enhancement observed at intermediate transverse momentum (pT) in high multiplicity pp and p–Pb collisions. Hard scatterings are selected on an event-by-event basis with jets reconstructed with the anti-kT algorithm using charged particles. The production of strange particles associated with jets pT,jetch>10 and pT,jetch>20 GeV/c in p–Pb collisions, and with jet pT,jetch>10 GeV/c in pp collisions is reported as a function of pT. Its dependence on angular distance from the jet axis, R(V0,jet), for jets with pT,jetch>10 GeV/c in p–Pb collisions is reported as well. The pT-differential production spectra of strange particles associated with jets are found to be harder compared to that in the underlying event and both differ from the inclusive measurements. In events containing a jet, the density of the V0 particles in the underlying event is found to be larger than the density in the minimum bias events. The Λ/KS0 ratio associated with jets in p–Pb collisions is consistent with the ratio in pp collisions and follows the expectation of jets fragmenting in vacuum. On the other hand, this ratio within jets is consistently lower than the one obtained in the underlying event and it does not show the characteristic enhancement of baryons at intermediate pT often referred to as “baryon anomaly” in the inclusive measurements.

UR - https://www.scopus.com/pages/publications/85125843993

U2 - 10.1016/j.physletb.2022.136984

DO - 10.1016/j.physletb.2022.136984

M3 - Article

AN - SCOPUS:85125843993

SN - 0370-2693

VL - 827

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 136984

ER -

Production of Λ and K_S⁰ in jets in p–Pb collisions at s_NN=5.02 TeV and pp collisions at s=7 TeV

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