Measurement of jet fragmentation in 5.02 TeV proton–lead and proton–proton collisions with the ATLAS detector

doi:10.1016/j.nuclphysa.2018.07.006

Nuclear Physics A

Volume 978, October 2018, Pages 65-106

https://doi.org/10.1016/j.nuclphysa.2018.07.006 Get rights and content

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Abstract

A measurement of the fragmentation functions of jets into charged particles in $p + Pb$ collisions and pp collisions is presented. The analysis utilizes 28 nb⁻¹ of $p + Pb$ data and 26 pb⁻¹ of pp data, both at $\sqrt{s_{NN}}$ = 5.02 TeV, collected in 2013 and 2015, respectively, with the ATLAS detector at the LHC. The measurement is reported in the centre-of-mass frame of the nucleon–nucleon system for jets in the rapidity range $| y^{⁎} | <$ 1.6 and with transverse momentum 45 $< p_{T} <$ 260 GeV. Results are presented both as a function of the charged-particle transverse momentum and as a function of the longitudinal momentum fraction of the particle with respect to the jet. The pp fragmentation functions are compared with results from Monte Carlo event generators and two theoretical models. The ratios of the $p + Pb$ to pp fragmentation functions are found to be consistent with unity.

Keywords

Relativistic heavy-ion collisions

Jets

Fragmentation into hadrons

Cited by (0)

^a: Also at Department of Physics, King's College London, London, United Kingdom.

^b: Also at Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan.

^c: Also at Novosibirsk State University, Novosibirsk, Russia.

^d: Also at TRIUMF, Vancouver, BC, Canada.

^e: Also at Department of Physics & Astronomy, University of Louisville, Louisville, KY, United States of America.

^f: Also at Physics Department, An-Najah National University, Nablus, Palestine.

^g: Also at Department of Physics, California State University, Fresno, CA, United States of America.

^h: Also at Department of Physics, University of Fribourg, Fribourg, Switzerland.

ⁱ: Also at II Physikalisches Institut, Georg-August-Universität, Göttingen, Germany.

^j: Also at Departament de Fisica de la Universitat Autonoma de Barcelona, Barcelona, Spain.

^k: Also at Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Portugal.

^l: Also at Tomsk State University, Tomsk, Russia.

^m: Also at The Collaborative Innovation Center of Quantum Matter (CICQM), Beijing, China.

ⁿ: Also at Universita di Napoli Parthenope, Napoli, Italy.

^o: Also at Institute of Particle Physics (IPP), Canada.

^p: Also at Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania.

^q: Also at Department of Physics, St. Petersburg State Polytechnical University, St. Petersburg, Russia.

^r: Also at Borough of Manhattan Community College, City University of New York, New York City, United States of America.

^s: Also at Department of Physics, The University of Michigan, Ann Arbor, MI, United States of America.

^t: Also at Department of Financial and Management Engineering, University of the Aegean, Chios, Greece.

^u: Also at Centre for High Performance Computing, CSIR Campus, Rosebank, Cape Town, South Africa.

^v: Also at Louisiana Tech University, Ruston, LA, United States of America.

^w: Also at Institucio Catalana de Recerca i Estudis Avancats, ICREA, Barcelona, Spain.

^x: Also at Graduate School of Science, Osaka University, Osaka, Japan.

^y: Also at Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg, Germany.

^z: Also at Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, Netherlands.

^aa: Also at Department of Physics, The University of Texas at Austin, Austin, TX, United States of America.

^ab: Also at Institute of Theoretical Physics, Ilia State University, Tbilisi, Georgia.

^ac: Also at CERN, Geneva, Switzerland.

^ad: Also at Georgian Technical University (GTU), Tbilisi, Georgia.

^ae: Also at Ochadai Academic Production, Ochanomizu University, Tokyo, Japan.

^af: Also at Manhattan College, New York, NY, United States of America.

^ag: Also at Departamento de Física, Pontificia Universidad Católica de Chile, Santiago, Chile.

^ah: Also at Academia Sinica Grid Computing, Institute of Physics, Academia Sinica, Taipei, Taiwan.

^ai: Also at The City College of New York, New York, NY, United States of America.

^aj: Also at School of Physics, Shandong University, Shandong, China.

^ak: Also at Departamento de Fisica Teorica y del Cosmos and CAFPE, Universidad de Granada, Granada, Spain.

^al: Also at Department of Physics, California State University, Sacramento, CA, United States of America.

^am: Also at Moscow Institute of Physics and Technology State University, Dolgoprudny, Russia.

^an: Also at Departement de Physique Nucleaire et Corpusculaire, Université de Genève, Geneva, Switzerland.

^ao: Also at Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Barcelona, Spain.

^ap: Also at School of Physics, Sun Yat-sen University, Guangzhou, China.

^aq: Also at Institute for Nuclear Research and Nuclear Energy (INRNE) of the Bulgarian Academy of Sciences, Sofia, Bulgaria.

^ar: Also at Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia.

^as: Also at Institute of Physics, Academia Sinica, Taipei, Taiwan.

^at: Also at National Research Nuclear University MEPhI, Moscow, Russia.

^au: Also at Department of Physics, Stanford University, Stanford, CA, United States of America.

^av: Also at Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, Hungary.

^aw: Also at Giresun University, Faculty of Engineering, Turkey.

^ax: Also at CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.

^ay: Also at Department of Physics, Nanjing University, Jiangsu, China.

^az: Also at University of Malaya, Department of Physics, Kuala Lumpur, Malaysia.

^ba: Also at LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France.

^⁎: Deceased.

^⋆: E-mail address: [email protected].