Charged jet cross sections and properties in proton-proton collisions at root s=7 TeV

ALICE Collaboration

doi:10.1103/PhysRevD.91.112012

Charged jet cross sections and properties in proton-proton collisions at root s=7 TeV

ALICE Collaboration

Dept of Physics

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

Abstract

The differential charged jet cross sections, jet fragmentation distributions, and jet shapes are measured in minimum bias proton-proton collisions at center-of-mass energy root s = 7 TeV using the ALICE detector at the LHC. Jets are reconstructed from charged particle momenta in the midrapidity region using the sequential recombination k(T) and anti-k(T) as well as the SISCone jet finding algorithms with several resolution parameters in the range R = 0.2-0.6. Differential jet production cross sections measured with the three jet finders are in agreement in the transverse momentum (p(T)) interval 20 <p(T)(jet,ch) <100 GeV/c. They are also consistent with prior measurements carried out at the LHC by the ATLAS Collaboration. The jet charged particle multiplicity rises monotonically with increasing jet p(T), in qualitative agreement with prior observations at lower energies. The transverse profiles of leading jets are investigated using radial momentum density distributions as well as distributions of the average radius containing 80% (<R-80 >) of the reconstructed jet p(T). The fragmentation of leading jets with R = 0.4 using scaled p(T) spectra of the jet constituents is studied. The measurements are compared to model calculations from event generators (PYTHIA, PHOJET, HERWIG). The measured radial density distributions and <R-80 > distributions are well described by the PYTHIA model (tune Perugia-2011). The fragmentation distributions are better described by HERWIG.

Original language	English
Article number	112012
Number of pages	33
Journal	Physical Review. D, Particles, Fields, Gravitation and Cosmology
Volume	91
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.91.112012
Publication status	Published - 22 Jun 2015

Funding

The ALICE Collaboration would like to thank all its engineers and technicians for their invaluable contributions to the construction of the experiment and the CERN accelerator teams for the outstanding performance of the LHC complex. The ALICE Collaboration gratefully acknowledges the resources and support provided by all Grid centers and the Worldwide LHC Computing Grid (WLCG) Collaboration. The ALICE Collaboration acknowledges the following funding agencies for their support in building and running the ALICE detector: State Committee of Science, World Federation of Scientists (WFS) and Swiss Fonds Kidagan, Armenia, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Financiadora de Estudos e Projetos (FINEP), Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); National Natural Science Foundation of China (NSFC), the Chinese Ministry of Education (CMOE) and the Ministry of Science and Technology of China (MSTC); Ministry of Education and Youth of the Czech Republic; Danish Natural Science Research Council, the Carlsberg Foundation and the Danish National Research Foundation; The European Research Council under the European Community's Seventh Framework Programme; Helsinki Institute of Physics and the Academy of Finland; French CNRS-IN2P3, the "Region Pays de Loire," "Region Alsace," "Region Auvergne" and CEA, France; German BMBF and the Helmholtz Association; General Secretariat for Research and Technology, Ministry of Development, Greece; Hungarian OTKA and National Office for Research and Technology (NKTH); Department of Atomic Energy and Department of Science and Technology of the Government of India; Istituto Nazionale di Fisica Nucleare (INFN) and Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Italy; MEXT Grant-in-Aid for Specially Promoted Research, Japan; Joint Institute for Nuclear Research, Dubna; National Research Foundation of Korea (NRF); CONACYT, DGAPA, Mexico, ALFA-EC and the EPLANET Program (European Particle Physics Latin American Network) Stichting voor Fundamenteel Onderzoek der Materie (FOM) and the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; Research Council of Norway (NFR); Polish Ministry of Science and Higher Education; National Science Centre, Poland; Ministry of National Education/Institute for Atomic Physics and CNCS-UEFISCDI-Romania; Ministry of Education and Science of Russian Federation, Russian Academy of Sciences, Russian Federal Agency of Atomic Energy, Russian Federal Agency for Science and Innovations and The Russian Foundation for Basic Research; Ministry of Education of Slovakia; Department of Science and Technology, South Africa; CIEMAT, EELA, Ministerio de Economia y Competitividad (MINECO) of Spain, Xunta de Galicia (Conselleria de Educacion), CEADEN, Cubaenergia, Cuba, and IAEA (International Atomic Energy Agency); Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW); Ukraine Ministry of Education and Science; United Kingdom Science and Technology Facilities Council (STFC); The United States Department of Energy, the United States National Science Foundation, the State of Texas, and the State of Ohio; Ministry of Science, Education and Sports of Croatia and Unity through Knowledge Fund, Croatia.

Keywords

(P)OVER-BAR-P COLLISIONS
PARTON DISTRIBUTIONS
TRANSVERSE-MOMENTUM
ROOT-S(NN)=2.76 TEV
HADRON-COLLISIONS
ATLAS DETECTOR
PP COLLISIONS
FRAGMENTATION
SHAPES
ENERGY

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title = "Charged jet cross sections and properties in proton-proton collisions at root s=7 TeV",

abstract = "The differential charged jet cross sections, jet fragmentation distributions, and jet shapes are measured in minimum bias proton-proton collisions at center-of-mass energy root s = 7 TeV using the ALICE detector at the LHC. Jets are reconstructed from charged particle momenta in the midrapidity region using the sequential recombination k(T) and anti-k(T) as well as the SISCone jet finding algorithms with several resolution parameters in the range R = 0.2-0.6. Differential jet production cross sections measured with the three jet finders are in agreement in the transverse momentum (p(T)) interval 20 ) of the reconstructed jet p(T). The fragmentation of leading jets with R = 0.4 using scaled p(T) spectra of the jet constituents is studied. The measurements are compared to model calculations from event generators (PYTHIA, PHOJET, HERWIG). The measured radial density distributions and distributions are well described by the PYTHIA model (tune Perugia-2011). The fragmentation distributions are better described by HERWIG.",

keywords = "(P)OVER-BAR-P COLLISIONS, PARTON DISTRIBUTIONS, TRANSVERSE-MOMENTUM, ROOT-S(NN)=2.76 TEV, HADRON-COLLISIONS, ATLAS DETECTOR, PP COLLISIONS, FRAGMENTATION, SHAPES, ENERGY",

author = "\{ALICE Collaboration\} and B. Abelev and J. Adam and D. Adamova and Aggarwal, \{M. M.\} and Rinella, \{G. Aglieri\} and S. Basu and Bertens, \{R. A.\} and C. Bianchin and S. Bjelogrlic and M. Botje and A. Caliva and M. Chojnacki and P. Christakoglou and T. Chujo and Chung, \{S. U.\} and D. Das and \{de Rooij\}, R. and A. Dobrin and A. Dubla and A. Grelli and R. Gupta and Keijdener, \{D. L. D.\} and Khan, \{M. M.\} and M. Krzewicki and Kuijer, \{P. G.\} and \{La Pointe\}, \{S. L.\} and E. Leogrande and Lodato, \{D. F.\} and G. Luparello and A. Mischke and N. Mohammadi and S. Muhuri and G. Nooren and \{Da Silva\}, \{A. C. Oliveira\} and T. Peitzmann and N. Poljak and S. Rajput and M. Reicher and E. Rocco and Manso, \{A. Rodriguez\} and Snellings, \{R. J. M.\} and D. Thomas and \{Van Der Maarel\}, J. and M. Veldhoen and M. Verweij and M. Wang and H. Yang and P. Yang and F. Zhou and Y. Zhou",

year = "2015",

month = jun,

day = "22",

doi = "10.1103/PhysRevD.91.112012",

language = "English",

volume = "91",

journal = "Physical Review. D, Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

publisher = "American Physical Society",

number = "11",

}

TY - JOUR

T1 - Charged jet cross sections and properties in proton-proton collisions at root s=7 TeV

AU - ALICE Collaboration

AU - Abelev, B.

AU - Adam, J.

AU - Adamova, D.

AU - Aggarwal, M. M.

AU - Rinella, G. Aglieri

AU - Basu, S.

AU - Bertens, R. A.

AU - Bianchin, C.

AU - Bjelogrlic, S.

AU - Botje, M.

AU - Caliva, A.

AU - Chojnacki, M.

AU - Christakoglou, P.

AU - Chujo, T.

AU - Chung, S. U.

AU - Das, D.

AU - de Rooij, R.

AU - Dobrin, A.

AU - Dubla, A.

AU - Grelli, A.

AU - Gupta, R.

AU - Keijdener, D. L. D.

AU - Khan, M. M.

AU - Krzewicki, M.

AU - Kuijer, P. G.

AU - La Pointe, S. L.

AU - Leogrande, E.

AU - Lodato, D. F.

AU - Luparello, G.

AU - Mischke, A.

AU - Mohammadi, N.

AU - Muhuri, S.

AU - Nooren, G.

AU - Da Silva, A. C. Oliveira

AU - Peitzmann, T.

AU - Poljak, N.

AU - Rajput, S.

AU - Reicher, M.

AU - Rocco, E.

AU - Manso, A. Rodriguez

AU - Snellings, R. J. M.

AU - Thomas, D.

AU - Van Der Maarel, J.

AU - Veldhoen, M.

AU - Verweij, M.

AU - Wang, M.

AU - Yang, H.

AU - Yang, P.

AU - Zhou, F.

AU - Zhou, Y.

PY - 2015/6/22

Y1 - 2015/6/22

N2 - The differential charged jet cross sections, jet fragmentation distributions, and jet shapes are measured in minimum bias proton-proton collisions at center-of-mass energy root s = 7 TeV using the ALICE detector at the LHC. Jets are reconstructed from charged particle momenta in the midrapidity region using the sequential recombination k(T) and anti-k(T) as well as the SISCone jet finding algorithms with several resolution parameters in the range R = 0.2-0.6. Differential jet production cross sections measured with the three jet finders are in agreement in the transverse momentum (p(T)) interval 20 ) of the reconstructed jet p(T). The fragmentation of leading jets with R = 0.4 using scaled p(T) spectra of the jet constituents is studied. The measurements are compared to model calculations from event generators (PYTHIA, PHOJET, HERWIG). The measured radial density distributions and distributions are well described by the PYTHIA model (tune Perugia-2011). The fragmentation distributions are better described by HERWIG.

AB - The differential charged jet cross sections, jet fragmentation distributions, and jet shapes are measured in minimum bias proton-proton collisions at center-of-mass energy root s = 7 TeV using the ALICE detector at the LHC. Jets are reconstructed from charged particle momenta in the midrapidity region using the sequential recombination k(T) and anti-k(T) as well as the SISCone jet finding algorithms with several resolution parameters in the range R = 0.2-0.6. Differential jet production cross sections measured with the three jet finders are in agreement in the transverse momentum (p(T)) interval 20 ) of the reconstructed jet p(T). The fragmentation of leading jets with R = 0.4 using scaled p(T) spectra of the jet constituents is studied. The measurements are compared to model calculations from event generators (PYTHIA, PHOJET, HERWIG). The measured radial density distributions and distributions are well described by the PYTHIA model (tune Perugia-2011). The fragmentation distributions are better described by HERWIG.

KW - (P)OVER-BAR-P COLLISIONS

KW - PARTON DISTRIBUTIONS

KW - TRANSVERSE-MOMENTUM

KW - ROOT-S(NN)=2.76 TEV

KW - HADRON-COLLISIONS

KW - ATLAS DETECTOR

KW - PP COLLISIONS

KW - FRAGMENTATION

KW - SHAPES

KW - ENERGY

U2 - 10.1103/PhysRevD.91.112012

DO - 10.1103/PhysRevD.91.112012

M3 - Article

SN - 1550-7998

VL - 91

JO - Physical Review. D, Particles, Fields, Gravitation and Cosmology

JF - Physical Review. D, Particles, Fields, Gravitation and Cosmology

IS - 11

M1 - 112012

ER -

Charged jet cross sections and properties in proton-proton collisions at root s=7 TeV

Abstract

Funding

Keywords

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