Measurement of the Centrality Dependence of the Dijet Yield in 𝑝+Pb Collisions at √𝑠NN =8.16  TeV with the ATLAS Detector

ATLAS Collaboration; S. Alderweireldt; J.F. Allen; T.M. Carter; D. Duda; S. M. Farrington; J.M. Gargan; R.Y. Gonzalez Andana; C. Leonidopoulos; V. J.  Martin; L. Mijović; V.A. Parrish; T. Qiu; E.P. Takeva; E.M. Villhauer; B.M. Wynne; Z. Xu; E. Zaid

doi:10.1103/PhysRevLett.132.102301

Measurement of the Centrality Dependence of the Dijet Yield in 𝑝+Pb Collisions at √𝑠NN =8.16 TeV with the ATLAS Detector

ATLAS Collaboration, S. Alderweireldt, J.F. Allen, T.M. Carter, D. Duda, S. M. Farrington, J.M. Gargan, R.Y. Gonzalez Andana, C. Leonidopoulos, V. J. Martin, L. Mijović, V.A. Parrish, T. Qiu, E.P. Takeva, E.M. Villhauer, B.M. Wynne, Z. Xu, E. Zaid

School of Physics and Astronomy

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

Abstract

ATLAS measured the centrality dependence of the dijet yield using 165 nb−1 of 𝑝+Pb data collected at √𝑠NN =8.16 TeV in 2016. The event centrality, which reflects the 𝑝 +Pb impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, 𝑅CP, is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The 𝑅CP shows a scaling with the Bjorken 𝑥 of the parton originating from the proton, 𝑥𝑝, while no such trend is observed as a function of 𝑥Pb. This analysis provides unique input to understanding the role of small proton spatial configurations in 𝑝 +Pb collisions by covering parton momentum fractions from the valence region down to 𝑥𝑝 ∼10−3 and 𝑥Pb ∼4 ×10−4.

Original language	English
Article number	102301
Pages (from-to)	1-22
Number of pages	22
Journal	Physical Review Letters
Volume	132
Issue number	10
Early online date	7 Mar 2024
DOIs	https://doi.org/10.1103/PhysRevLett.132.102301
Publication status	Published - 8 Mar 2024

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3 Finished
3 Active

Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/10/22 → 31/03/26
Project: Research

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ATLAS Collaboration, Alderweireldt, S., Allen, J. F., Carter, T. M., Duda, D., Farrington, S. M., Gargan, J. M., Gonzalez Andana, R. Y., Leonidopoulos, C., Martin, V. J., Mijović, L., Parrish, V. A., Qiu, T., Takeva, E. P., Villhauer, E. M., Wynne, B. M., Xu, Z., & Zaid, E. (2024). Measurement of the Centrality Dependence of the Dijet Yield in 𝑝+Pb Collisions at √𝑠NN =8.16 TeV with the ATLAS Detector. Physical Review Letters, 132(10), 1-22. Article 102301. https://doi.org/10.1103/PhysRevLett.132.102301

@article{04203bfedf1c4dc2bfb4bc10d61b915f,

title = "Measurement of the Centrality Dependence of the Dijet Yield in 𝑝+Pb Collisions at √𝑠NN =8.16 TeV with the ATLAS Detector",

abstract = "ATLAS measured the centrality dependence of the dijet yield using 165 nb−1 of 𝑝+Pb data collected at √𝑠NN =8.16 TeV in 2016. The event centrality, which reflects the 𝑝 +Pb impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, 𝑅CP, is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The 𝑅CP shows a scaling with the Bjorken 𝑥 of the parton originating from the proton, 𝑥𝑝, while no such trend is observed as a function of 𝑥Pb. This analysis provides unique input to understanding the role of small proton spatial configurations in 𝑝 +Pb collisions by covering parton momentum fractions from the valence region down to 𝑥𝑝 ∼10−3 and 𝑥Pb ∼4 ×10−4.",

author = "{ATLAS Collaboration} and S. Alderweireldt and J.F. Allen and T.M. Carter and D. Duda and Farrington, {S. M.} and J.M. Gargan and {Gonzalez Andana}, R.Y. and C. Leonidopoulos and Martin, {V. J.} and L. Mijovi{\'c} and V.A. Parrish and T. Qiu and E.P. Takeva and E.M. Villhauer and B.M. Wynne and Z. Xu and E. Zaid",

year = "2024",

month = mar,

day = "8",

doi = "10.1103/PhysRevLett.132.102301",

language = "English",

volume = "132",

pages = "1--22",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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ATLAS Collaboration, Alderweireldt, S, Allen, JF, Carter, TM, Duda, D , Farrington, SM, Gargan, JM, Gonzalez Andana, RY, Leonidopoulos, C , Martin, VJ , Mijović, L, Parrish, VA, Qiu, T, Takeva, EP, Villhauer, EM, Wynne, BM , Xu, Z & Zaid, E 2024, 'Measurement of the Centrality Dependence of the Dijet Yield in 𝑝+Pb Collisions at √𝑠NN =8.16 TeV with the ATLAS Detector', Physical Review Letters, vol. 132, no. 10, 102301, pp. 1-22. https://doi.org/10.1103/PhysRevLett.132.102301

TY - JOUR

T1 - Measurement of the Centrality Dependence of the Dijet Yield in 𝑝+Pb Collisions at √𝑠NN =8.16 TeV with the ATLAS Detector

AU - ATLAS Collaboration

AU - Alderweireldt, S.

AU - Allen, J.F.

AU - Carter, T.M.

AU - Duda, D.

AU - Farrington, S. M.

AU - Gargan, J.M.

AU - Gonzalez Andana, R.Y.

AU - Leonidopoulos, C.

AU - Martin, V. J.

AU - Mijović, L.

AU - Parrish, V.A.

AU - Qiu, T.

AU - Takeva, E.P.

AU - Villhauer, E.M.

AU - Wynne, B.M.

AU - Xu, Z.

AU - Zaid, E.

PY - 2024/3/8

Y1 - 2024/3/8

N2 - ATLAS measured the centrality dependence of the dijet yield using 165 nb−1 of 𝑝+Pb data collected at √𝑠NN =8.16 TeV in 2016. The event centrality, which reflects the 𝑝 +Pb impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, 𝑅CP, is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The 𝑅CP shows a scaling with the Bjorken 𝑥 of the parton originating from the proton, 𝑥𝑝, while no such trend is observed as a function of 𝑥Pb. This analysis provides unique input to understanding the role of small proton spatial configurations in 𝑝 +Pb collisions by covering parton momentum fractions from the valence region down to 𝑥𝑝 ∼10−3 and 𝑥Pb ∼4 ×10−4.

AB - ATLAS measured the centrality dependence of the dijet yield using 165 nb−1 of 𝑝+Pb data collected at √𝑠NN =8.16 TeV in 2016. The event centrality, which reflects the 𝑝 +Pb impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, 𝑅CP, is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The 𝑅CP shows a scaling with the Bjorken 𝑥 of the parton originating from the proton, 𝑥𝑝, while no such trend is observed as a function of 𝑥Pb. This analysis provides unique input to understanding the role of small proton spatial configurations in 𝑝 +Pb collisions by covering parton momentum fractions from the valence region down to 𝑥𝑝 ∼10−3 and 𝑥Pb ∼4 ×10−4.

U2 - 10.1103/PhysRevLett.132.102301

DO - 10.1103/PhysRevLett.132.102301

M3 - Article

SN - 0031-9007

VL - 132

SP - 1

EP - 22

JO - Physical Review Letters

JF - Physical Review Letters

IS - 10

M1 - 102301

ER -

Measurement of the Centrality Dependence of the Dijet Yield in 𝑝+Pb Collisions at √𝑠NN =8.16 TeV with the ATLAS Detector

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Experimental Particle Physics at the University of Edinburgh

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Cite this