First Measurement of the |𝑡| Dependence of Incoherent 𝐽/𝜓 Photonuclear Production

The ALICE Collaboration; S. Acharya; D. Adamová; Laura Maria Huhta; D. J. Kim; Yury Melikyan; Mikael Andreas Molander; C. Mordasini; A. Onnerstad; J. E. Parkkila; Heidi Maria Rytkönen; Sami Räsänen; Oskari Antti Matti Saarimäki; M. Slupecki; W. H. Trzaska; Maxim Mikael Olavi Virta

doi:10.1103/PhysRevLett.132.162302

First Measurement of the |𝑡| Dependence of Incoherent 𝐽/𝜓 Photonuclear Production

The ALICE Collaboration, S. Acharya, D. Adamová, Laura Maria Huhta, D. J. Kim, Yury Melikyan, Mikael Andreas Molander, C. Mordasini, A. Onnerstad, J. E. Parkkila, Heidi Maria Rytkönen, Sami Räsänen, Oskari Antti Matti Saarimäki, M. Slupecki, W. H. Trzaska, Maxim Mikael Olavi Virta

Helsinki Institute of Physics

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

Abstract

The first measurement of the cross section for incoherent photonuclear production of J=. vector mesons as a function of the Mandelstam jtj variable is presented. The measurement was carried out with the ALICE detector at midrapidity,vertical bar t vertical bar < 0.8, using ultraperipheral collisions of Pb nuclei at a center-of-mass energy per nucleon pair of root s NN 5.02 TeV. This rapidity interval corresponds to a Bjorken-x range o0.3-1.4 x 10(-3). Cross sections are given in five jtj intervals in the range 0.04 < vertical bar t vertical bar < 1 GeV2 and compared to the predictions by different models. Models that ignore quantum fluctuations of the gluon density in the colliding hadron predict a jtj dependence of the cross section much steeper than in data. The inclusion of such fluctuations in the same models provides a better description of the data.

Original language	English
Article number	162302
Journal	Physical Review Letters
Volume	132
Issue number	16
Number of pages	14
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.132.162302
Publication status	Published - 19 Apr 2024
MoE publication type	A1 Journal article-refereed

Fields of Science

114 Physical sciences

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10.1103/PhysRevLett.132.162302Licence: CC BY

PhysRevLett.132.162302Final published version, 16.2 MBLicence: CC BY

Cite this

The ALICE Collaboration, Acharya, S., Adamová, D., Huhta, L. M., Kim, D. J., Melikyan, Y., Molander, M. A., Mordasini, C., Onnerstad, A., Parkkila, J. E., Rytkönen, H. M., Räsänen, S., Saarimäki, O. A. M., Slupecki, M., Trzaska, W. H., & Virta, M. M. O. (2024). First Measurement of the |𝑡| Dependence of Incoherent 𝐽/𝜓 Photonuclear Production. Physical Review Letters, 132(16), Article 162302. https://doi.org/10.1103/PhysRevLett.132.162302

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title = "First Measurement of the |𝑡| Dependence of Incoherent 𝐽/𝜓 Photonuclear Production",

abstract = "The first measurement of the cross section for incoherent photonuclear production of J=. vector mesons as a function of the Mandelstam jtj variable is presented. The measurement was carried out with the ALICE detector at midrapidity,vertical bar t vertical bar < 0.8, using ultraperipheral collisions of Pb nuclei at a center-of-mass energy per nucleon pair of root s NN 5.02 TeV. This rapidity interval corresponds to a Bjorken-x range o0.3-1.4 x 10(-3). Cross sections are given in five jtj intervals in the range 0.04 < vertical bar t vertical bar < 1 GeV2 and compared to the predictions by different models. Models that ignore quantum fluctuations of the gluon density in the colliding hadron predict a jtj dependence of the cross section much steeper than in data. The inclusion of such fluctuations in the same models provides a better description of the data.",

keywords = "114 Physical sciences",

author = "\{The ALICE Collaboration\} and S. Acharya and D. Adamov{\'a} and Huhta, \{Laura Maria\} and Kim, \{D. J.\} and Yury Melikyan and Molander, \{Mikael Andreas\} and C. Mordasini and A. Onnerstad and Parkkila, \{J. E.\} and Rytk{\"o}nen, \{Heidi Maria\} and Sami R{\"a}s{\"a}nen and Saarim{\"a}ki, \{Oskari Antti Matti\} and M. Slupecki and Trzaska, \{W. H.\} and Virta, \{Maxim Mikael Olavi\}",

year = "2024",

month = apr,

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doi = "10.1103/PhysRevLett.132.162302",

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The ALICE Collaboration, Acharya, S, Adamová, D, Huhta, LM, Kim, DJ, Melikyan, Y , Molander, MA, Mordasini, C, Onnerstad, A, Parkkila, JE, Rytkönen, HM, Räsänen, S, Saarimäki, OAM, Slupecki, M, Trzaska, WH & Virta, MMO 2024, 'First Measurement of the |𝑡| Dependence of Incoherent 𝐽/𝜓 Photonuclear Production', Physical Review Letters, vol. 132, no. 16, 162302. https://doi.org/10.1103/PhysRevLett.132.162302

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T1 - First Measurement of the |𝑡| Dependence of Incoherent 𝐽/𝜓 Photonuclear Production

AU - The ALICE Collaboration

AU - Acharya, S.

AU - Adamová, D.

AU - Huhta, Laura Maria

AU - Kim, D. J.

AU - Melikyan, Yury

AU - Molander, Mikael Andreas

AU - Mordasini, C.

AU - Onnerstad, A.

AU - Parkkila, J. E.

AU - Rytkönen, Heidi Maria

AU - Räsänen, Sami

AU - Saarimäki, Oskari Antti Matti

AU - Slupecki, M.

AU - Trzaska, W. H.

AU - Virta, Maxim Mikael Olavi

PY - 2024/4/19

Y1 - 2024/4/19

N2 - The first measurement of the cross section for incoherent photonuclear production of J=. vector mesons as a function of the Mandelstam jtj variable is presented. The measurement was carried out with the ALICE detector at midrapidity,vertical bar t vertical bar < 0.8, using ultraperipheral collisions of Pb nuclei at a center-of-mass energy per nucleon pair of root s NN 5.02 TeV. This rapidity interval corresponds to a Bjorken-x range o0.3-1.4 x 10(-3). Cross sections are given in five jtj intervals in the range 0.04 < vertical bar t vertical bar < 1 GeV2 and compared to the predictions by different models. Models that ignore quantum fluctuations of the gluon density in the colliding hadron predict a jtj dependence of the cross section much steeper than in data. The inclusion of such fluctuations in the same models provides a better description of the data.

AB - The first measurement of the cross section for incoherent photonuclear production of J=. vector mesons as a function of the Mandelstam jtj variable is presented. The measurement was carried out with the ALICE detector at midrapidity,vertical bar t vertical bar < 0.8, using ultraperipheral collisions of Pb nuclei at a center-of-mass energy per nucleon pair of root s NN 5.02 TeV. This rapidity interval corresponds to a Bjorken-x range o0.3-1.4 x 10(-3). Cross sections are given in five jtj intervals in the range 0.04 < vertical bar t vertical bar < 1 GeV2 and compared to the predictions by different models. Models that ignore quantum fluctuations of the gluon density in the colliding hadron predict a jtj dependence of the cross section much steeper than in data. The inclusion of such fluctuations in the same models provides a better description of the data.

KW - 114 Physical sciences

U2 - 10.1103/PhysRevLett.132.162302

DO - 10.1103/PhysRevLett.132.162302

M3 - Article

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JO - Physical Review Letters

JF - Physical Review Letters

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