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Probing Gluon Fluctuations in Nuclei with the First Energy-Dependent Measurement of Incoherent J/ψ Photoproduction in Ultraperipheral PbPb Collisions.

Publication ,  Journal Article
Chekhovsky, V; Hayrapetyan, A; Makarenko, V; Tumasyan, A; Adam, W; Andrejkovic, JW; Benato, L; Bergauer, T; Chatterjee, S; Damanakis, K; Li, A ...
Published in: Phys Rev Lett
September 12, 2025

Incoherent J/ψ photoproduction in heavy ion ultraperipheral collisions (UPCs) provides a sensitive probe of localized, fluctuating gluonic structures within heavy nuclei. This Letter reports the first measurement of the photon-nucleon center-of-mass energy (W_{γN}) dependence of this process in PbPb UPCs at a nucleon-nucleon center-of-mass energy of 5.02 TeV, using 1.52  nb^{-1} of data recorded by the CMS experiment. The measurement covers a wide W_{γN} range of ≈40-400  GeV, probing gluons carrying a fraction x of nucleon momentum down to an unexplored regime of 6.5×10^{-5}. Compared to baseline predictions neglecting nuclear effects, the measured cross sections exhibit significantly greater suppression at lower x. Additionally, the ratio of incoherent to coherent photoproduction is found to be constant across the probed W_{γN} and x range, disfavoring the establishment of the black disk limit. This Letter provides critical insights into the x-dependent evolution of fluctuating gluonic structures within nuclei and calls for further advancements in theoretical models incorporating nuclear shadowing and gluon saturation.

Duke Scholars

Published In

Phys Rev Lett

DOI

EISSN

1079-7114

Publication Date

September 12, 2025

Volume

135

Issue

11

Start / End Page

112301

Location

United States

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J. W., … Kutzner, V. (2025). Probing Gluon Fluctuations in Nuclei with the First Energy-Dependent Measurement of Incoherent J/ψ Photoproduction in Ultraperipheral PbPb Collisions. Phys Rev Lett, 135(11), 112301. https://doi.org/10.1103/w9kp-f8xr
Chekhovsky, V., A. Hayrapetyan, V. Makarenko, A. Tumasyan, W. Adam, J. W. Andrejkovic, L. Benato, et al. “Probing Gluon Fluctuations in Nuclei with the First Energy-Dependent Measurement of Incoherent J/ψ Photoproduction in Ultraperipheral PbPb Collisions.Phys Rev Lett 135, no. 11 (September 12, 2025): 112301. https://doi.org/10.1103/w9kp-f8xr.
Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, et al. Probing Gluon Fluctuations in Nuclei with the First Energy-Dependent Measurement of Incoherent J/ψ Photoproduction in Ultraperipheral PbPb Collisions. Phys Rev Lett. 2025 Sep 12;135(11):112301.
Chekhovsky, V., et al. “Probing Gluon Fluctuations in Nuclei with the First Energy-Dependent Measurement of Incoherent J/ψ Photoproduction in Ultraperipheral PbPb Collisions.Phys Rev Lett, vol. 135, no. 11, Sept. 2025, p. 112301. Pubmed, doi:10.1103/w9kp-f8xr.
Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, D’Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Lee K, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, 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De Oliveira A, Deng S, Guo B, Jiang C, Levin A, Li C, Li Q, Mao Y, Qian S, Qian SJ, Qin X, Sun X, Wang D, Yang H, Zhao Y, Zhou C, Yang S, Ye Z, You Z, Jaffel K, Lu N, Bauer G, Li B, Wang H, Yi K, Zhang J, Li Y, Lin Z, Lu C, Xiao M, Avila C, Barbosa Trujillo DA, Cabrera A, Florez C, Fraga J, Reyes Vega JA, Jaramillo J, Rendón C, Rodriguez M, Ruales Barbosa AA, Ruiz Alvarez JD, Giljanovic D, Godinovic N, Lelas D, Sculac A, Kovac M, Petkovic A, Sculac T, Bargassa P, Brigljevic V, Chitroda BK, Ferencek D, Jakovcic K, Starodumov A, Susa T, Attikis A, Christoforou K, Hadjiagapiou A, Leonidou C, Mousa J, Nicolaou C, Paizanos L, Ptochos F, Razis PA, Rykaczewski H, Saka H, Stepennov A, Finger M, Kveton A, Ayala E, Carrera Jarrin E, Aly R, Assran Y, Elgammal S, Abdullah Al-Mashad M, Mahmoud MA, Ehataht K, Kadastik M, Lange T, Nielsen C, Pata J, Raidal M, Tani L, Veelken C, Osterberg K, Voutilainen M, Bin Norjoharuddeen N, Brücken E, Garcia F, Inkaew P, Kallonen KTS, Lampén T, Lassila-Perini K, 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C, Grenier G, Ille B, Jourd’huy E, Laktineh IB, Lethuillier M, Mirabito L, Perries S, Purohit A, Vander Donckt M, Verdier P, Xiao J, Lomidze I, Toriashvili T, Tsamalaidze Z, Botta V, Consuegra Rodríguez S, Feld L, Klein K, Lipinski M, Meuser D, Pauls A, Pérez Adán D, Röwert N, Teroerde M, Diekmann S, Dodonova A, Eich N, Eliseev D, Engelke F, Erdmann J, Erdmann M, Fischer B, Hebbeker T, Hoepfner K, Ivone F, Jung A, Lee MY, Mausolf F, Merschmeyer M, Meyer A, Mukherjee S, Nowotny F, Pozdnyakov A, Rath Y, Redjeb W, Rehm F, Reithler H, Sarkisovi V, Schmidt A, Seth C, Sharma A, Spah JL, Torres Da Silva De Araujo F, Wiedenbeck S, Zaleski S, Dziwok C, Flügge G, Kress T, Nowack A, Pooth O, Stahl A, Ziemons T, Zotz A, Aarup Petersen H, Aldaya Martin M, Alimena J, Amoroso S, An Y, Bach J, Baxter S, Bayatmakou M, Becerril Gonzalez H, Behnke O, Belvedere A, Blekman F, Borras K, Campbell A, Cardini A, Colombina F, De Silva M, Eckerlin G, Eckstein D, Estevez Banos LI, Gallo E, Geiser A, Guglielmi V, Guthoff M, Hinzmann A, Jeppe L, Kaech B, Kasemann M, Kleinwort C, Kogler R, Komm M, Krücker D, Lange W, Leyva Pernia D, Lipka K, Lohmann W, Lorkowski F, Mankel R, Melzer-Pellmann I-A, Mendizabal Morentin M, Meyer AB, Milella G, Moral Figueroa K, Mussgiller A, Nair LP, Niedziela J, Nürnberg A, Park J, Ranken E, Raspereza A, Rastorguev D, Rübenach J, Rygaard L, Scham M, Schnake S, Schütze P, Schwanenberger C, Selivanova D, Sharko K, Shchedrolosiev M, Stafford D, Vazzoler F, Ventura Barroso A, Walsh R, Wang Q, Wichmann K, Wiens L, Wissing C, Yang Y, Zakharov S, Zimermmane Castro Santos A, Albrecht A, Albrecht S, Antonello M, Bollweg S, Bonanomi M, Connor P, El Morabit K, Fischer Y, Garutti E, Grohsjean A, Haller J, Hundhausen D, Jabusch HR, Kasieczka G, Keicher P, Klanner R, Korcari W, Kramer T, Kuo CC, Kutzner V. Probing Gluon Fluctuations in Nuclei with the First Energy-Dependent Measurement of Incoherent J/ψ Photoproduction in Ultraperipheral PbPb Collisions. Phys Rev Lett. 2025 Sep 12;135(11):112301.

Published In

Phys Rev Lett

DOI

EISSN

1079-7114

Publication Date

September 12, 2025

Volume

135

Issue

11

Start / End Page

112301

Location

United States

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences