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Long-Range Transverse-Momentum Correlations and Radial Flow in Pb-Pb Collisions at the LHC.

Publication ,  Journal Article
Acharya, S; Aglieri Rinella, G; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; Ahuja, I; Akbar, Z; Akindinov, A; Ali, B ...
Published in: Physical review letters
January 2026

This Letter presents measurements of long-range transverse-momentum correlations using a new observable, v_{0}(p_{T}), serving as a probe of event-by-event radial-flow fluctuations, the underlying radial expansion, and the medium's properties in heavy-ion collisions. Results are reported for inclusive charged particles, pions, kaons, and protons across various centrality intervals in Pb-Pb collisions at sqrt[s_{NN}]=5.02  TeV, recorded by the ALICE detector. A pseudorapidity-gap technique, similar to that used in anisotropic-flow studies, is employed to suppress short-range correlations. At low p_{T}, a characteristic mass ordering consistent with hydrodynamic collective flow is observed. At higher p_{T} (>3  GeV/c), protons exhibit larger v_{0}(p_{T}) than pions and kaons, in agreement with expectations from quark-recombination models. Comparisons to viscous hydrodynamic calculations with varying bulk viscosity and equation of state demonstrate the sensitivity of the v_{0}(p_{T}) observable to these key medium properties. The findings establish v_{0}(p_{T}) as a valuable addition to the set of observables used in Bayesian analyses for extracting the transport properties and constraining the equation of state of strongly interacting matter, while also helping to systematically explore its sensitivity and impact within such global studies.

Duke Scholars

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

January 2026

Volume

136

Issue

3

Start / End Page

032302

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
 

Citation

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ICMJE
MLA
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Acharya, S., Aglieri Rinella, G., Aglietta, L., Agnello, M., Agrawal, N., Ahammed, Z., … Kumar, D. (2026). Long-Range Transverse-Momentum Correlations and Radial Flow in Pb-Pb Collisions at the LHC. Physical Review Letters, 136(3), 032302. https://doi.org/10.1103/l36g-6f46
Acharya, S., G. Aglieri Rinella, L. Aglietta, M. Agnello, N. Agrawal, Z. Ahammed, S. Ahmad, et al. “Long-Range Transverse-Momentum Correlations and Radial Flow in Pb-Pb Collisions at the LHC.Physical Review Letters 136, no. 3 (January 2026): 032302. https://doi.org/10.1103/l36g-6f46.
Acharya S, Aglieri Rinella G, Aglietta L, Agnello M, Agrawal N, Ahammed Z, et al. Long-Range Transverse-Momentum Correlations and Radial Flow in Pb-Pb Collisions at the LHC. Physical review letters. 2026 Jan;136(3):032302.
Acharya, S., et al. “Long-Range Transverse-Momentum Correlations and Radial Flow in Pb-Pb Collisions at the LHC.Physical Review Letters, vol. 136, no. 3, Jan. 2026, p. 032302. Epmc, doi:10.1103/l36g-6f46.
Acharya S, Aglieri Rinella G, Aglietta L, Agnello M, Agrawal N, Ahammed Z, Ahmad S, Ahn SU, Ahuja I, Akbar Z, Akindinov A, Akishina V, Al-Turany M, Aleksandrov D, Alessandro B, Alfanda HM, Alfaro Molina R, Ali B, Alici A, Alizadehvandchali N, Alkin A, Alme J, Alocco G, Alt T, Altamura AR, Altsybeev I, Anaam MN, Andrei C, Andreou N, Andronic A, Andronov E, Anguelov V, Antinori F, Antonioli P, Apadula N, Appelshäuser H, Arata C, Arcelli S, Arnaldi R, Arneiro JGMCA, Arsene IC, Arslandok M, Augustinus A, Averbeck R, Averyanov D, Azmi MD, Baba H, Badalà A, Bae J, Bae Y, Baek YW, Bai X, Bailhache R, Bailung Y, Bala R, Baldisseri A, Balis B, Bangalia S, Banoo Z, Barbasova V, Barile F, Barioglio L, Barlou M, Barman B, Barnaföldi GG, Barnby LS, Barreau E, Barret V, Barreto L, Barth K, Bartsch E, Bastid N, Basu S, Batigne G, Battistini D, Batyunya B, Bauri D, Bazo Alba JL, Bearden IG, Becht P, Behera D, Belikov I, Bell Hechavarria ADC, Bellini F, Bellwied R, Belokurova S, Beltran LGE, Beltran YAV, Bencedi G, Bensaoula A, Beole S, Berdnikov Y, Berdnikova A, Bergmann L, Bernardinis L, Betev L, Bhaduri PP, Bhalla T, Bhasin A, Bhattacharjee B, Bhattarai S, Bianchi L, Bielčík J, Bielčíková J, Bigot AP, Bilandzic A, Binoy A, Biro G, Biswas S, Bize N, Blau D, Blidaru MB, Bluhme N, Blume C, Bock F, Bodova T, Bok J, Boldizsár L, Bombara M, Bond PM, Bonomi G, Borel H, Borissov A, Borquez Carcamo AG, Botta E, Bouziani YEM, Brandibur DC, Bratrud L, Braun-Munzinger P, Bregant M, Broz M, Bruno GE, Buchakchiev VD, Buckland MD, Budnikov D, Buesching H, Bufalino S, Buhler P, Burmasov N, Buthelezi Z, Bylinkin A, Bysiak SA, Cabanillas Noris JC, Cabrera MFT, Caines H, Caliva A, Calvo Villar E, Camacho JMM, Camerini P, Camerlingo MT, Canedo FDM, Cannito S, Cantway SL, Carabas M, Carnesecchi F, Carvalho LAD, Castillo Castellanos J, Castoldi M, Catalano F, Cattaruzzi S, Cerri R, Chakaberia I, Chakraborty P, Chandra S, Chapeland S, Chartier M, Chattopadhay S, Chen M, Cheng T, Cheshkov C, Chiappara D, Chibante Barroso V, Chinellato DD, Chinu F, Chizzali ES, Cho J, Cho S, Chochula P, Chochulska ZA, Choudhury D, Choudhury S, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Ciacco M, Cicalo C, Cimador G, Cindolo F, Ciupek MR, Clai G, Colamaria F, Colburn JS, Colella D, Colelli A, Colocci M, Concas M, Conesa Balbastre G, Conesa Del Valle Z, Contin G, Contreras JG, Coquet ML, Cortese P, Cosentino MR, Costa F, Costanza S, Crochet P, Czarnynoga MM, Dainese A, Dange G, Danisch MC, Danu A, Das P, Das S, Dash AR, Dash S, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gruttola D, De Marco N, De Martin C, De Pasquale S, Deb R, Del Grande R, Dello Stritto L, de Souza GGA, Dhankher P, Di Bari D, Di Costanzo M, Di Mauro A, Di Ruzza B, Diab B, Diaz RA, Ding Y, Ditzel J, Divià R, Djuvsland Ø, Dmitrieva U, Dobrin A, Dönigus B, Dubinski JM, Dubla A, Dupieux P, Dzalaiova N, Eder TM, Ehlers RJ, Eisenhut F, Ejima R, Elia D, Erazmus B, Ercolessi F, Espagnon B, Eulisse G, Evans D, Evdokimov S, Fabbietti L, Faggin M, Faivre J, Fan F, Fan W, Fang T, Fantoni A, Fasel M, Feofilov G, Fernández Téllez A, Ferrandi L, Ferrer MB, Ferrero A, Ferrero C, Ferretti A, Feuillard VJG, Filova V, Finogeev D, Fionda FM, Flor F, Flores AN, Foertsch S, Fokin I, Fokin S, Follo U, Forynski R, Fragiacomo E, Frajna E, Fribert H, Fuchs U, Funicello N, Furget C, Furs A, Fusayasu T, Gaardhøje JJ, Gagliardi M, Gago AM, Gahlaut T, Galvan CD, Gami S, Gangadharan DR, Ganoti P, Garabatos C, Garcia JM, García Chávez T, Garcia-Solis E, Garetti S, Gargiulo C, Gasik P, Gaur HM, Gautam A, Gay Ducati MB, Germain M, Gernhaeuser RA, Ghosh C, Giacalone M, Gioachin G, Giri SK, Giubellino P, Giubilato P, Glaenzer AMC, Glässel P, Glimos E, Gonzalez V, Gordeev P, Gorgon M, Goswami K, Gotovac S, Grabski V, Graczykowski LK, Grecka E, Grelli A, Grigoras C, Grigoriev V, Grigoryan S, Groettvik OS, Grosa F, Grosse-Oetringhaus JF, Grosso R, Grund D, Grunwald NA, Guernane R, Guilbaud M, Gulbrandsen K, Gumprecht JK, Gündem T, Gunji T, Guo J, Guo W, Gupta A, Gupta R, Gwizdziel K, Gyulai L, Hadjidakis C, Haider FU, Haidlova S, Haldar M, Hamagaki H, Han Y, Hanley BG, Hannigan R, Hansen J, Harris JW, Harton A, Hartung MV, Hassan H, Hatzifotiadou D, Hauer P, Havener LB, Hellbär E, Helstrup H, Hemmer M, Herman T, Hernandez SG, Herrera Corral G, Herrmann S, Hetland KF, Heybeck B, Hillemanns H, Hippolyte B, Hobus IPM, Hoffmann FW, Hofman B, Horst M, Horzyk A, Hou Y, Hristov P, Huhn P, Huhta LM, Humanic TJ, Hutson A, Hutter D, Hwang MC, Ilkaev R, Inaba M, Ippolitov M, Isakov A, Isidori T, Islam MS, Iurchenko S, Ivanov M, Ivanov V, Iversen KE, Jablonski M, Jacak B, Jacazio N, Jacobs PM, Jadlovska S, Jadlovsky J, Jaelani S, Jahnke C, Jakubowska MJ, Janik MA, Ji S, Jia S, Jiang T, Jimenez AAP, Jin S, Jonas F, Jones DM, Jowett JM, Jung J, Jung M, Junique A, Jusko A, Kaewjai J, Kalinak P, Kalweit A, Karasu Uysal A, Karatzenis N, Karavichev O, Karavicheva T, Karpechev E, Karwowska MJ, Kebschull U, Keil M, Ketzer B, Keul J, Khade SS, Khan AM, Khan S, Khanzadeev A, Kharlov Y, Khatun A, Khuntia A, Khuranova Z, Kileng B, Kim B, Kim C, Kim DJ, Kim D, Kim EJ, Kim G, Kim H, Kim J, Kim M, Kim S, Kim T, Kimura K, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein S, Klein-Bösing C, Kleiner M, Klemenz T, Kluge A, Kobdaj C, Kohara R, Kollegger T, Kondratyev A, Kondratyeva N, Konig J, Konigstorfer SA, Konopka PJ, Kornakov G, Korwieser M, Koryciak SD, Koster C, Kotliarov A, Kovacic N, Kovalenko V, Kowalski M, Kozhuharov V, Kozlov G, Králik I, Kravčáková A, Krcal L, Krivda M, Krizek F, Krizkova Gajdosova K, Krug C, Krüger M, Krupova DM, Kryshen E, Kučera V, Kuhn C, Kuijer PG, Kumaoka T, Kumar D. Long-Range Transverse-Momentum Correlations and Radial Flow in Pb-Pb Collisions at the LHC. Physical review letters. 2026 Jan;136(3):032302.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

January 2026

Volume

136

Issue

3

Start / End Page

032302

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering