质子-铅离子碰撞中前向和后向区域中性π介子的核修正因子

Nuclear Modification Factor of Neutral Pions in the Forward and Backward Regions in p-Pb Collisions.

作者信息

Aaij R, Abdelmotteleb A S W, Abellan Beteta C, Abudinén F, Ackernley T, Adeva B, Adinolfi M, Afsharnia H, Agapopoulou C, Aidala C A, Aiola S, Ajaltouni Z, Akar S, Akiba K, Albrecht J, Alessio F, Alexander M, Alfonso Albero A, Aliouche Z, Alvarez Cartelle P, Amato S, Amey J L, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreotti M, Ao D, Archilli F, Artamonov A, Artuso M, Arzymatov K, Aslanides E, Atzeni M, Audurier B, Bachmann S, Bachmayer M, Back J J, Bailly-Reyre A, Baladron Rodriguez P, Balagura V, Baldini W, Baptista de Souza Leite J, Barbetti M, Barlow R J, Barsuk S, Barter W, Bartolini M, Baryshnikov F, Basels J M, Bassi G, Batsukh B, Battig A, Bay A, Beck A, Becker M, Bedeschi F, Bediaga I B, Beiter A, Belavin V, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Berninghoff D, Bernstein H C, Bertella C, Bertolin A, Betancourt C, Betti F, Bezshyiko Ia, Bhasin S, Bhom J, Bian L, Bieker M S, Biesuz N V, Bifani S, Billoir P, Biolchini A, Birch M, Bishop F C R, Bitadze A, Bizzeti A, Bjørn M, Blago M P, Blake T, Blanc F, Blusk S, Bobulska D, Boelhauve J A, Boente Garcia O, Boettcher T, Boldyrev A, Bondar N, Borghi S, Borisyak M, Borsato M, Borsuk J T, Bouchiba S A, Bowcock T J V, Boyer A, Bozzi C, Bradley M J, Braun S, Brea Rodriguez A, Brodzicka J, Brossa Gonzalo A, Brundu D, Buonaura A, Buonincontri L, Burke A T, Burr C, Bursche A, Butkevich A, Butter J S, Buytaert J, Byczynski W, Cadeddu S, Cai H, Calabrese R, Calefice L, Cali S, Calladine R, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Campana P, Campora Perez D H, Campoverde Quezada A F, Capelli S, Capriotti L, Carbone A, Carboni G, Cardinale R, Cardini A, Carli I, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Cattaneo M, Cavallero G, Cavallini V, Celani S, Cerasoli J, Cervenkov D, Chadwick A J, Chapman M G, Charles M, Charpentier Ph, Chavez Barajas C A, Chefdeville M, Chen C, Chen S, Chernov A, Chobanova V, Cholak S, Chrzaszcz M, Chubykin A, Chulikov V, Ciambrone P, Cicala M F, Cid Vidal X, Ciezarek G, Ciullo G, Clarke P E L, Clemencic M, Cliff H V, Closier J, Cobbledick J L, Coco V, Coelho J A B, Cogan J, Cogneras E, Cojocariu L, Collins P, Colombo T, Congedo L, Contu A, Cooke N, Coombs G, Corredoira I, Corti G, Costa Sobral C M, Couturier B, Craik D C, Crkovská J, Cruz Torres M, Currie R, Da Silva C L, Dadabaev S, Dai L, Dall'Occo E, Dalseno J, D'Ambrosio C, Danilina A, d'Argent P, Davies J E, Davis A, De Aguiar Francisco O, de Boer J, De Bruyn K, De Capua S, De Cian M, De Freitas Carneiro Da Graca U, De Lucia E, De Miranda J M, De Paula L, De Serio M, De Simone D, De Simone P, De Vellis F, de Vries J A, Dean C T, Debernardis F, Decamp D, Dedu V, Del Buono L, Delaney B, Dembinski H-P, Denysenko V, Deschamps O, Dettori F, Dey B, Di Cicco A, Di Nezza P, Didenko S, Dieste Maronas L, Ding S, Dobishuk V, Dong C, Donohoe A M, Dordei F, Dos Reis A C, Douglas L, Downes A G, Dudek M W, Dufour L, Duk V, Durante P, Durham J M, Dutta D, Dziurda A, Dzyuba A, Easo S, Egede U, Egorychev V, Eidelman S, Eisenhardt S, Ek-In S, Eklund L, Ely S, Ene A, Epple E, Escher S, Eschle J, Esen S, Evans T, Falcao L N, Fan Y, Fang B, Farry S, Fazzini D, Feo M, Fernandez Prieto A, Fernez A D, Ferrari F, Ferreira Lopes L, Ferreira Rodrigues F, Ferreres Sole S, Ferrillo M, Ferro-Luzzi M, Filippov S, Fini R A, Fiorini M, Firlej M, Fischer K M, Fitzgerald D S, Fitzpatrick C, Fiutowski T, Fleuret F, Fontana M, Fontanelli F, Forty R, Foulds-Holt D, Franco Lima V, Franco Sevilla M, Frank M, Franzoso E, Frau G, Frei C, Friday D A, Fu J, Fuehring Q, Gabriel E, Galati G, Gallas Torreira A, Galli D, Gambetta S, Gan Y, Gandelman M, Gandini P, Gao Y, Garau M, Garcia Martin L M, Garcia Moreno P, García Pardiñas J, Garcia Plana B, Garcia Rosales F A, Garrido L, Gaspar C, Geertsema R E, Gerick D, Gerken L L, Gersabeck E, Gersabeck M, Gershon T, Giambastiani L, Gibson V, Giemza H K, Gilman A L, Giovannetti M, Gioventù A, Gironella Gironell P, Giugliano C, Gizdov K, Gkougkousis E L, Gligorov V V, Göbel C, Golobardes E, Golubkov D, Golutvin A, Gomes A, Gomez Fernandez S, Goncalves Abrantes F, Goncerz M, Gong G, Gorelov I V, Gotti C, Grabowski J P, Grammatico T, Granado Cardoso L A, Graugés E, Graverini E, Graziani G, Grecu A T, Greeven L M, Grieser N A, Grillo L, Gromov S, Gruberg Cazon B R, Gu C, Guarise M, Guittiere M, Günther P A, Gushchin E, Guth A, Guz Y, Gys T, Hadavizadeh T, Haefeli G, Haen C, Haimberger J, Haines S C, Halewood-Leagas T, Halvorsen M M, Hamilton P M, Hammerich J, Han Q, Han X, Hansen E B, Hansmann-Menzemer S, Hao L, Harnew N, Harrison T, Hasse C, Hatch M, He J, Heijhoff K, Heinicke K, Henderson R D L, Hennequin A M, Hennessy K, Henry L, Heuel J, Hicheur A, Hill D, Hilton M, Hollitt S E, Hou R, Hou Y, Hu J, Hu J, Hu W, Hu X, Huang W, Huang X, Hulsbergen W, Hunter R J, Hushchyn M, Hutchcroft D, Hynds D, Ibis P, Idzik M, Ilin D, Ilten P, Inglessi A, Iniukhin A, Ishteev A, Ivshin K, Jacobsson R, Jage H, Jakobsen S, Jans E, Jashal B K, Jawahery A, Jevtic V, Jiang X, John M, Johnson D, Jones C R, Jones T P, Jost B, Jurik N, Kandybei S, Kang Y, Karacson M, Karpenkov D, Karpov M, Kautz J W, Keizer F, Keller D M, Kenzie M, Ketel T, Khanji B, Kharisova A, Kholodenko S, Kirn T, Kirsebom V S, Kitouni O, Klaver S, Kleijne N, Klimaszewski K, Kmiec M R, Koliiev S, Kondybayeva A, Konoplyannikov A, Kopciewicz P, Kopecna R, Koppenburg P, Korolev M, Kostiuk I, Kot O, Kotriakhova S, Kozachuk A, Kravchenko P, Kravchuk L, Krawczyk R D, Kreps M, Kretzschmar S, Krokovny P, Krupa W, Krzemien W, Kubat J, Kucewicz W, Kucharczyk M, Kudryavtsev V, Kuindersma H S, Kunde G J, Kvaratskheliya T, Lacarrere D, Lafferty G, Lai A, Lampis A, Lancierini D, Lane J J, Lane R, Lanfranchi G, Langenbruch C, Langer J, Lantwin O, Latham T, Lazzari F, Lazzaroni M, Le Gac R, Lee S H, Lefèvre R, Leflat A, Legotin S, Lenisa P, Leroy O, Lesiak T, Leverington B, Li H, Li P, Li S, Li Y, Li Z, Liang X, Lin T, Lindner R, Lisovskyi V, Litvinov R, Liu G, Liu H, Liu Q, Liu S, Lobo Salvia A, Loi A, Lollini R, Lomba Castro J, Longstaff I, Lopes J H, López Soliño S, Lovell G H, Lu Y, Lucarelli C, Lucchesi D, Luchuk S, Lucio Martinez M, Lukashenko V, Luo Y, Lupato A, Luppi E, Lupton O, Lusiani A, Lyu X-R, Ma L, Ma R, Maccolini S, Machefert F, Maciuc F, Macko V, Mackowiak P, Maddrell-Mander S, Madhan Mohan L R, Maevskiy A, Maisuzenko D, Majewski M W, Malczewski J J, Malde S, Malecki B, Malinin A, Maltsev T, Malygina H, Manca G, Mancinelli G, Manuzzi D, Manzari C A, Marangotto D, Marchand J F, Marconi U, Mariani S, Marin Benito C, Marinangeli M, Marks J, Marshall A M, Marshall P J, Martelli G, Martellotti G, Martinazzoli L, Martinelli M, Martinez Santos D, Martinez Vidal F, Massafferri A, Materok M, Matev R, Mathad A, Matiunin V, Matteuzzi C, Mattioli K R, Mauri A, Maurice E, Mauricio J, Mazurek M, McCann M, Mcconnell L, McGrath T H, McHugh N T, McNab A, McNulty R, Mead J V, Meadows B, Meier G, Melnychuk D, Meloni S, Merk M, Merli A, Meyer Garcia L, Mikhasenko M, Milanes D A, Millard E, Milovanovic M, Minard M-N, Minotti A, Mitchell S E, Mitreska B, Mitzel D S, Mödden A, Mohammed R A, Moise R D, Mokhnenko S, Mombächer T, Monroy I A, Monteil S, Morandin M, Morello G, Morello M J, Moron J, Morris A B, Morris A G, Mountain R, Mu H, Muheim F, Mulder M, Müller K, Murphy C H, Murray D, Murta R, Muzzetto P, Naik P, Nakada T, Nandakumar R, Nanut T, Nasteva I, Needham M, Neri N, Neubert S, Neufeld N, Neustroev P, Newcombe R, Niel E M, Nieswand S, Nikitin N, Nolte N S, Normand C, Nunez C, Oblakowska-Mucha A, Obraztsov V, Oeser T, O'Hanlon D P, Okamura S, Oldeman R, Oliva F, Olivares M E, Onderwater C J G, O'Neil R H, Otalora Goicochea J M, Ovsiannikova T, Owen P, Oyanguren A, Ozcelik O, Padeken K O, Pagare B, Pais P R, Pajero T, Palano A, Palutan M, Pan Y, Panshin G, Papanestis A, Pappagallo M, Pappalardo L L, Pappenheimer C, Parker W, Parkes C, Passalacqua B, Passaleva G, Pastore A, Patel M, Patrignani C, Pawley 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机构信息

Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.

Department of Physics, University of Warwick, Coventry, United Kingdom.

出版信息

Phys Rev Lett. 2023 Jul 28;131(4):042302. doi: 10.1103/PhysRevLett.131.042302.

DOI:10.1103/PhysRevLett.131.042302

PMID:37566846

Abstract

The nuclear modification factor of neutral pions is measured in proton-lead collisions collected at a center-of-mass energy per nucleon of 8.16 TeV with the LHCb detector. The π^{0} production cross section is measured differentially in transverse momentum (p_{T}) for 1.5<p_{T}<10.0 GeV and in center-of-mass pseudorapidity (η_{c.m.}) regions 2.5<η_{c.m.}<3.5 (forward) and -4.0<η_{c.m.}<-3.0 (backward) defined relative to the proton beam direction. The forward measurement shows a sizable suppression of π^{0} production, while the backward measurement shows the first evidence of π^{0} enhancement in proton-lead collisions at the LHC. Together, these measurements provide precise constraints on models of nuclear structure and particle production in high-energy nuclear collisions.

摘要

利用大型强子对撞机底夸克探测器（LHCb），在每核子质心能量为8.16 TeV的质子-铅碰撞中测量了中性π介子的核修正因子。在1.5 < pT < 10.0 GeV的横向动量（pT）以及相对于质子束方向定义的质心赝快度（ηc.m.）区域2.5 < ηc.m. < 3.5（向前）和-4.0 < ηc.m. < -3.0（向后）中，对π0产生截面进行了微分测量。向前测量显示出π0产生有显著抑制，而向后测量则首次证明了在大型强子对撞机的质子-铅碰撞中π0增强。这些测量共同为高能核碰撞中的核结构和粒子产生模型提供了精确限制。