Enhanced production of multi-strange hadrons in high-multiplicity proton–proton collisions

Author:

,Adam J.,Adamová D.,Aggarwal M. M.,Rinella G. Aglieri,Agnello M.,Agrawal N.,Ahammed Z.,Ahmad S.,Ahn S. U.,Aiola S.,Akindinov A.,Alam S. N.,Albuquerque D. S. D.,Aleksandrov D.,Alessandro B.,Alexandre D.,Molina R. Alfaro,Alici A.,Alkin A.,Alme J.,Alt T.,Altinpinar S.,Altsybeev I.,Prado C. Alves Garcia,An M.,Andrei C.,Andrews H. A.,Andronic A.,Anguelov V.,Antičić T.,Antinori F.,Antonioli P.,Aphecetche L.,Appelshäuser H.,Arcelli S.,Arnaldi R.,Arnold O. W.,Arsene I. C.,Arslandok M.,Audurier B.,Augustinus A.,Averbeck R.,Azmi M. D.,Badalà A.,Baek Y. W.,Bagnasco S.,Bailhache R.,Bala R.,Balasubramanian S.,Baldisseri A.,Baral R. C.,Barbano A. M.,Barbera R.,Barile F.,Barnaföldi G. G.,Barnby L. S.,Barret V.,Bartalini P.,Barth K.,Bartke J.,Bartsch E.,Basile M.,Bastid N.,Basu S.,Bathen B.,Batigne G.,Camejo A. Batista,Batyunya B.,Batzing P. C.,Bearden I. G.,Beck H.,Bedda C.,Behera N. K.,Belikov I.,Bellini F.,Martinez H. Bello,Bellwied R.,Belmont R.,Belmont-Moreno E.,Beltran L. G. E.,Belyaev V.,Bencedi G.,Beole S.,Berceanu I.,Bercuci A.,Berdnikov Y.,Berenyi D.,Bertens R. A.,Berzano D.,Betev L.,Bhasin A.,Bhat I. R.,Bhati A. K.,Bhattacharjee B.,Bhom J.,Bianchi L.,Bianchi N.,Bianchin C.,Bielčík J.,Bielčíková J.,Bilandzic A.,Biro G.,Biswas R.,Biswas S.,Bjelogrlic S.,Blair J. T.,Blau D.,Blume C.,Bock F.,Bogdanov A.,Bøggild H.,Boldizsár L.,Bombara M.,Bonora M.,Book J.,Borel H.,Borissov A.,Borri M.,Bossú F.,Botta E.,Bourjau C.,Braun-Munzinger P.,Bregant M.,Breitner T.,Broker T. A.,Browning T. A.,Broz M.,Brucken E. J.,Bruna E.,Bruno G. E.,Budnikov D.,Buesching H.,Bufalino S.,Buncic P.,Busch O.,Buthelezi Z.,Butt J. B.,Buxton J. T.,Cabala J.,Caffarri D.,Cai X.,Caines H.,Diaz L. Calero,Caliva A.,Villar E. Calvo,Camerini P.,Carena F.,Carena W.,Carnesecchi F.,Castellanos J. Castillo,Castro A. J.,Casula E. A. R.,Sanchez C. Ceballos,Cepila J.,Cerello P.,Cerkala J.,Chang B.,Chapeland S.,Chartier M.,Charvet J. L.,Chattopadhyay S.,Chattopadhyay S.,Chauvin A.,Chelnokov V.,Cherney M.,Cheshkov C.,Cheynis B.,Barroso V. Chibante,Chinellato D. D.,Cho S.,Chochula P.,Choi K.,Chojnacki M.,Choudhury S.,Christakoglou P.,Christensen C. H.,Christiansen P.,Chujo T.,Chung S. U.,Cicalo C.,Cifarelli L.,Cindolo F.,Cleymans J.,Colamaria F.,Colella D.,Collu A.,Colocci M.,Balbastre G. Conesa,del Valle Z. Conesa,Connors M. E.,Contreras J. G.,Cormier T. M.,Morales Y. Corrales,Maldonado I. Cortés,Cortese P.,Cosentino M. R.,Costa F.,Crkovska J.,Crochet P.,Albino R. Cruz,Cuautle E.,Cunqueiro L.,Dahms T.,Dainese A.,Danisch M. C.,Danu A.,Das D.,Das I.,Das S.,Dash A.,Dash S.,De S.,De Caro A.,de Cataldo G.,de Conti C.,de Cuveland J.,De Falco A.,De Gruttola D.,De Marco N.,De Pasquale S.,De Souza R. D.,Deisting A.,Deloff A.,Dénes E.,Deplano C.,Dhankher P.,Di Bari D.,Di Mauro A.,Di Nezza P.,Di Ruzza B.,Corchero M. A. Diaz,Dietel T.,Dillenseger P.,Divià R.,Djuvsland Ø.,Dobrin A.,Gimenez D. Domenicis,Dönigus B.,Dordic O.,Drozhzhova T.,Dubey A. K.,Dubla A.,Ducroux L.,Dupieux P.,Ehlers R. J.,Elia D.,Endress E.,Engel H.,Epple E.,Erazmus B.,Erdemir I.,Erhardt F.,Espagnon B.,Estienne M.,Esumi S.,Eum J.,Evans D.,Evdokimov S.,Eyyubova G.,Fabbietti L.,Fabris D.,Faivre J.,Fantoni A.,Fasel M.,Feldkamp L.,Feliciello A.,Feofilov G.,Ferencei J.,Téllez A. Fernández,Ferreiro E. G.,Ferretti A.,Festanti A.,Feuillard V. J. G.,Figiel J.,Figueredo M. A. S.,Filchagin S.,Finogeev D.,Fionda F. M.,Fiore E. M.,Floris M.,Foertsch S.,Foka P.,Fokin S.,Fragiacomo E.,Francescon A.,Francisco A.,Frankenfeld U.,Fronze G. G.,Fuchs U.,Furget C.,Furs A.,Girard M. Fusco,Gaardhøje J. J.,Gagliardi M.,Gago A. M.,Gajdosova K.,Gallio M.,Galvan C. D.,Gangadharan D. R.,Ganoti P.,Gao C.,Garabatos C.,Garcia-Solis E.,Garg K.,Gargiulo C.,Gasik P.,Gauger E. F.,Germain M.,Gheata M.,Ghosh P.,Ghosh S. K.,Gianotti P.,Giubellino P.,Giubilato P.,Gladysz-Dziadus E.,Glässel P.,Coral D. M. Goméz,Ramirez A. Gomez,Gonzalez A. S.,Gonzalez V.,González-Zamora P.,Gorbunov S.,Görlich L.,Gotovac S.,Grabski V.,Grachov O. A.,Graczykowski L. K.,Graham K. L.,Grelli A.,Grigoras A.,Grigoras C.,Grigoriev V.,Grigoryan A.,Grigoryan S.,Grinyov B.,Grion N.,Gronefeld J. M.,Grosse-Oetringhaus J. F.,Grosso R.,Gruber L.,Guber F.,Guernane R.,Guerzoni B.,Gulbrandsen K.,Gunji T.,Gupta A.,Gupta R.,Haake R.,Hadjidakis C.,Haiduc M.,Hamagaki H.,Hamar G.,Hamon J. C.,Harris J. W.,Harton A.,Hatzifotiadou D.,Hayashi S.,Heckel S. T.,Hellbär E.,Helstrup H.,Herghelegiu A.,Corral G. Herrera,Herrmann F.,Hess B. A.,Hetland K. F.,Hillemanns H.,Hippolyte B.,Horak D.,Hosokawa R.,Hristov P.,Hughes C.,Humanic T. J.,Hussain N.,Hussain T.,Hutter D.,Hwang D. S.,Ilkaev R.,Inaba M.,Incani E.,Ippolitov M.,Irfan M.,Isakov V.,Ivanov M.,Ivanov V.,Izucheev V.,Jacak B.,Jacazio N.,Jacobs P. M.,Jadhav M. B.,Jadlovska S.,Jadlovsky J.,Jahnke C.,Jakubowska M. J.,Janik M. A.,Jayarathna P. H. S. Y.,Jena C.,Jena S.,Bustamante R. T. Jimenez,Jones P. G.,Jusko A.,Kalinak P.,Kalweit A.,Kang J. H.,Kaplin V.,Kar S.,Uysal A. Karasu,Karavichev O.,Karavicheva T.,Karayan L.,Karpechev E.,Kebschull U.,Keidel R.,Keijdener D. L. D.,Keil M.,Khan M. Mohisin,Khan P.,Khan S. A.,Khanzadeev A.,Kharlov Y.,Khatun A.,Kileng B.,Kim D. W.,Kim D. J.,Kim D.,Kim H.,Kim J. S.,Kim J.,Kim M.,Kim S.,Kim T.,Kirsch S.,Kisel I.,Kiselev S.,Kisiel A.,Kiss G.,Klay J. L.,Klein C.,Klein J.,Klein-Bösing C.,Klewin S.,Kluge A.,Knichel M. L.,Knospe A. G.,Kobdaj C.,Kofarago M.,Kollegger T.,Kolojvari A.,Kondratiev V.,Kondratyeva N.,Kondratyuk E.,Konevskikh A.,Kopcik M.,Kour M.,Kouzinopoulos C.,Kovalenko O.,Kovalenko V.,Kowalski M.,Meethaleveedu G. Koyithatta,Králik I.,Kravčáková A.,Krivda M.,Krizek F.,Kryshen E.,Krzewicki M.,Kubera A. M.,Kučera V.,Kuhn C.,Kuijer P. G.,Kumar A.,Kumar J.,Kumar L.,Kumar S.,Kurashvili P.,Kurepin A.,Kurepin A. B.,Kuryakin A.,Kweon M. J.,Kwon Y.,La Pointe S. L.,La Rocca P.,de Guevara P. Ladron,Fernandes C. Lagana,Lakomov I.,Langoy R.,Lapidus K.,Lara C.,Lardeux A.,Lattuca A.,Laudi E.,Lea R.,Leardini L.,Lee S.,Lehas F.,Lehner S.,Lemmon R. C.,Lenti V.,Leogrande E.,Monzón I. León,Vargas H. León,Leoncino M.,Lévai P.,Li S.,Li X.,Lien J.,Lietava R.,Lindal S.,Lindenstruth V.,Lippmann C.,Lisa M. A.,Ljunggren H. M.,Lodato D. F.,Loenne P. I.,Loginov V.,Loizides C.,Lopez X.,Torres E. López,Lowe A.,Luettig P.,Lunardon M.,Luparello G.,Lupi M.,Lutz T. H.,Maevskaya A.,Mager M.,Mahajan S.,Mahmood S. M.,Maire A.,Majka R. D.,Malaev M.,Cervantes I. Maldonado,Malinina L.,Mal’Kevich D.,Malzacher P.,Mamonov A.,Manko V.,Manso F.,Manzari V.,Mao Y.,Marchisone M.,Mareš J.,Margagliotti G. V.,Margotti A.,Margutti J.,Marín A.,Markert C.,Marquard M.,Martin N. A.,Martinengo P.,Martínez M. I.,García G. Martínez,Pedreira M. Martinez,Mas A.,Masciocchi S.,Masera M.,Masoni A.,Mastroserio A.,Matyja A.,Mayer C.,Mazer J.,Mazzilli M.,Mazzoni M. A.,Mcdonald D.,Meddi F.,Melikyan Y.,Menchaca-Rocha A.,Meninno E.,Pérez J. Mercado,Meres M.,Mhlanga S.,Miake Y.,Mieskolainen M. M.,Mikhaylov K.,Milano L.,Milosevic J.,Mischke A.,Mishra A. N.,Mishra T.,Miśkowiec D.,Mitra J.,Mitu C. M.,Mohammadi N.,Mohanty B.,Molnar L.,Zetina L. Montaño,Montes E.,De Godoy D. A. Moreira,Moreno L. A. P.,Moretto S.,Morreale A.,Morsch A.,Muccifora V.,Mudnic E.,Mühlheim D.,Muhuri S.,Mukherjee M.,Mulligan J. D.,Munhoz M. G.,Münning K.,Munzer R. H.,Murakami H.,Murray S.,Musa L.,Musinsky J.,Naik B.,Nair R.,Nandi B. K.,Nania R.,Nappi E.,Naru M. U.,da Luz H. Natal,Nattrass C.,Navarro S. R.,Nayak K.,Nayak R.,Nayak T. K.,Nazarenko S.,Nedosekin A.,De Oliveira R. A. Negrao,Nellen L.,Ng F.,Nicassio M.,Niculescu M.,Niedziela J.,Nielsen B. S.,Nikolaev S.,Nikulin S.,Nikulin V.,Noferini F.,Nomokonov P.,Nooren G.,Noris J. C. C.,Norman J.,Nyanin A.,Nystrand J.,Oeschler H.,Oh S.,Oh S. K.,Ohlson A.,Okatan A.,Okubo T.,Oleniacz J.,Da Silva A. C. Oliveira,Oliver M. H.,Onderwaater J.,Oppedisano C.,Orava R.,Oravec M.,Velasquez A. Ortiz,Oskarsson A.,Otwinowski J.,Oyama K.,Ozdemir M.,Pachmayer Y.,Pagano D.,Pagano P.,Paić G.,Pal S. K.,Palni P.,Pan J.,Pandey A. K.,Papikyan V.,Pappalardo G. S.,Pareek P.,Park W. J.,Parmar S.,Passfeld A.,Paticchio V.,Patra R. N.,Paul B.,Pei H.,Peitzmann T.,Peng X.,Da Costa H. Pereira,Peresunko D.,Lezama E. Perez,Peskov V.,Pestov Y.,Petráček V.,Petrov V.,Petrovici M.,Petta C.,Piano S.,Pikna M.,Pillot P.,Pimentel L. O. D. L.,Pinazza O.,Pinsky L.,Piyarathna D. B.,Płoskoń M.,Planinic M.,Pluta J.,Pochybova S.,Podesta-Lerma P. L. M.,Poghosyan M. G.,Polichtchouk B.,Poljak N.,Poonsawat W.,Pop A.,Poppenborg H.,Porteboeuf-Houssais S.,Porter J.,Pospisil J.,Prasad S. K.,Preghenella R.,Prino F.,Pruneau C. 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J.,Tanaka N.,Tarhini M.,Tariq M.,Tarzila M. G.,Tauro A.,Muñoz G. Tejeda,Telesca A.,Terasaki K.,Terrevoli C.,Teyssier B.,Thäder J.,Thakur D.,Thomas D.,Tieulent R.,Tikhonov A.,Timmins A. R.,Toia A.,Trogolo S.,Trombetta G.,Trubnikov V.,Trzaska W. H.,Tsuji T.,Tumkin A.,Turrisi R.,Tveter T. S.,Ullaland K.,Uras A.,Usai G. L.,Utrobicic A.,Vala M.,Palomo L. Valencia,Van Der Maarel J.,Van Hoorne J. W.,van Leeuwen M.,Vanat T.,Vyvre P. Vande,Varga D.,Vargas A.,Vargyas M.,Varma R.,Vasileiou M.,Vasiliev A.,Vauthier A.,Doce O. Vázquez,Vechernin V.,Veen A. M.,Velure A.,Vercellin E.,Limón S. Vergara,Vernet R.,Vickovic L.,Viinikainen J.,Vilakazi Z.,Baillie O. Villalobos,Tello A. Villatoro,Vinogradov A.,Vinogradov L.,Virgili T.,Vislavicius V.,Viyogi Y. P.,Vodopyanov A.,Völkl M. A.,Voloshin K.,Voloshin S. A.,Volpe G.,von Haller B.,Vorobyev I.,Vranic D.,Vrláková J.,Vulpescu B.,Wagner B.,Wagner J.,Wang H.,Wang M.,Watanabe D.,Watanabe Y.,Weber M.,Weber S. G.,Weiser D. F.,Wessels J. P.,Westerhoff U.,Whitehead A. M.,Wiechula J.,Wikne J.,Wilk G.,Wilkinson J.,Willems G. A.,Williams M. C. S.,Windelband B.,Winn M.,Yalcin S.,Yang P.,Yano S.,Yin Z.,Yokoyama H.,Yoo I.-K.,Yoon J. H.,Yurchenko V.,Zaborowska A.,Zaccolo V.,Zaman A.,Zampolli C.,Zanoli H. J. C.,Zaporozhets S.,Zardoshti N.,Zarochentsev A.,Závada P.,Zaviyalov N.,Zbroszczyk H.,Zgura I. S.,Zhalov M.,Zhang H.,Zhang X.,Zhang Y.,Zhang C.,Zhang Z.,Zhao C.,Zhigareva N.,Zhou D.,Zhou Y.,Zhou Z.,Zhu H.,Zhu J.,Zichichi A.,Zimmermann A.,Zimmermann M. B.,Zinovjev G.,Zyzak M.

Abstract

AbstractAt sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark–gluon plasma (QGP)1. Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed2,3,4,5,6. Strangeness enhancement, originally proposed as a signature of QGP formation in nuclear collisions7, is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton–proton (pp) collisions8,9, but the enhanced production of multi-strange particles has not been reported so far. Here we present the first observation of strangeness enhancement in high-multiplicity proton–proton collisions. We find that the integrated yields of strange and multi-strange particles, relative to pions, increases significantly with the event charged-particle multiplicity. The measurements are in remarkable agreement with the p–Pb collision results10,11, indicating that the phenomenon is related to the final system created in the collision. In high-multiplicity events strangeness production reaches values similar to those observed in Pb–Pb collisions, where a QGP is formed.

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy

Reference40 articles.

1. Shuryak, E. V. Quantum chromodynamics and the theory of superdense matter. Phys. Rep. 61, 71–158 (1980).

2. Andersen, E. et al. (WA97 Collaboration) Strangeness enhancement at mid-rapidity in Pb–Pb collisions at 158 AGeV/c. Phys. Lett. B 449, 401–406 (1999).

3. Afanasiev, S. V. et al. (NA49 Collaboration) Ξ and "Equation missing" No EquationSource Format="TEX", only image production in central Pb+Pb collisions at 158 GeV/c per nucleon. Phys. Lett. B 538, 275–281 (2002).

4. Antinori, F. et al. (NA57 Collaboration) Energy dependence of hyperon production in nucleus–nucleus collisions at SPS. Phys. Lett. B 595, 68–74 (2004).

5. Abelev, B. I. et al. (STAR Collaboration) Enhanced strange baryon production in Au+Au collisions compared to p+p at "Equation missing" No EquationSource Format="TEX", only image . Phys. Rev. C 77, 044908 (2008).

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