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Observation of the Ω ( 2012 ) baryon at the LHC

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A signal consistent with the Ω ( 2012 ) baryon has been observed with a significance of 15 σ in pp collisions at s = 13     TeV at the LHC. In this paper, the analysis technique is described and measurements of the mass and width of the Ω ( 2012 ) are reported, along with the first measurement of its transverse-momentum spectrum and yield. This paper corroborates the observation by the Belle Collaboration of this excited Ω state and the observation that the Ω ( 2012 ) has a rather narrow width for a strongly decaying resonance. The yield measurement is combined with a statistical thermal model calculation of strange baryon yield ratios to obtain estimates of the Ω ( 2012 ) − → Ξ K ¯ branching ratios. These results will improve our understanding of the internal structure and mass spectrum of excited baryon states and serve as a baseline for searches regarding modifications of these properties in high-temperature media.
American Physical Society (APS)
S. Acharya A. Agarwal G. Aglieri Rinella L. Aglietta M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov V. Akishina M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt A. R. Altamura I. Altsybeev J. R. Alvarado M. N. Anaam C. Andrei N. Andreou A. Andronic E. Andronov V. Anguelov F. Antinori P. Antonioli N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli R. Arnaldi J. G. M. C. A. Arneiro I. C. Arsene M. Arslandok A. Augustinus R. Averbeck D. Averyanov M. D. Azmi H. Baba A. Badalà J. Bae Y. Bae Y. W. Baek X. Bai R. Bailhache Y. Bailung R. Bala A. Baldisseri B. Balis Z. Banoo V. Barbasova F. Barile L. Barioglio M. Barlou B. Barman G. G. Barnaföldi L. S. Barnby E. Barreau V. Barret L. Barreto C. Bartels K. Barth E. Bartsch N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova L. G. E. Beltran Y. A. V. Beltran G. Bencedi A. Bensaoula S. Beole Y. Berdnikov A. Berdnikova L. Bergmann L. Bernardinis M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin B. Bhattacharjee S. Bhattarai L. Bianchi J. Bielčík J. Bielčíková A. P. Bigot A. Bilandzic A. Binoy G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume F. Bock T. Bodova J. Bok L. Boldizsár M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov A. G. Borquez Carcamo E. Botta Y. E. M. Bouziani D. C. Brandibur L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno V. D. Buchakchiev M. D. Buckland D. Budnikov H. Buesching S. Bufalino P. Buhler N. Burmasov Z. Buthelezi A. Bylinkin S. A. Bysiak J. C. Cabanillas Noris M. F. T. Cabrera H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo S. Cannito S. L. Cantway M. Carabas A. A. Carballo F. Carnesecchi L. A. D. Carvalho J. Castillo Castellanos M. Castoldi F. 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Goswami S. Gotovac V. Grabski L. K. Graczykowski E. Grecka A. Grelli C. Grigoras V. Grigoriev S. Grigoryan F. Grosa J. F. Grosse-Oetringhaus R. Grosso D. Grund N. A. Grunwald R. Guernane M. Guilbaud K. Gulbrandsen J. K. Gumprecht T. Gündem T. Gunji J. Guo W. Guo A. Gupta R. Gupta R. Gupta K. Gwizdziel L. Gyulai C. Hadjidakis F. U. Haider S. Haidlova M. Haldar H. Hamagaki Y. Han B. G. Hanley R. Hannigan J. Hansen M. R. Haque J. W. Harris A. Harton M. V. Hartung H. Hassan D. Hatzifotiadou P. Hauer L. B. Havener E. Hellbär H. Helstrup M. Hemmer T. Herman S. G. Hernandez G. Herrera Corral S. Herrmann K. F. Hetland B. Heybeck H. Hillemanns B. Hippolyte I. P. M. Hobus F. W. Hoffmann B. Hofman M. Horst A. Horzyk Y. Hou P. Hristov P. Huhn L. M. Huhta T. J. Humanic A. Hutson D. Hutter M. C. Hwang R. Ilkaev M. Inaba G. M. Innocenti M. Ippolitov A. Isakov T. Isidori M. S. Islam S. Iurchenko M. Ivanov M. Ivanov V. Ivanov K. E. Iversen M. Jablonski B. Jacak N. Jacazio P. M. Jacobs S. Jadlovska J. Jadlovsky S. Jaelani C. Jahnke M. J. Jakubowska M. A. Janik T. Janson S. Ji S. Jia T. Jiang A. A. P. Jimenez F. Jonas D. M. Jones J. M. Jowett J. Jung M. Jung A. Junique A. Jusko J. Kaewjai P. Kalinak A. Kalweit A. Karasu Uysal D. Karatovic N. Karatzenis O. Karavichev T. Karavicheva E. Karpechev M. J. Karwowska U. Kebschull M. Keil B. Ketzer J. Keul S. S. Khade A. M. Khan S. Khan A. Khanzadeev Y. Kharlov A. Khatun A. Khuntia Z. Khuranova B. Kileng B. Kim C. Kim D. J. Kim D. Kim E. J. Kim J. Kim J. Kim J. Kim M. Kim S. Kim T. Kim K. Kimura S. Kirsch I. Kisel S. Kiselev A. Kisiel J. L. Klay J. Klein S. Klein C. Klein-Bösing M. Kleiner T. Klemenz A. Kluge A. G. Knospe C. Kobdaj R. Kohara T. Kollegger A. Kondratyev N. Kondratyeva J. Konig S. A. Konigstorfer P. J. Konopka G. Kornakov M. Korwieser S. D. Koryciak C. Koster A. Kotliarov N. Kovacic V. Kovalenko M. Kowalski V. Kozhuharov G. Kozlov I. Králik A. Kravčáková L. Krcal M. Krivda F. Krizek K. Krizkova Gajdosova C. Krug M. Krüger D. M. Krupova E. Kryshen V. Kučera C. Kuhn P. G. Kuijer T. Kumaoka D. Kumar L. Kumar N. Kumar S. Kumar S. Kundu M. Kuo P. Kurashvili A. B. Kurepin A. Kuryakin S. Kushpil V. Kuskov M. Kutyla A. Kuznetsov M. J. Kweon Y. Kwon S. L. La Pointe P. La Rocca A. Lakrathok M. Lamanna S. Lambert A. R. Landou R. Langoy P. Larionov E. Laudi L. Lautner R. A. N. Laveaga R. Lavicka R. Lea H. Lee I. Legrand G. Legras J. Lehrbach A. M. Lejeune T. M. Lelek R. C. Lemmon I. León Monzón M. M. Lesch P. Lévai M. Li P. Li X. Li B. E. Liang-Gilman J. Lien R. Lietava I. Likmeta B. Lim H. Lim S. H. Lim S. Lin V. Lindenstruth C. Lippmann D. Liskova D. H. Liu J. Liu G. S. S. Liveraro I. M. Lofnes C. Loizides S. Lokos J. Lömker X. Lopez E. López Torres C. Lotteau P. Lu Z. Lu F. V. Lugo J. R. Luhder J. Luo G. Luparello Y. G. Ma M. Mager A. Maire E. M. Majerz M. V. Makariev M. Malaev G. Malfattore N. M. Malik S. K. Malik D. Mallick N. Mallick G. Mandaglio S. K. Mandal A. Manea V. Manko A. K. Manna F. Manso G. Mantzaridis V. Manzari Y. Mao R. W. Marcjan G. V. Margagliotti A. Margotti A. Marín C. Markert P. Martinengo M. I. Martínez G. Martínez García M. P. P. Martins S. Masciocchi M. Masera A. Masoni L. Massacrier O. Massen A. Mastroserio L. Mattei S. Mattiazzo A. Matyja F. Mazzaschi M. Mazzilli Y. Melikyan M. Melo A. Menchaca-Rocha J. E. M. Mendez E. Meninno A. S. Menon M. W. Menzel M. Meres L. Micheletti D. Mihai D. L. Mihaylov A. U. Mikalsen K. Mikhaylov N. Minafra D. Miśkowiec A. Modak B. Mohanty M. Mohisin Khan M. A. Molander M. M. Mondal S. Monira C. Mordasini D. A. Moreira De Godoy I. Morozov A. Morsch T. Mrnjavac V. Muccifora S. Muhuri A. Mulliri M. G. Munhoz R. H. Munzer H. Murakami L. Musa J. Musinsky J. W. Myrcha B. Naik A. I. Nambrath B. K. Nandi R. Nania E. Nappi A. F. Nassirpour V. Nastase A. Nath N. F. Nathanson C. Nattrass K. Naumov M. N. Naydenov A. Neagu A. Negru L. Nellen R. Nepeivoda S. Nese N. Nicassio B. S. Nielsen E. G. Nielsen S. Nikolaev V. Nikulin F. Noferini S. Noh P. Nomokonov J. Norman N. Novitzky A. Nyanin J. Nystrand M. R. Ockleton M. Ogino S. Oh A. Ohlson V. A. Okorokov J. Oleniacz A. Onnerstad C. Oppedisano A. Ortiz Velasquez J. Otwinowski M. Oya K. Oyama S. Padhan D. Pagano G. Paić S. Paisano-Guzmán A. Palasciano I. Panasenko S. Panebianco P. Panigrahi C. Pantouvakis H. Park J. Park S. Park J. E. Parkkila Y. Patley R. N. Patra P. Paudel B. Paul H. Pei T. Peitzmann X. Peng M. Pennisi S. Perciballi D. Peresunko G. M. Perez Y. Pestov M. T. Petersen V. Petrov M. Petrovici S. Piano M. Pikna P. Pillot O. Pinazza L. Pinsky C. Pinto S. Pisano M. Płoskoń M. Planinic D. K. Plociennik M. G. Poghosyan B. Polichtchouk S. Politano N. Poljak A. Pop S. Porteboeuf-Houssais V. Pozdniakov I. Y. Pozos K. K. Pradhan S. K. Prasad S. Prasad R. Preghenella F. Prino C. A. Pruneau I. Pshenichnov M. Puccio S. Pucillo S. Qiu L. Quaglia A. M. K. Radhakrishnan S. Ragoni A. Rai A. Rakotozafindrabe L. Ramello C. O. Ramirez-Alvarez M. Rasa S. S. Räsänen R. Rath M. P. Rauch I. Ravasenga K. F. Read C. Reckziegel A. R. Redelbach K. Redlich C. A. Reetz H. D. Regules-Medel A. Rehman F. Reidt H. A. Reme-Ness K. Reygers A. Riabov V. Riabov R. Ricci M. Richter A. A. Riedel W. Riegler A. G. Riffero M. Rignanese C. Ripoli C. Ristea M. V. Rodriguez M. Rodríguez Cahuantzi S. A. Rodríguez Ramírez K. Røed R. Rogalev E. Rogochaya T. S. Rogoschinski D. Rohr D. Röhrich S. Rojas Torres P. S. Rokita G. Romanenko F. Ronchetti D. Rosales Herrera E. D. Rosas K. Roslon A. Rossi A. Roy S. Roy N. Rubini J. A. Rudolph D. Ruggiano R. Rui P. G. Russek R. Russo A. Rustamov E. Ryabinkin Y. Ryabov A. Rybicki L. C. V. Ryder J. Ryu W. Rzesa B. Sabiu S. Sadovsky J. Saetre S. Saha B. Sahoo R. Sahoo D. Sahu P. K. Sahu J. Saini K. Sajdakova S. Sakai M. P. Salvan S. Sambyal D. Samitz I. Sanna T. B. Saramela D. Sarkar P. Sarma V. Sarritzu V. M. Sarti M. H. P. Sas S. Sawan E. Scapparone J. Schambach H. S. Scheid C. Schiaua R. Schicker F. Schlepper A. Schmah C. Schmidt M. O. Schmidt M. Schmidt N. V. Schmidt A. R. Schmier J. Schoengarth R. Schotter A. Schröter J. Schukraft K. Schweda G. Scioli E. Scomparin J. E. Seger Y. Sekiguchi D. Sekihata M. Selina I. Selyuzhenkov S. Senyukov J. J. Seo D. Serebryakov L. Serkin L. Šerkšnytė A. Sevcenco T. J. Shaba A. Shabetai R. Shahoyan A. Shangaraev B. Sharma D. Sharma H. Sharma M. Sharma S. Sharma U. Sharma A. Shatat O. Sheibani K. Shigaki M. Shimomura S. Shirinkin Q. Shou Y. Sibiriak S. Siddhanta T. Siemiarczuk T. F. Silva D. Silvermyr T. Simantathammakul R. Simeonov B. Singh B. Singh K. Singh R. Singh R. Singh S. Singh V. K. Singh V. Singhal T. Sinha B. Sitar M. Sitta T. B. Skaali G. Skorodumovs N. Smirnov R. J. M. Snellings E. H. Solheim C. Sonnabend J. M. Sonneveld F. Soramel A. B. Soto-Hernandez R. Spijkers I. Sputowska J. Staa J. Stachel I. Stan P. J. Steffanic T. Stellhorn S. F. Stiefelmaier D. Stocco I. Storehaug N. J. Strangmann P. Stratmann S. Strazzi A. Sturniolo C. P. Stylianidis A. A. P. Suaide C. Suire A. Suiu M. Sukhanov M. Suljic R. Sultanov V. Sumberia S. Sumowidagdo L. H. Tabares S. F. Taghavi J. Takahashi G. J. Tambave S. Tang Z. Tang J. D. Tapia Takaki N. Tapus L. A. Tarasovicova M. G. Tarzila A. Tauro A. Tavira García G. Tejeda Muñoz L. Terlizzi C. Terrevoli D. Thakur S. Thakur M. Thogersen D. Thomas A. Tikhonov N. Tiltmann A. R. Timmins M. Tkacik T. Tkacik A. Toia R. Tokumoto S. Tomassini K. Tomohiro N. Topilskaya M. Toppi V. V. Torres A. G. Torres Ramos A. Trifiró T. Triloki A. S. Triolo S. Tripathy T. Tripathy S. Trogolo V. Trubnikov W. H. Trzaska T. P. Trzcinski C. Tsolanta R. Tu A. Tumkin R. Turrisi T. S. Tveter K. Ullaland B. Ulukutlu S. Upadhyaya A. Uras G. L. Usai M. Vaid M. Vala N. Valle L. V. R. van Doremalen M. van Leeuwen C. A. van Veen R. J. G. van Weelden P. Vande Vyvre D. Varga Z. Varga P. Vargas Torres M. Vasileiou A. Vasiliev O. Vázquez Doce O. Vazquez Rueda V. Vechernin P. Veen E. Vercellin R. Verma R. Vértesi M. Verweij L. Vickovic Z. Vilakazi O. Villalobos Baillie A. Villani A. Vinogradov T. Virgili M. M. O. Virta A. Vodopyanov B. Volkel M. A. Völkl S. A. Voloshin G. Volpe B. von Haller I. Vorobyev N. Vozniuk J. Vrláková J. Wan C. Wang D. Wang Y. Wang Y. Wang Z. Wang A. Wegrzynek F. T. Weiglhofer S. C. Wenzel J. P. Wessels P. K. Wiacek J. Wiechula J. Wikne G. Wilk J. Wilkinson G. A. Willems B. Windelband M. Winn J. R. Wright W. Wu Y. Wu Z. Xiong R. Xu A. Yadav A. K. Yadav Y. Yamaguchi S. Yang S. Yano E. R. Yeats J. Yi Z. Yin I.-K. Yoo J. H. Yoon H. Yu S. Yuan A. Yuncu V. Zaccolo C. Zampolli F. Zanone N. Zardoshti A. Zarochentsev P. Závada N. Zaviyalov M. Zhalov B. Zhang C. Zhang L. Zhang M. Zhang M. Zhang S. Zhang X. Zhang Y. Zhang Y. Zhang Z. Zhang M. Zhao V. Zherebchevskii Y. Zhi D. Zhou Y. Zhou J. Zhu S. Zhu Y. Zhu S. C. Zugravel N. Zurlo
Title: Observation of the Ω ( 2012 ) baryon at the LHC
Description:
A signal consistent with the Ω ( 2012 ) baryon has been observed with a significance of 15 σ in pp collisions at s = 13     TeV at the LHC.
In this paper, the analysis technique is described and measurements of the mass and width of the Ω ( 2012 ) are reported, along with the first measurement of its transverse-momentum spectrum and yield.
This paper corroborates the observation by the Belle Collaboration of this excited Ω state and the observation that the Ω ( 2012 ) has a rather narrow width for a strongly decaying resonance.
The yield measurement is combined with a statistical thermal model calculation of strange baryon yield ratios to obtain estimates of the Ω ( 2012 ) − → Ξ K ¯ branching ratios.
These results will improve our understanding of the internal structure and mass spectrum of excited baryon states and serve as a baseline for searches regarding modifications of these properties in high-temperature media.

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