Threshold cusps and triangle singularities in hadronic reactions
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In this paper, a review of threshold cusps and various triangle singularities in hadronic reactions is presented, paying attention to their manifestations in phenomena related to exotic hadron candidates.Abstract:
The spectrum of hadrons is the manifestation of color confinement of quantum chromodynamics. Hadronic resonances correspond to poles of the S-matrix. Since 2003, lots of new hadron resonant structures were discovered in the mass regions from light mesons to hadrons containing a pair of a heavy quark and an antiquark. Many of them are candidates of exotic hadrons, and they are usually observed as peaks in invariant mass distributions. However, the S-matrix also has kinematical singularities due to the on-shellness of intermediate particles for a process, such as two-body thresholds and triangle singularities, and they can produce peaks as well. On the one hand, such singularities may be misidentified as resonances; on the other hand, they can be used as tools for precision measurements. In this paper, we review the threshold cusps and various triangle singularities in hadronic reactions, paying attention to their manifestations in phenomena related to exotic hadron candidates.read more
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References
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Book
Quantum mechanics: Non-relativistic theory,
TL;DR: The basic concepts of quantum mechanics Energy and momentum Schrodinger's equation Angular momentum Perturbation theory Spin The identity of particles The atom The theory of symmetry Polyatomic molecules Motion in a magnetic field Nuclear structure Elastic collisions Mathematical appendices.
Journal ArticleDOI
Observation of a Narrow Charmoniumlike State in Exclusive B±→K±π+π-J/ψ Decays
Suyong Choi,S. L. Olsen,Kazuo Abe,T. Abe,I. Adachi,Byoung Sup Ahn,Hiroaki Aihara,K. Akai,M. Akatsu,M. Akemoto,Y. Asano,Tsukasa Aso,V.M. Aulchenko,T. Aushev,A. M. Bakich,Yong Ban,S. Banerjee,A. Bondar,A. Bozek,M. Bračko,Jolanta Brodzicka,T. E. Browder,P. Chang,Y. Chao,K. F. Chen,Byung Gu Cheon,R. Chistov,Y. Choi,Young-Il Choi,M. Danilov,L. Y. Dong,A. Drutskoy,Semen Eidelman,V. Eiges,J.W. Flanagan,Chikara Fukunaga,Kazuro Furukawa,N. Gabyshev,T. J. Gershon,B. Golob,H. Guler,R. Guo,C. Hagner,F. Handa,T. Hara,N. C. Hastings,H. Hayashii,Masashi Hazumi,L. Hinz,Y. Hoshi,W. S. Hou,Y. B. Hsiung,Y. B. Hsiung,H. C. Huang,T. Iijima,K. Inami,A. Ishikawa,R. Itoh,M. Iwasaki,Y. Iwasaki,J. H. Kang,S. U. Kataoka,N. Katayama,H. Kawai,T. Kawasaki,H. Kichimi,Eiji Kikutani,H. J. Kim,Hyunwoo Kim,Jung-Hyun Kim,Seong Keun Kim,K. Kinoshita,Haruyo Koiso,Patrick Koppenburg,S. Korpar,P. Križan,P. Krokovny,Suneel Kumar,A.S. Kuzmin,J. S. Lange,G. Leder,S. H. Lee,T. Lesiak,S. W. Lin,D. Liventsev,J. MacNaughton,Gobinda Majumder,F. Mandl,Daniel Robert Marlow,T. Matsumoto,Shinichiro Michizono,Toshihiro Mimashi,W. A. Mitaroff,K. Miyabayashi,H. Miyake,D. Mohapatra,G. R. Moloney,T. Nagamine,Yasushi Nagasaka,T. Nakadaira,Takashi Nakamura,M. Nakao,Z. Natkaniec,S. Nishida,O. Nitoh,T. Nozaki,S. Ogawa,Y. Ogawa,K. Ohmi,Yukiyoshi Ohnishi,T. Ohshima,Norihito Ohuchi,Katsunobu Oide,T. Okabe,S. Okuno,W. Ostrowicz,H. Ozaki,H. Palka,H. K. Park,N. Parslow,L. E. Piilonen,Hiroyuki Sagawa,S. Saitoh,Y. Sakai,T. R. Sarangi,M. Satapathy,A. Satpathy,O. Schneider,A. J. Schwartz,S. Semenov,K. Senyo,Rolf Seuster,M. E. Sevior,H. Shibuya,Tetsuo Shidara,B. Shwartz,V.A. Sidorov,N. Soni,S. Stanič,S. Stanič,M. Starič,Akira Sugiyama,T. Sumiyoshi,S. Y. Suzuki,F. Takasaki,K. Tamai,N. Tamura,M. H. Tanaka,Masafumi Tawada,G. N. Taylor,Y. Teramoto,T. Tomura,K. Trabelsi,T. Tsukamoto,S. Uehara,K. Ueno,Y. Unno,S. Uno,G. S. Varner,Kevin Varvell,C. C. Wang,C. H. Wang,J. G. Wang,Y. Watanabe,E. Won,B. D. Yabsley,Yasuhiko Yamada,A. Yamaguchi,Y. Yamashita,H. Yanai,Heyoung Yang,J. Ying,M. Yoshida,C. C. Zhang,Zhenyu Zhang,D. Žontar +175 more
TL;DR: In this article, a narrow charmonium-like state produced in the exclusive decay process B+/--->K+/-pi(+)pi(-)J/psi has been observed, which has a mass of 3872.0+/-0.6(stat)+/- 0.5(syst) MeV.
Book
The Analytic S-Matrix
TL;DR: In this paper, the authors present analytic properties of perturbation theory and asymptotic behavior of S-matrix theory with respect to perturbations and S-Matrix theory.
Journal ArticleDOI
Observation of $J/\psi p$ Resonances Consistent with Pentaquark States in $\Lambda_b^0 \to J/\psi K^- p$ Decays
Roel Aaij,Bernardo Adeva,Marco Adinolfi,A. A. Affolder,Ziad Ajaltouni,Simon Akar,Johannes Albrecht,Federico Alessio,Michael Alexander,S. Ali,G. Alkhazov,P. Alvarez Cartelle,A. A. Alves,Sandra Amato,S. Amerio,Yasmine Amhis,Liupan An,Lucio Anderlini,J. Anderson,Guido Andreassi,M. Andreotti,J. E. Andrews,Robert Appleby,O. Aquines Gutierrez,Flavio Archilli,P. d'Argent,A. Artamonov,Marina Artuso,Elie Aslanides,G. Auriemma,M. Baalouch,Sebastian Bachmann,John Back,A. Badalov,C. Baesso,Wander Baldini,Roger Barlow,C. Barschel,Sergey Barsuk,William Barter,Varvara Batozskaya,Vincenzo Battista,A. Bay,L. Beaucourt,J. Beddow,Franco Bedeschi,Ignacio Bediaga,Lennaert Bel,Violaine Bellee,Nicoletta Belloli,Ivan Belyaev,E. Ben-Haim,G. Bencivenni,Sean Benson,J. Benton,Alexander Berezhnoy,Roland Bernet,A. Bertolin,Marc-Olivier Bettler,M. van Beuzekom,A. Bien,Simone Bifani,Pierre Billoir,T. Bird,Alex Birnkraut,Andrea Bizzeti,Thomas Blake,F. Blanc,J. Blouw,S. Blusk,V. Bocci,A.E. Bondar,Nikolay Bondar,W. Bonivento,Silvia Borghi,Martino Borsato,Themistocles Bowcock,E. Bowen,C. Bozzi,Svende Braun,M. Britsch,T. Britton,Jolanta Brodzicka,N. H. Brook,Albert Bursche,Jan Buytaert,Sandro Cadeddu,R. Calabrese,Marta Calvi,M. Calvo Gomez,P. Campana,D. Campora Perez,Lorenzo Capriotti,Angelo Carbone,Giovanni Carboni,Roberta Cardinale,Alessandro Cardini,Paolo Carniti,L. Carson,K. Carvalho Akiba,Gianluigi Casse,L. Cassina,L. Castillo Garcia,Marco Cattaneo,Ch. Cauet,G. Cavallero,R. Cenci,M. Charles,Ph. Charpentier,Maximilien Chefdeville,Sai-Juan Chen,S.-F. Cheung,N. Chiapolini,M. Chrzaszcz,X. Cid Vidal,G. Ciezarek,P. E. L. Clarke,Marco Clemencic,H. V. Cliff,J. Closier,Victor Coco,Julien Cogan,E. Cogneras,Violetta Cogoni,Lucian Cojocariu,G. Collazuol,P. Collins,Albert Comerma-Montells,A. Contu,A. Cook,M. Coombes,S. Coquereau,G. Corti,M. Corvo,B. Couturier,G. A. Cowan,D. C. Craik,Andrew Crocombe,M. Cruz Torres,S. Cunliffe,R. Currie,Carmelo D'Ambrosio,Elena Dall'Occo,Jeremy Dalseno,P. N. Y. David,A. Davis,K. De Bruyn,S. De Capua,M. De Cian,J. M. De Miranda,L. De Paula,P. De Simone,Cameron Thomas Dean,D. Decamp,M. Deckenhoff,L. Del Buono,Nicolas Déléage,Moritz Demmer,Denis Derkach,Olivier Deschamps,Francesco Dettori,B. Dey,A. Di Canto,F. Di Ruscio,Hans Dijkstra,S. Donleavy,F. Dordei,Marco Dorigo,A. Dosil Suárez,D. Dossett,A. Dovbnya,Karlis Dreimanis,Laurent Dufour,Giulio Dujany,F. Dupertuis,P. Durante,R. Dzhelyadin,A. Dziurda,A. Dzyuba,S. Easo,Ulrik Egede,V. Egorychev,S.I. Eidelman,Stephan Eisenhardt,U. Eitschberger,R. Ekelhof,Lars Eklund,I. El Rifai,Ch. Elsasser,Scott Ely,S. Esen,Hal Evans,Timothy Evans,A. Falabella,Christian Färber,Nathanael Farley,S. Farry,RF Fay,D. Ferguson,V. Fernandez Albor,Frank Ferrari,F. Ferreira Rodrigues,M. Ferro-Luzzi,S. Filippov,Marco Fiore,Massimiliano Fiorini,Miroslaw Firlej,C. Fitzpatrick,Tomasz Fiutowski,Klaus Fohl,P. Fol,Marianna Fontana,F. Fontanelli,Roger Forty,Oscar De Aguiar Francisco,Markus Frank,Christoph Frei,M. Frosini,J. Fu,E. Furfaro,A. Gallas Torreira,D. Galli,Stefano Gallorini,Silvia Gambetta,M. Gandelman,Paolo Gandini,Y. N. Gao,J. García Pardiñas,J. Garra Tico,L. Garrido,David Gascon,C. Gaspar,R. Gauld,Laura Gavardi,Giulio Gazzoni,Angelo Geraci,David Gerick,E. Gersabeck,Marco Gersabeck,T. J. Gershon,Ph. Ghez,A. Gianelle,S. Gianì,V. Gibson,Olivier Göran Girard,L. Giubega,V. V. Gligorov,C. Göbel,Dmitry Golubkov,A. Golutvin,A. Gomes,Claudio Gotti,M. Grabalosa Gándara,R. Graciani Diaz,L. A. Granado Cardoso,E. Grauges,Elena Graverini,G. Graziani,A. Grecu,E. Greening,S. Gregson,P. Griffith,L. Grillo,O. Grünberg,B. Gui,E. Gushchin,Yu. Guz,T. Gys,Thomas Hadavizadeh,C. Hadjivasiliou,G. Haefeli,C. Haen,S. C. Haines,S. Hall,B. Hamilton,Xiaoxue Han,S. Hansmann-Menzemer,Neville Harnew,S. T. Harnew,J. Harrison,J. He,T. Head,V. Heijne,Karol Hennessy,P. Henrard,Louis Henry,J. A. Hernando Morata,E. van Herwijnen,M. Heß,A. Hicheur,D. Hill,M. Hoballah,C. Hombach,W. D. Hulsbergen,Thibaud Humair,N. Hussain,D. E. Hutchcroft,D. Hynds,Marek Idzik,Philip Ilten,R. Jacobsson,A. Jaeger,J. Jalocha,E. Jans,A. Jawahery,F. F. Jing,Malcolm John,D. R. Johnson,C. R. Jones,C. Joram,B. Jost,Nathan Jurik,S. Kandybei,W. Kanso,M. Karacson,T. M. Karbach,S. Karodia,Matthieu Kecke,Matthew Kelsey,I. R. Kenyon,Matthew Kenzie,Tjeerd Ketel,Basem Khanji,C. Khurewathanakul,S. Klaver,Konrad Klimaszewski,O. Kochebina,Michael Kolpin,I. Komarov,R. F. Koopman,Patrick Koppenburg,Mohamad Kozeiha,L. Kravchuk,K. Kreplin,Michal Kreps,G. Krocker,P. Krokovny,F. Kruse,Wojciech Krzemien,Wojciech Kucewicz,Marcin Kucharczyk,V. Kudryavtsev,Axel Kevin Kuonen,K. Kurek,T. Kvaratskheliya,D. Lacarrere,G. D. Lafferty,A. Lai,D. Lambert,G. Lanfranchi,C. Langenbruch,B. Langhans,T. E. Latham,C. Lazzeroni,R. Le Gac,J. van Leerdam,J. P. Lees,R. Lefèvre,Alexander Leflat,J. Lefrançois,Olivier Leroy,T. Lesiak,B. Leverington,Yang Li,Tatiana Likhomanenko,M. Liles,R. Lindner,C. Linn,Federica Lionetto,B. X. Liu,Xia-Ji Liu,David Loh,I. Longstaff,J. H. Lopes,D. Lucchesi,M. Lucio Martinez,H. Luo,Anna Lupato,E. Luppi,O. Lupton,N. Lusardi,A. Lusiani,F. Machefert,F. Maciuc,O. Maev,Kevin Maguire,S. Malde,Alexander Malinin,Giulia Manca,G. Mancinelli,P. M. Manning,A. Mapelli,J. Maratas,Jean François Marchand,U. Marconi,C. Marin Benito,Pietro Marino,J. Marks,G. Martellotti,Morgan Martin,Maurizio Martinelli,D. Martinez Santos,F. Martinez Vidal,D. Martins Tostes,A. Massafferri,R. Matev,Abhijit Mathad,Z. Mathe,C. Matteuzzi,Andrea Mauri,Brice Maurin,A. Mazurov,M. McCann,J. McCarthy,A. McNab,R. McNulty,B. T. Meadows,F. Meier,M. Meissner,D. Melnychuk,M. Merk,Diego Alejandro Milanes,M. N. Minard,Dominik Stefan Mitzel,J. Molina Rodriguez,I. A. Monroy,S. Monteil,M. Morandin,P. Morawski,A. Mordà,M. J. Morello,Jakub Moron,Adam Benjamin Morris,R. Mountain,F. Muheim,Janine Müller,K. Müller,Vanessa Müller,M. Mussini,B. Muster,P. Naik,Tatsuya Nakada,R. Nandakumar,Anita Nandi,I. Nasteva,M. Needham,N. Neri,Sebastian Neubert,N. Neufeld,Max Neuner,A. D. Nguyen,T. D. Nguyen,Chung Nguyen-Mau,V. Niess,R. Niet,Nikolay Nikitin,T. Nikodem,D. Ninci,A. Novoselov,Daniel Patrick O'Hanlon,Agnieszka Oblakowska-Mucha,V. Obraztsov,S. Ogilvy,O. Okhrimenko,Rudolf Oldeman,C. J. G. Onderwater,B. Osorio Rodrigues,J. M. Otalora Goicochea,A. Otto,P. Owen,A. Oyanguren,A. Palano,F. Palombo,M. Palutan,J. Panman,A. Papanestis,M. Pappagallo,L. L. Pappalardo,Cheryl Pappenheimer,C. Parkes,G. Passaleva,G. D. Patel,M. Patel,C. Patrignani,A. Pearce,Antonio Pellegrino,G. Penso,M. Pepe Altarelli,S. Perazzini,P. Perret,L. Pescatore,Konstantinos Petridis,A. Petrolini,Marco Petruzzo,E. Picatoste Olloqui,B. Pietrzyk,T. Pilař,D. Pinci,A. Pistone,Alessio Piucci,S. Playfer,M. Plo Casasus,Tuomas Poikela,F. Polci,Anton Poluektov,I. Polyakov,E. Polycarpo,A. Popov,Dmitry Popov,B. Popovici,C. Potterat,Eugenia Price,J. D. Price,J. Prisciandaro,A. Pritchard,C. Prouve,Valery Pugatch,A. Puig Navarro,G. Punzi,W. Qian,Renato Quagliani,B. Rachwal,Jonas Rademacker,M. Rama,M. S. Rangel,I. Raniuk,N. Rauschmayr,G. Raven,Federico Redi,S. Reichert,M. M. Reid,A. C. dos Reis,S. Ricciardi,Sophie Richards,Mariana Rihl,Kurt Rinnert,V. Rives Molina,Patrick Robbe,A. B. Rodrigues,E. Rodrigues,J. A. Rodriguez Lopez,P. Rodriguez Perez,S. Roiser,V. Romanovsky,A. Romero Vidal,John William Ronayne,M. Rotondo,J. Rouvinet,T. Ruf,P. Ruiz Valls,J. J. Saborido Silva,N. Sagidova,P. Sail,Biagio Saitta,V. Salustino Guimaraes,C. Sanchez Mayordomo,B. Sanmartin Sedes,R. Santacesaria,C. Santamarina Rios,Marco Santimaria,E. Santovetti,Alessio Sarti,C. Satriano,A. Satta,Daniel Martin Saunders,D. Savrina,Manuel Schiller,H. Schindler,M. Schlupp,M. Schmelling,Timon Schmelzer,B. Schmidt,O. Schneider,A. Schopper,Maxime Schubiger,M. H. Schune,R. Schwemmer,Barbara Sciascia,A. Sciubba,A. Semennikov,Nicola Serra,J. Serrano,Lorenzo Sestini,Paul Seyfert,M. Shapkin,I. Shapoval,Y. Shcheglov,Tara Shears,L. Shekhtman,V. Shevchenko,A. Shires,Benedetto Gianluca Siddi,R. Silva Coutinho,G. Simi,M. Sirendi,N. Skidmore,I. O. Skillicorn,Tomasz Skwarnicki,E. S. Smith,Iwan Thomas Smith,J. R. Smith,M. Smith,H. L. Snoek,M. D. Sokoloff,F. J. P. Soler,F. Soomro,D. Souza,B. Souza De Paula,B. Spaan,P. Spradlin,Srikanth Sridharan,F. Stagni,Marian Stahl,Stephen M. Stahl,Slavomira Stefkova,O. Steinkamp,Oleg Stenyakin,S. Stevenson,S. Stoica,Sheldon Stone,B. Storaci,S. Stracka,M. Straticiuc,U. Straumann,L. Sun,W. Sutcliffe,Krzysztof Swientek,S. Swientek,V. Syropoulos,M. Szczekowski,P. Szczypka,Tomasz Szumlak,Stephane T'Jampens,Andrey Tayduganov,Tobias Tekampe,M. Teklishyn,G. Tellarini,F. Teubert,C. Thomas,E. Thomas,J. van Tilburg,V. Tisserand,M. Tobin,J. Todd,S. Tolk,L. Tomassetti,D. Tonelli,S. Topp-Joergensen,N. Torr,E. Tournefier,S. Tourneur,K. Trabelsi,M. T. Tran,M. Tresch,Ana Trisovic,A. Tsaregorodtsev,P. Tsopelas,N. Tuning,A. Ukleja,Andrey Ustyuzhanin,U. Uwer,Claudia Vacca,V. Vagnoni,G. Valenti,A. Vallier,R. Vazquez Gomez,P. Vazquez Regueiro,C. Vázquez Sierra,S. Vecchi,Jaap Velthuis,M. Veltri,G. Veneziano,M. Vesterinen,B. Viaud,D. Vieira,M. Vieites Diaz,Xavier Vilasis-Cardona,A. Vollhardt,D. Volyanskyy,D. Voong,A. Vorobyev,V. Vorobyev,C. Voß,J. A. de Vries,Roland Waldi,C. Wallace,R. Wallace,J. J. Walsh,S. Wandernoth,Jing Wang,D. R. Ward,N. K. Watson,D. Websdale,Andreas Weiden,Mark Whitehead,G. Wilkinson,Mark Wilkinson,Mark Richard James Williams,M. P. Williams,Thomas N. Williams,F. F. Wilson,J. Wimberley,J. Wishahi,W. Wislicki,M. Witek,G. Wormser,S. A. Wotton,S. Wright,K. Wyllie,Y. Xie,Zhirui Xu,Zishuo Yang,J. M. Yu,Xuhao Yuan,O. Yushchenko,M. Zangoli,Mikhail Zavertyaev,L. Zhang,Yejin Zhang,A. Zhelezov,A. Zhokhov,L. Zhong,Stefano Zucchelli +722 more
TL;DR: In this article, the pentaquark-charmonium states were observed in the J/ψp channel in Λ0b→J/K−p decays and the significance of these resonances is more than 9 standard deviations.