Formation of the $\eta_c$ in Two-Photon Collisions at LEP - IN2P3 - Institut national de physique nucléaire et de physique des particules
Journal Articles Physics Letters B Year : 1999

Formation of the $\eta_c$ in Two-Photon Collisions at LEP

M. Acciarri , P. Achard , O. Adriani , M. Aguilar-Benitez , J. Alcaraz , G. Alemanni , J. Allaby , A. Aloisio , M G. Alviggi , G. Ambrosi , H. Anderhub , V P. Andreev , T. Angelescu , F. Anselmo , A. Arefiev , T. Azemoon , T. Aziz , P. Bagnaia , L. Baksay , A. Balandras (1) , R C. Ball , S. Banerjee , Sw. Banerjee , A. Barczyk , R. Barillere , L. Barone , P. Bartalini , M. Basile , R. Battiston , A. Bay , F. Becattini , U. Becker , F. Behner , J. Berdugo , P. Berges , B. Bertucci , B L. Betev , S. Bhattacharya , M. Biasini , A. Biland , J J. Blaising (1) , S C. Blyth , G J. Bobbink , A. Boehm , L. Boldizsar , B. Borgia , D. Bourilkov , M. Bourquin , S. Braccini , J G. Branson , V. Brigljevic , F. Brochu (1) , A. Buffini , A. Buijs , J D. Burger , W J. Burger , J. Busenitz , A. Button , X D. Cai , M. Campanelli , M. Capell , G. Cara Romeo , G. Carlino , a M. Cartacci , J. Casaus , G. Castellini , F. Cavallari , N. Cavallo , C. Cecchi , M. Cerrada , F. Cesaroni , M. Chamizo , y H. Chang , U K. Chaturvedi , M. Chemarin (2) , A. Chen , G. Chen , G M. Chen , H F. Chen , H S. Chen , X. Chereau (1) , G. Chiefari , L. Cifarelli , F. Cindolo , C. Civinini , I. Clare , R. Clare , G. Coignet (1) , a P. Colijn , N. Colino , S. Costantini , F. Cotorobai , B. Cozzoni , B. de La Cruz , A. Csilling , S. Cucciarelli , T S. Dai , J A. van Dalen , R. d'Alessandro , R. de Asmundis , P. Deglon , A. Degre (1) , K. Deiters , D. Della Volpe , P. Denes , F. de Notaristefani , A. de Salvo , M. Diemoz , D. van Dierendonck , F. Di Lodovico , C. Dionisi , M. Dittmar , A. Dominguez , A. Doria , M T. Dova , D. Duchesneau (1) , D. Dufournaud (1) , P. Duinker , I. Duran , H. El Mamouni (3) , A. Engler , F J. Eppling , F C. Erne , P. Extermann , M. Fabre , R. Faccini , M A. Falagan , S. Falciano , A. Favara , J. Fay (2) , O. Fedin , M. Felcini , T. Ferguson , F. Ferroni , H. Fesefeldt , E. Fiandrini , J H. Field , F. Filthaut , P H. Fisher , I. Fisk , G. Forconi , L. Fredj , K. Freudenreich , C. Furetta , Yu. Galaktionov , S N. Ganguli , P. Garcia-Abia , M. Gataullin , S S. Gau , S. Gentile , N. Gheordanescu , S. Giagu , Z F. Gong , G. Grenier (2) , O. Grimm , M W. Gruenewald , R. van Gulik , V K. Gupta , A. Gurtu , L J. Gutay , D. Haas , A. Hasan , D. Hatzifotiadou , T. Hebbeker , A. Herve , P. Hidas , J. Hirschfelder , H. Hofer , G. Holzner , H. Hoorani , S R. Hou , I. Iashvili , B N. Jin , L W. Jones , P. de Jong , I. Josa-Mutuberria , R A. Khan , D. Kamrad , M. Kaur , M N. Kienzle-Focacci , D. Kim , D H. Kim , J K. Kim , S C. Kim , J. Kirkby , D. Kiss , W. Kittel , A. Klimentov , a C. Koenig , A. Kopp , I. Korolko , V. Koutsenko , M. Kraeber , R W. Kraemer , W. Krenz , A. Kunin , P. Lacentre , P. Ladron de Guevara , I. Laktineh (2) , G. Landi , K. Lassila-Perini , P. Laurikainen , A. Lavorato , M. Lebeau , A. A. Lebedev , P. Lebrun (2) , P. Lecomte , P. Lecoq , P. Le Coultre , H J. Lee , J M. Le Goff , R. Leiste , Emilio Leonardi , P. Levtchenko , C. Li , C H. Lin , W T. Lin , F L. Linde , L. Lista , Z A. Liu , W. Lohmann , E. Longo , y S. Lu , K. Luebelsmeyer , C. Luci , D. Luckey , L. Lugnier (2) , L. Luminari , W. Lustermann , W G. Ma , M. Maity , L. Malgeri , A. Malinin , C. Mana , D. Mangeol , P. Marchesini , G. Marian , J.-P. Martin (2) , F. Marzano , G G G. Massaro , K. Mazumdar , R R. Mcneil , S. Mele , L. Merola , M. Meschini , W J. Metzger , M. von Der Mey , D. Migani , A. Mihul , H. Milcent , G. Mirabelli , J. Mnich , G B. Mohanty , P. Molnar , B. Monteleoni , T. Moulik , G.-S. Muanza (2) , F. Muheim , a J M. Muijs , M. Napolitano , F. Nessi-Tedaldi , H. Newman , T. Niessen , A. Nisati , H. Nowak , y D. Oh , G. Organtini , R. Ostonen , C. Palomares , D. Pandoulas , S. Paoletti , P. Paolucci , H K. Park , I H. Park , G. Pascale , G. Passaleva , S. Patricelli , T. Paul , M. Pauluzzi , C. Paus , F. Pauss , D. Peach , M. Pedace , y J. Pei , S. Pensotti , D. Perret-Gallix (1) , B. Petersen , D. Piccolo , M. Pieri , P A. Piroue , E. Pistolesi , V. Plyaskin , M. Pohl , V. Pojidaev , H. Postema , J. Pothier , N. Produit , D O. Prokofiev , D. Prokofiev , J. Quartieri , G. Rahal-Callot , M A. Rahaman , N. Raja , R. Ramelli , P G. Rancoita , G. Raven , P. Razis , D. Ren , M. Rescigno , S. Reucroft , T. van Rhee , S. Riemann , K. Riles , A. Robohm , J. Rodin , B P. Roe , L. Romero , A. Rosca , S. Rosier-Lees (1) , J A. Rubio , D. Ruschmeier , H. Rykaczewski , S. Sarkar , J. Salicio , E. Sanchez , M P. Sanders , M E. Sarakinos , C. Schaefer , V. Schegelsky , S. Schmidt-Kaerst , D. Schmitz , H. Schopper , D J. Schotanus , J. Schwenke , G. Schwering , C. Sciacca , D. Sciarrino , A. Seganti , L. Servoli , S. Shevchenko , N. Shivarov , V. Shoutko , E. Shumilov , A. Shvorob , T. Siedenburg , D. Son , B. B.N. Smith , P. Spillantini , M. Steuer , D P. Stickland , A. Stone , H. Stone , B. Stoyanov , A. Straessner , K. Sudhakar , G. Sultanov , L Z. Sun , H. Suter , J D. Swain , Z. Szillasi , X W. Tang , L. Tauscher , L. Taylor , C. Timmermans , S C C. Ting , S M. Ting , S C. Tonwar , J. Toth , C. Tully , K L. Tung , Y. Uchida , J. Ulbricht , E. Valente , G. Vesztergombi , I. Vetlitsky , D. Vicinanza , G. Viertel , S. Villa , M. Vivargent (1) , S. Vlachos , I. Vodopianov , H. Vogel , H. Vogt , I. Vorobiev , a A. Vorobyov , A. Vorvolakos , M. Wadhwa , W. Wallraff , M. Wang , X L. Wang , Z M. Wang , A. Weber , M. Weber , P. Wienemann , H. Wilkens , S X. Wu , S. Wynhoff , L. Xia , Z Z. Xu , B Z. Yang , C G. Yang , H J. Yang , M. Yang , J B. Ye , S C. Yeh , J M. You , A. Zalite , Yu. Zalite , Z P. Zhang , G Y. Zhu , R Y. Zhu , A. Zichichi , F. Ziegler , G. Zilizi , M. Zoeller
M. Acciarri
  • Function : Author
P. Achard
  • Function : Author
O. Adriani
  • Function : Author
M. Aguilar-Benitez
  • Function : Author
J. Alcaraz
  • Function : Author
G. Alemanni
  • Function : Author
J. Allaby
  • Function : Author
A. Aloisio
  • Function : Author
M G. Alviggi
  • Function : Author
G. Ambrosi
  • Function : Author
H. Anderhub
  • Function : Author
V P. Andreev
  • Function : Author
T. Angelescu
  • Function : Author
F. Anselmo
  • Function : Author
A. Arefiev
  • Function : Author
T. Azemoon
  • Function : Author
T. Aziz
  • Function : Author
P. Bagnaia
  • Function : Author
L. Baksay
  • Function : Author
R C. Ball
  • Function : Author
S. Banerjee
  • Function : Author
Sw. Banerjee
  • Function : Author
A. Barczyk
  • Function : Author
R. Barillere
  • Function : Author
L. Barone
  • Function : Author
P. Bartalini
  • Function : Author
M. Basile
  • Function : Author
R. Battiston
  • Function : Author
A. Bay
  • Function : Author
F. Becattini
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U. Becker
  • Function : Author
F. Behner
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J. Berdugo
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P. Berges
  • Function : Author
B. Bertucci
  • Function : Author
B L. Betev
  • Function : Author
S. Bhattacharya
  • Function : Author
M. Biasini
  • Function : Author
A. Biland
S C. Blyth
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G J. Bobbink
  • Function : Author
A. Boehm
  • Function : Author
L. Boldizsar
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B. Borgia
  • Function : Author
D. Bourilkov
  • Function : Author
M. Bourquin
  • Function : Author
S. Braccini
  • Function : Author
J G. Branson
  • Function : Author
V. Brigljevic
  • Function : Author
A. Buffini
  • Function : Author
A. Buijs
  • Function : Author
J D. Burger
  • Function : Author
W J. Burger
  • Function : Author
J. Busenitz
  • Function : Author
A. Button
  • Function : Author
X D. Cai
  • Function : Author
M. Campanelli
  • Function : Author
M. Capell
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G. Cara Romeo
  • Function : Author
G. Carlino
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a M. Cartacci
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J. Casaus
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G. Castellini
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F. Cavallari
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N. Cavallo
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C. Cecchi
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M. Cerrada
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F. Cesaroni
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M. Chamizo
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y H. Chang
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U K. Chaturvedi
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A. Chen
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G. Chen
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G M. Chen
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H F. Chen
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H S. Chen
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G. Chiefari
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L. Cifarelli
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F. Cindolo
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C. Civinini
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I. Clare
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R. Clare
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a P. Colijn
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N. Colino
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S. Costantini
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F. Cotorobai
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B. Cozzoni
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B. de La Cruz
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A. Csilling
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S. Cucciarelli
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T S. Dai
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J A. van Dalen
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R. d'Alessandro
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R. de Asmundis
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P. Deglon
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K. Deiters
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D. Della Volpe
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P. Denes
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F. de Notaristefani
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A. de Salvo
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M. Diemoz
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D. van Dierendonck
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F. Di Lodovico
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C. Dionisi
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M. Dittmar
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A. Dominguez
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A. Doria
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M T. Dova
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P. Duinker
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I. Duran
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H. El Mamouni
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A. Engler
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F J. Eppling
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F C. Erne
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P. Extermann
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M. Fabre
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R. Faccini
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M A. Falagan
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S. Falciano
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A. Favara
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O. Fedin
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M. Felcini
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T. Ferguson
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F. Ferroni
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E. Fiandrini
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J H. Field
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F. Filthaut
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P H. Fisher
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I. Fisk
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G. Forconi
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L. Fredj
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K. Freudenreich
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C. Furetta
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Yu. Galaktionov
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S N. Ganguli
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P. Garcia-Abia
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M. Gataullin
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S S. Gau
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S. Gentile
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N. Gheordanescu
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S. Giagu
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Z F. Gong
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O. Grimm
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M W. Gruenewald
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R. van Gulik
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V K. Gupta
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A. Gurtu
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L J. Gutay
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A. Hasan
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D. Hatzifotiadou
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T. Hebbeker
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A. Herve
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P. Hidas
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J. Hirschfelder
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H. Hofer
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G. Holzner
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H. Hoorani
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S R. Hou
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I. Iashvili
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B N. Jin
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L W. Jones
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P. de Jong
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I. Josa-Mutuberria
  • Function : Author
R A. Khan
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D. Kamrad
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M. Kaur
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M N. Kienzle-Focacci
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D. Kim
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D H. Kim
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J K. Kim
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S C. Kim
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J. Kirkby
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D. Kiss
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W. Kittel
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A. Klimentov
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a C. Koenig
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A. Kopp
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I. Korolko
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V. Koutsenko
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M. Kraeber
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R W. Kraemer
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W. Krenz
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A. Kunin
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P. Lacentre
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P. Ladron de Guevara
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G. Landi
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K. Lassila-Perini
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P. Laurikainen
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A. Lavorato
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M. Lebeau
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A. A. Lebedev
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P. Lecomte
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P. Lecoq
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P. Le Coultre
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H J. Lee
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J M. Le Goff
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R. Leiste
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Emilio Leonardi
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P. Levtchenko
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C. Li
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C H. Lin
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W T. Lin
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F L. Linde
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L. Lista
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Z A. Liu
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W. Lohmann
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E. Longo
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y S. Lu
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K. Luebelsmeyer
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C. Luci
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D. Luckey
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L. Luminari
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W. Lustermann
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W G. Ma
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M. Maity
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L. Malgeri
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A. Malinin
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C. Mana
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D. Mangeol
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P. Marchesini
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G. Marian
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F. Marzano
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G G G. Massaro
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K. Mazumdar
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R R. Mcneil
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S. Mele
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L. Merola
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M. Meschini
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W J. Metzger
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M. von Der Mey
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D. Migani
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A. Mihul
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H. Milcent
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G. Mirabelli
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J. Mnich
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G B. Mohanty
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P. Molnar
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B. Monteleoni
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T. Moulik
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F. Muheim
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a J M. Muijs
  • Function : Author
M. Napolitano
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F. Nessi-Tedaldi
  • Function : Author
H. Newman
  • Function : Author
T. Niessen
  • Function : Author
A. Nisati
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H. Nowak
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y D. Oh
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G. Organtini
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R. Ostonen
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C. Palomares
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D. Pandoulas
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S. Paoletti
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P. Paolucci
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H K. Park
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I H. Park
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G. Pascale
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G. Passaleva
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S. Patricelli
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T. Paul
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M. Pauluzzi
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C. Paus
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F. Pauss
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D. Peach
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M. Pedace
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y J. Pei
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S. Pensotti
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B. Petersen
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D. Piccolo
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M. Pieri
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P A. Piroue
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E. Pistolesi
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V. Plyaskin
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M. Pohl
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V. Pojidaev
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H. Postema
  • Function : Author
J. Pothier
  • Function : Author
N. Produit
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D O. Prokofiev
  • Function : Author
D. Prokofiev
  • Function : Author
J. Quartieri
  • Function : Author
G. Rahal-Callot
  • Function : Author
M A. Rahaman
  • Function : Author
N. Raja
  • Function : Author
R. Ramelli
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P G. Rancoita
  • Function : Author
G. Raven
  • Function : Author
P. Razis
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D. Ren
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M. Rescigno
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S. Reucroft
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T. van Rhee
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S. Riemann
  • Function : Author
K. Riles
  • Function : Author
A. Robohm
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J. Rodin
  • Function : Author
B P. Roe
  • Function : Author
L. Romero
  • Function : Author
A. Rosca
  • Function : Author
J A. Rubio
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D. Ruschmeier
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H. Rykaczewski
  • Function : Author
S. Sarkar
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J. Salicio
  • Function : Author
E. Sanchez
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M P. Sanders
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M E. Sarakinos
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C. Schaefer
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V. Schegelsky
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S. Schmidt-Kaerst
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D. Schmitz
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H. Schopper
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D J. Schotanus
  • Function : Author
J. Schwenke
  • Function : Author
G. Schwering
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C. Sciacca
  • Function : Author
D. Sciarrino
  • Function : Author
A. Seganti
  • Function : Author
L. Servoli
  • Function : Author
S. Shevchenko
  • Function : Author
N. Shivarov
  • Function : Author
V. Shoutko
  • Function : Author
E. Shumilov
  • Function : Author
A. Shvorob
  • Function : Author
T. Siedenburg
  • Function : Author
D. Son
  • Function : Author
B. B.N. Smith
  • Function : Author
P. Spillantini
  • Function : Author
M. Steuer
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D P. Stickland
  • Function : Author
A. Stone
  • Function : Author
H. Stone
  • Function : Author
B. Stoyanov
  • Function : Author
A. Straessner
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K. Sudhakar
  • Function : Author
G. Sultanov
  • Function : Author
L Z. Sun
  • Function : Author
H. Suter
  • Function : Author
J D. Swain
  • Function : Author
Z. Szillasi
  • Function : Author
X W. Tang
  • Function : Author
L. Tauscher
  • Function : Author
L. Taylor
  • Function : Author
C. Timmermans
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S C C. Ting
  • Function : Author
S M. Ting
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S C. Tonwar
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J. Toth
  • Function : Author
C. Tully
  • Function : Author
K L. Tung
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Y. Uchida
  • Function : Author
J. Ulbricht
  • Function : Author
E. Valente
  • Function : Author
G. Vesztergombi
  • Function : Author
I. Vetlitsky
  • Function : Author
D. Vicinanza
  • Function : Author
G. Viertel
  • Function : Author
S. Villa
  • Function : Author
S. Vlachos
  • Function : Author
I. Vodopianov
  • Function : Author
H. Vogel
  • Function : Author
H. Vogt
  • Function : Author
I. Vorobiev
  • Function : Author
a A. Vorobyov
  • Function : Author
A. Vorvolakos
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M. Wadhwa
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W. Wallraff
  • Function : Author
M. Wang
  • Function : Author
X L. Wang
  • Function : Author
Z M. Wang
  • Function : Author
A. Weber
  • Function : Author
M. Weber
  • Function : Author
P. Wienemann
  • Function : Author
H. Wilkens
  • Function : Author
S X. Wu
  • Function : Author
S. Wynhoff
  • Function : Author
L. Xia
  • Function : Author
Z Z. Xu
  • Function : Author
B Z. Yang
  • Function : Author
C G. Yang
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H J. Yang
  • Function : Author
M. Yang
J B. Ye
  • Function : Author
S C. Yeh
  • Function : Author
J M. You
  • Function : Author
A. Zalite
  • Function : Author
Yu. Zalite
  • Function : Author
Z P. Zhang
  • Function : Author
G Y. Zhu
  • Function : Author
R Y. Zhu
  • Function : Author
A. Zichichi
  • Function : Author
F. Ziegler
  • Function : Author
G. Zilizi
  • Function : Author
M. Zoeller
  • Function : Author

Abstract

The two-photon width $\Gamma_{\gamma\gamma}$ of the $\eta_{\mathrm{c}}$ meson has been measured with the L3 detector at LEP. The $\eta_{\mathrm{c}}$ is studied in the decay modes $\pi^+\pi^-\pi^+\pi^-$, $\pi^+\pi^-$K$^+$K$^-$, K$_s^0$K$^\pm\pi^\mp$, K$^+$K$^-\pi^{0}$, $\pi^+\pi^-\eta$, $\pi^+\pi^-\eta'$, and $\rho^+\rho^-$ using an integrated luminosity of 140 pb$^{-1}$ at $\sqrt{s} \simeq 91$ GeV and of 52 pb$^{-1}$ at $\sqrt{s} \simeq 183$ GeV. The result is $\Gamma_{\gamma\gamma}(\eta_{\mathrm{c}}) = 6.9 \pm 1.7 \mbox{(stat.)} \pm 0.8 \mbox{(sys.)} \pm 2.0$(BR) keV. The $Q^2$ dependence of the $\eta_{\mathrm{c}}$ cross section is studied for $Q^2 < 9$ GeV$^{2}$. It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a $\rho$-pole. In addition, a signal of $29 \pm 11$ events is observed at the $\chi_{\mathrm{c}0}$ mass. Upper limits for the two-photon widths of the $\chi_{\mathrm{c}0}$, $\chi_{\mathrm{c}2}$, and $\eta_{\mathrm{c}}'$ are also given.

Dates and versions

in2p3-00003666 , version 1 (03-11-1999)

Identifiers

Cite

M. Acciarri, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, et al.. Formation of the $\eta_c$ in Two-Photon Collisions at LEP. Physics Letters B, 1999, 461, pp.155-166. ⟨10.1016/S0370-2693(99)00784-4⟩. ⟨in2p3-00003666⟩
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