Observation of a broad structure in the pi+ pi- J/psi mass spectrum around 4.26 GeV/c2

B Aubert; R Barate; D Boutigny; F Couderc; Y Karyotakis; J P Lees; V Poireau; V Tisserand; A Zghiche; E Grauges; A Palano; M Pappagallo; A Pompili; J C Chen; N D Qi; G Rong; P Wang; Y S Zhu; G Eigen; I Ofte; B Stugu; G S Abrams; M Battaglia; A B Breon; D N Brown; J Button-Shafer; R N Cahn; E Charles; C T Day; M S Gill; A V Gritsan; Y Groysman; R G Jacobsen; R W Kadel; J Kadyk; L T Kerth; Yu G Kolomensky; G Kukartsev; G Lynch; L M Mir; P J Oddone; T J Orimoto; M Pripstein; N A Roe; M T Ronan; W A Wenzel; M Barrett; K E Ford; T J Harrison; A J Hart; C M Hawkes; S E Morgan; A T Watson; M Fritsch; K Goetzen; T Held; H Koch; B Lewandowski; M Pelizaeus; K Peters; T Schroeder; M Steinke; J T Boyd; J P Burke; N Chevalier; W N Cottingham; T Cuhadar-Donszelmann; B G Fulsom; C Hearty; N S Knecht; T S Mattison; J A McKenna; A Khan; P Kyberd; M Saleem; L Teodorescu; A E Blinov; V E Blinov; A D Bukin; V P Druzhinin; V B Golubev; E A Kravchenko; A P Onuchin; S I Serednyakov; Yu I Skovpen; E P Solodov; A N Yushkov; D Best; M Bondioli; M Bruinsma; M Chao; S Curry; I Eschrich; D Kirkby; A J Lankford; P Lund; M Mandelkern; R K Mommsen; W Roethel; D P Stoker; C Buchanan; B L Hartfiel; A J R Weinstein; S D Foulkes; J W Gary; O Long; B C Shen; K Wang; L Zhang; D del Re; H K Hadavand; E J Hill; D B MacFarlane; H P Paar; S Rahatlou; V Sharma; J W Berryhill; C Campagnari; A Cunha; B Dahmes; T M Hong; M A Mazur; J D Richman; W Verkerke; T W Beck; A M Eisner; C J Flacco; C A Heusch; J Kroseberg; W S Lockman; G Nesom; T Schalk; B A Schumm; A Seiden; P Spradlin; D C Williams; M G Wilson; J Albert; E Chen; G P Dubois-Felsmann; A Dvoretskii; D G Hitlin; I Narsky; T Piatenko; F C Porter; A Ryd; A Samuel; R Andreassen; S Jayatilleke; G Mancinelli; B T Meadows; M D Sokoloff; F Blanc; P Bloom; S Chen; W T Ford; J F Hirschauer; A Kreisel; U Nauenberg; A Olivas; P Rankin; W O Ruddick; J G Smith; K A Ulmer; S R Wagner; J Zhang; A Chen; E A Eckhart; A Soffer; W H Toki; R J Wilson; Q Zeng; D Altenburg; E Feltresi; A Hauke; B Spaan; T Brandt; J Brose; M Dickopp; V Klose; H M Lacker; R Nogowski; S Otto; A Petzold; G Schott; J Schubert; K R Schubert; R Schwierz; J E Sundermann; D Bernard; G R Bonneaud; P Grenier; S Schrenk; Ch Thiebaux; G Vasileiadis; M Verderi; D J Bard; P J Clark; W Gradl; F Muheim; S Playfer; Y Xie; M Andreotti; V Azzolini; D Bettoni; C Bozzi; R Calabrese; G Cibinetto; E Luppi; M Negrini; L Piemontese; F Anulli; R Baldini-Ferroli; A Calcaterra; R de Sangro; G Finocchiaro; P Patteri; I M Peruzzi; M Piccolo; A Zallo; A Buzzo; R Capra; R Contri; M Lo Vetere; M Macri; M R Monge; S Passaggio; C Patrignani; E Robutti; A Santroni; S Tosi; G Brandenburg; K S Chaisanguanthum; M Morii; E Won; J Wu; R S Dubitzky; U Langenegger; J Marks; S Schenk; U Uwer; W Bhimji; D A Bowerman; P D Dauncey; U Egede; R L Flack; J R Gaillard; G W Morton; J A Nash; M B Nikolich; G P Taylor; W P Vazquez; M J Charles; W F Mader; U Mallik; A K Mohapatra; J Cochran; H B Crawley; V Eyges; W T Meyer; S Prell; E I Rosenberg; A E Rubin; J Yi; N Arnaud; M Davier; X Giroux; G Grosdidier; A Höcker; F Le Diberder; V Lepeltier; A M Lutz; A Oyanguren; T C Petersen; M Pierini; S Plaszczynski; S Rodier; P Roudeau; M H Schune; A Stocchi; G Wormser; C H Cheng; D J Lange; M C Simani; D M Wright; A J Bevan; C A Chavez; I J Forster; J R Fry; E Gabathuler; R Gamet; K A George; D E Hutchcroft; R J Parry; D J Payne; K C Schofield; C Touramanis; C M Cormack; F Di Lodovico; W Menges; R Sacco; C L Brown; G Cowan; H U Flaecher; M G Green; D A Hopkins; P S Jackson; T R McMahon; S Ricciardi; F Salvatore; D Brown; C L Davis; J Allison; N R Barlow; R J Barlow; C L Edgar; M C Hodgkinson; M P Kelly; G D Lafferty; M T Naisbit; J C Williams; C Chen; W D Hulsbergen; A Jawahery; D Kovalskyi; C K Lae; D A Roberts; G Simi; G Blaylock; C Dallapiccola; S S Hertzbach; R Kofler; V B Koptchev; X Li; T B Moore; S Saremi; H Staengle; S Willocq; R Cowan; K Koeneke; G Sciolla; S J Sekula; M Spitznagel; F Taylor; R K Yamamoto; H Kim; P M Patel; S H Robertson; A Lazzaro; V Lombardo; F Palombo; J M Bauer; L Cremaldi; V Eschenburg; R Godang; R Kroeger; J Reidy; D A Sanders; D J Summers; H W Zhao; S Brunet; D Côté; P Taras; B Viaud; H Nicholson; N Cavallo; G De Nardo; F Fabozzi; C Gatto; L Lista; D Monorchio; P Paolucci; D Piccolo; C Sciacca; M Baak; H Bulten; G Raven; H L Snoek; L Wilden; C P Jessop; J M LoSecco; T Allmendinger; G Benelli; K K Gan; K Honscheid; D Hufnagel; P D Jackson; H Kagan; R Kass; T Pulliam; A M Rahimi; R Ter-Antonyan; Q K Wong; J Brau; R Frey; O Igonkina; M Lu; C T Potter; N B Sinev; D Strom; J Strube; E Torrence; F Galeazzi; M Margoni; M Morandin; M Posocco; M Rotondo; F Simonetto; R Stroili; C Voci; M Benayoun; H Briand; J Chauveau; P David; L Del Buono; Ch de la Vaissière; O Hamon; M J J John; Ph Leruste; J Malclès; J Ocariz; L Roos; G Therin; P K Behera; L Gladney; Q H Guo; J Panetta; M Biasini; R Covarelli; S Pacetti; M Pioppi; C Angelini; G Batignani; S Bettarini; F Bucci; G Calderini; M Carpinelli; R Cenci; F Forti; M A Giorgi; A Lusiani; G Marchiori; M Morganti; N Neri; E Paoloni; M Rama; G Rizzo; J Walsh; M Haire; D Judd; D E Wagoner; J Biesiada; N Danielson; P Elmer; Y P Lau; C Lu; J Olsen; A J S Smith; A V Telnov; F Bellini; G Cavoto; A D'Orazio; E Di Marco; R Faccini; F Ferrarotto; F Ferroni; M Gaspero; L Li Gioi; M A Mazzoni; S Morganti; G Piredda; F Polci; F Safai Tehrani; C Voena; H Schröder; G Wagner; R Waldi; T Adye; N De Groot; B Franek; G P Gopal; E O Olaiya; F F Wilson; R Aleksan; S Emery; A Gaidot; S F Ganzhur; P-F Giraud; G Graziani; G Hamel de Monchenault; W Kozanecki; M Legendre; G W London; B Mayer; G Vasseur; Ch Yèche; M Zito; M V Purohit; A W Weidemann; J R Wilson; F X Yumiceva; T Abe; M T Allen; D Aston; N van Bakel; R Bartoldus; N Berger; A M Boyarski; O L Buchmueller; R Claus; J P Coleman; M R Convery; M Cristinziani; J C Dingfelder; D Dong; J Dorfan; D Dujmic; W Dunwoodie; S Fan; R C Field; T Glanzman; S J Gowdy; T Hadig; V Halyo; C Hast; T Hryn'ova; W R Innes; M H Kelsey; P Kim; M L Kocian; D W G S Leith; J Libby; S Luitz; V Luth; H L Lynch; H Marsiske; R Messner; D R Muller; C P O'Grady; V E Ozcan; A Perazzo; M Perl; B N Ratcliff; A Roodman; A A Salnikov; R H Schindler; J Schwiening; A Snyder; J Stelzer; D Su; M K Sullivan; K Suzuki; S Swain; J M Thompson; J Va'vra; M Weaver; W J Wisniewski; M Wittgen; D H Wright; A K Yarritu; K Yi; C C Young; P R Burchat; A J Edwards; S A Majewski; B A Petersen; C Roat; M Ahmed; S Ahmed; M S Alam; J A Ernst; M A Saeed; F R Wappler; S B Zain; W Bugg; M Krishnamurthy; S M Spanier; R Eckmann; J L Ritchie; A Satpathy; R F Schwitters; J M Izen; I Kitayama; X C Lou; G Williams; S Ye; F Bianchi; M Bona; F Gallo; D Gamba; M Bomben; L Bosisio; C Cartaro; F Cossutti; G Della Ricca; S Dittongo; S Grancagnolo; L Lanceri; L Vitale; F Martinez-Vidal; R S Panvini; Sw Banerjee; B Bhuyan; C M Brown; D Fortin; K Hamano; R Kowalewski; J M Roney; R J Sobie; J J Back; P F Harrison; T E Latham; G B Mohanty; H R Band; X Chen; B Cheng; S Dasu; M Datta; A M Eichenbaum; K T Flood; M Graham; J J Hollar; J R Johnson; P E Kutter; H Li; R Liu; B Mellado; A Mihalyi; Y Pan; R Prepost; P Tan; J H von Wimmersperg-Toeller; S L Wu; Z Yu; H Neal; BABAR Collaboration

doi:10.1103/PhysRevLett.95.142001

Observation of a broad structure in the pi+ pi- J/psi mass spectrum around 4.26 GeV/c2

Phys Rev Lett. 2005 Sep 30;95(14):142001. doi: 10.1103/PhysRevLett.95.142001. Epub 2005 Sep 28.

Authors

B Aubert¹, R Barate, D Boutigny, F Couderc, Y Karyotakis, J P Lees, V Poireau, V Tisserand, A Zghiche, E Grauges, A Palano, M Pappagallo, A Pompili, J C Chen, N D Qi, G Rong, P Wang, Y S Zhu, G Eigen, I Ofte, B Stugu, G S Abrams, M Battaglia, A B Breon, D N Brown, J Button-Shafer, R N Cahn, E Charles, C T Day, M S Gill, A V Gritsan, Y Groysman, R G Jacobsen, R W Kadel, J Kadyk, L T Kerth, Yu G Kolomensky, G Kukartsev, G Lynch, L M Mir, P J Oddone, T J Orimoto, M Pripstein, N A Roe, M T Ronan, W A Wenzel, M Barrett, K E Ford, T J Harrison, A J Hart, C M Hawkes, S E Morgan, A T Watson, M Fritsch, K Goetzen, T Held, H Koch, B Lewandowski, M Pelizaeus, K Peters, T Schroeder, M Steinke, J T Boyd, J P Burke, N Chevalier, W N Cottingham, T Cuhadar-Donszelmann, B G Fulsom, C Hearty, N S Knecht, T S Mattison, J A McKenna, A Khan, P Kyberd, M Saleem, L Teodorescu, A E Blinov, V E Blinov, A D Bukin, V P Druzhinin, V B Golubev, E A Kravchenko, A P Onuchin, S I Serednyakov, Yu I Skovpen, E P Solodov, A N Yushkov, D Best, M Bondioli, M Bruinsma, M Chao, S Curry, I Eschrich, D Kirkby, A J Lankford, P Lund, M Mandelkern, R K Mommsen, W Roethel, D P Stoker, C Buchanan, B L Hartfiel, A J R Weinstein, S D Foulkes, J W Gary, O Long, B C Shen, K Wang, L Zhang, D del Re, H K Hadavand, E J Hill, D B MacFarlane, H P Paar, S Rahatlou, V Sharma, J W Berryhill, C Campagnari, A Cunha, B Dahmes, T M Hong, M A Mazur, J D Richman, W Verkerke, T W Beck, A M Eisner, C J Flacco, C A Heusch, J Kroseberg, W S Lockman, G Nesom, T Schalk, B A Schumm, A Seiden, P Spradlin, D C Williams, M G Wilson, J Albert, E Chen, G P Dubois-Felsmann, A Dvoretskii, D G Hitlin, I Narsky, T Piatenko, F C Porter, A Ryd, A Samuel, R Andreassen, S Jayatilleke, G Mancinelli, B T Meadows, M D Sokoloff, F Blanc, P Bloom, S Chen, W T Ford, J F Hirschauer, A Kreisel, U Nauenberg, A Olivas, P Rankin, W O Ruddick, J G Smith, K A Ulmer, S R Wagner, J Zhang, A Chen, E A Eckhart, A Soffer, W H Toki, R J Wilson, Q Zeng, D Altenburg, E Feltresi, A Hauke, B Spaan, T Brandt, J Brose, M Dickopp, V Klose, H M Lacker, R Nogowski, S Otto, A Petzold, G Schott, J Schubert, K R Schubert, R Schwierz, J E Sundermann, D Bernard, G R Bonneaud, P Grenier, S Schrenk, Ch Thiebaux, G Vasileiadis, M Verderi, D J Bard, P J Clark, W Gradl, F Muheim, S Playfer, Y Xie, M Andreotti, V Azzolini, D Bettoni, C Bozzi, R Calabrese, G Cibinetto, E Luppi, M Negrini, L Piemontese, F Anulli, R Baldini-Ferroli, A Calcaterra, R de Sangro, G Finocchiaro, P Patteri, I M Peruzzi, M Piccolo, A Zallo, A Buzzo, R Capra, R Contri, M Lo Vetere, M Macri, M R Monge, S Passaggio, C Patrignani, E Robutti, A Santroni, S Tosi, G Brandenburg, K S Chaisanguanthum, M Morii, E Won, J Wu, R S Dubitzky, U Langenegger, J Marks, S Schenk, U Uwer, W Bhimji, D A Bowerman, P D Dauncey, U Egede, R L Flack, J R Gaillard, G W Morton, J A Nash, M B Nikolich, G P Taylor, W P Vazquez, M J Charles, W F Mader, U Mallik, A K Mohapatra, J Cochran, H B Crawley, V Eyges, W T Meyer, S Prell, E I Rosenberg, A E Rubin, J Yi, N Arnaud, M Davier, X Giroux, G Grosdidier, A Höcker, F Le Diberder, V Lepeltier, A M Lutz, A Oyanguren, T C Petersen, M Pierini, S Plaszczynski, S Rodier, P Roudeau, M H Schune, A Stocchi, G Wormser, C H Cheng, D J Lange, M C Simani, D M Wright, A J Bevan, C A Chavez, I J Forster, J R Fry, E Gabathuler, R Gamet, K A George, D E Hutchcroft, R J Parry, D J Payne, K C Schofield, C Touramanis, C M Cormack, F Di Lodovico, W Menges, R Sacco, C L Brown, G Cowan, H U Flaecher, M G Green, D A Hopkins, P S Jackson, T R McMahon, S Ricciardi, F Salvatore, D Brown, C L Davis, J Allison, N R Barlow, R J Barlow, C L Edgar, M C Hodgkinson, M P Kelly, G D Lafferty, M T Naisbit, J C Williams, C Chen, W D Hulsbergen, A Jawahery, D Kovalskyi, C K Lae, D A Roberts, G Simi, G Blaylock, C Dallapiccola, S S Hertzbach, R Kofler, V B Koptchev, X Li, T B Moore, S Saremi, H Staengle, S Willocq, R Cowan, K Koeneke, G Sciolla, S J Sekula, M Spitznagel, F Taylor, R K Yamamoto, H Kim, P M Patel, S H Robertson, A Lazzaro, V Lombardo, F Palombo, J M Bauer, L Cremaldi, V Eschenburg, R Godang, R Kroeger, J Reidy, D A Sanders, D J Summers, H W Zhao, S Brunet, D Côté, P Taras, B Viaud, H Nicholson, N Cavallo, G De Nardo, F Fabozzi, C Gatto, L Lista, D Monorchio, P Paolucci, D Piccolo, C Sciacca, M Baak, H Bulten, G Raven, H L Snoek, L Wilden, C P Jessop, J M LoSecco, T Allmendinger, G Benelli, K K Gan, K Honscheid, D Hufnagel, P D Jackson, H Kagan, R Kass, T Pulliam, A M Rahimi, R Ter-Antonyan, Q K Wong, J Brau, R Frey, O Igonkina, M Lu, C T Potter, N B Sinev, D Strom, J Strube, E Torrence, F Galeazzi, M Margoni, M Morandin, M Posocco, M Rotondo, F Simonetto, R Stroili, C Voci, M Benayoun, H Briand, J Chauveau, P David, L Del Buono, Ch de la Vaissière, O Hamon, M J J John, Ph Leruste, J Malclès, J Ocariz, L Roos, G Therin, P K Behera, L Gladney, Q H Guo, J Panetta, M Biasini, R Covarelli, S Pacetti, M Pioppi, C Angelini, G Batignani, S Bettarini, F Bucci, G Calderini, M Carpinelli, R Cenci, F Forti, M A Giorgi, A Lusiani, G Marchiori, M Morganti, N Neri, E Paoloni, M Rama, G Rizzo, J Walsh, M Haire, D Judd, D E Wagoner, J Biesiada, N Danielson, P Elmer, Y P Lau, C Lu, J Olsen, A J S Smith, A V Telnov, F Bellini, G Cavoto, A D'Orazio, E Di Marco, R Faccini, F Ferrarotto, F Ferroni, M Gaspero, L Li Gioi, M A Mazzoni, S Morganti, G Piredda, F Polci, F Safai Tehrani, C Voena, H Schröder, G Wagner, R Waldi, T Adye, N De Groot, B Franek, G P Gopal, E O Olaiya, F F Wilson, R Aleksan, S Emery, A Gaidot, S F Ganzhur, P-F Giraud, G Graziani, G Hamel de Monchenault, W Kozanecki, M Legendre, G W London, B Mayer, G Vasseur, Ch Yèche, M Zito, M V Purohit, A W Weidemann, J R Wilson, F X Yumiceva, T Abe, M T Allen, D Aston, N van Bakel, R Bartoldus, N Berger, A M Boyarski, O L Buchmueller, R Claus, J P Coleman, M R Convery, M Cristinziani, J C Dingfelder, D Dong, J Dorfan, D Dujmic, W Dunwoodie, S Fan, R C Field, T Glanzman, S J Gowdy, T Hadig, V Halyo, C Hast, T Hryn'ova, W R Innes, M H Kelsey, P Kim, M L Kocian, D W G S Leith, J Libby, S Luitz, V Luth, H L Lynch, H Marsiske, R Messner, D R Muller, C P O'Grady, V E Ozcan, A Perazzo, M Perl, B N Ratcliff, A Roodman, A A Salnikov, R H Schindler, J Schwiening, A Snyder, J Stelzer, D Su, M K Sullivan, K Suzuki, S Swain, J M Thompson, J Va'vra, M Weaver, W J Wisniewski, M Wittgen, D H Wright, A K Yarritu, K Yi, C C Young, P R Burchat, A J Edwards, S A Majewski, B A Petersen, C Roat, M Ahmed, S Ahmed, M S Alam, J A Ernst, M A Saeed, F R Wappler, S B Zain, W Bugg, M Krishnamurthy, S M Spanier, R Eckmann, J L Ritchie, A Satpathy, R F Schwitters, J M Izen, I Kitayama, X C Lou, G Williams, S Ye, F Bianchi, M Bona, F Gallo, D Gamba, M Bomben, L Bosisio, C Cartaro, F Cossutti, G Della Ricca, S Dittongo, S Grancagnolo, L Lanceri, L Vitale, F Martinez-Vidal, R S Panvini, Sw Banerjee, B Bhuyan, C M Brown, D Fortin, K Hamano, R Kowalewski, J M Roney, R J Sobie, J J Back, P F Harrison, T E Latham, G B Mohanty, H R Band, X Chen, B Cheng, S Dasu, M Datta, A M Eichenbaum, K T Flood, M Graham, J J Hollar, J R Johnson, P E Kutter, H Li, R Liu, B Mellado, A Mihalyi, Y Pan, R Prepost, P Tan, J H von Wimmersperg-Toeller, S L Wu, Z Yu, H Neal; BABAR Collaboration

Affiliation

¹ Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France.

PMID: 16241645
DOI: 10.1103/PhysRevLett.95.142001

Abstract

We study initial-state radiation events, e+ e- --> gammaISR pi+ pi- J/psi, with data collected with the BABAR detector. We observe an accumulation of events near 4.26 GeV/c2 in the invariant-mass spectrum of pi+ pi- J/psi. Fits to the mass spectrum indicate that a broad resonance with a mass of about 4.26 GeV/c2 is required to describe the observed structure. The presence of additional narrow resonances cannot be excluded. The fitted width of the broad resonance is 50 to 90 MeV/c2, depending on the fit hypothesis.