Aubert B, Bona M, Boutigny D, Karyotakis Y, Lees J P, Poireau V, Prudent X, Tisserand V, Zghiche A, Grauges E, Palano A, Chen J C, Qi N D, Rong G, Wang P, Zhu Y S, Eigen G, Ofte I, Stugu B, Abrams G S, Battaglia M, Brown D N, Button-Shafer J, Cahn R N, Groysman Y, Jacobsen R G, Kadyk J A, Kerth L T, Kolomensky Yu G, Kukartsev G, Pegna D Lopes, Lynch G, Mir L M, Orimoto T J, Osipenkov I, Pripstein M, Roe N A, Ronan M T, Tackmann K, Wenzel W A, Sanchez P Del Amo, Barrett M, Harrison T J, Hart A J, Hawkes C M, Watson A T, Held T, Koch H, Lewandowski B, Pelizaeus M, Peters K, Schroeder T, Steinke M, Boyd J T, Burke J P, Cottingham W N, Walker D, Asgeirsson D J, Cuhadar-Donszelmann T, Fulsom B G, Hearty C, Knecht N S, Mattison T S, McKenna J A, Khan A, Kyberd P, Saleem M, Sherwood D J, Teodorescu L, Blinov V E, Bukin A D, Druzhinin V P, Golubev V B, Onuchin A P, Serednyakov S I, Skovpen Yu I, Solodov E P, Todyshev K Yu, Bondioli M, Bruinsma M, Chao M, Curry S, Eschrich I, Kirkby D, Lankford A J, Lund P, Mandelkern M, Martin E C, Stoker D P, Abachi S, Buchanan C, Foulkes S D, Gary J W, Liu F, Long O, Shen B C, Zhang L, Hill E J, Paar H P, Rahatlou S, Sharma V, Berryhill J W, Campagnari C, Cunha A, Dahmes B, Hong T M, Kovalskyi D, Richman J D, Beck T W, Eisner A M, Flacco C J, Heusch C A, Kroseberg J, Lockman W S, Schalk T, Schumm B A, Seiden A, Williams D C, Wilson M G, Winstrom L O, Chen E, Cheng C H, Dvoretskii A, Fang F, Hitlin D G, Narsky I, Piatenko T, Porter F C, Mancinelli G, Meadows B T, Mishra K, Sokoloff M D, Blanc F, Bloom P C, Chen S, Ford W T, Hirschauer J F, Kreisel A, Nagel M, Nauenberg U, Olivas A, Smith J G, Ulmer K A, Wagner S R, Zhang J, Chen A, Eckhart E A, Soffer A, Toki W H, Wilson R J, Winklmeier F, Zeng Q, Altenburg D D, Feltresi E, Hauke A, Jasper H, Merkel J, Petzold A, Spaan B, Wacker K, Brandt T, Klose V, Lacker H M, Mader W F, Nogowski R, Schubert J, Schubert K R, Schwierz R, Sundermann J E, Volk A, Bernard D, Bonneaud G R, Latour E, Thiebaux Ch, Verderi M, Clark P J, Gradl W, Muheim F, Playfer S, Robertson A I, Xie Y, Andreotti M, Bettoni D, Bozzi C, Calabrese R, Cibinetto G, Luppi E, Negrini M, Petrella A, Piemontese L, Prencipe E, Anulli F, Baldini-Ferroli R, Calcaterra A, de Sangro R, Finocchiaro G, Pacetti S, Patteri P, Peruzzi I M, Piccolo M, Rama M, Zallo A, Buzzo A, Contri R, Vetere M Lo, Macri M M, Monge M R, Passaggio S, Patrignani C, Robutti E, Santroni A, Tosi S, Chaisanguanthum K S, Morii M, Wu J, Dubitzky R S, Marks J, Schenk S, Uwer U, Bard D J, Dauncey P D, Flack R L, Nash J A, Nikolich M B, Vazquez W Panduro, Behera P K, Chai X, Charles M J, Mallik U, Meyer N T, Ziegler V, Cochran J, Crawley H B, Dong L, Eyges V, Meyer W T, Prell S, Rosenberg E I, Rubin A E, Gritsan A V, Lae C K, Denig A G, Fritsch M, Schott G, Arnaud N, Davier M, Grosdidier G, Höcker A, Lepeltier V, Diberder F Le, Lutz A M, Pruvot S, Rodier S, Roudeau P, Schune M H, Serrano J, Sordini V, Stocchi A, Wang W F, Wormser G, Lange D J, Wright D M, Chavez C A, Forster I J, Fry J R, Gabathuler E, Gamet R, Hutchcroft D E, Payne D J, Schofield K C, Touramanis C, Bevan A J, George K A, Lodovico F Di, Menges W, Sacco R, Cowan G, Flaecher H U, Hopkins D A, Jackson P S, McMahon T R, Salvatore F, Wren A C, Brown D N, Davis C L, Allison J, Barlow N R, Barlow R J, Chia Y M, Edgar C L, Lafferty G D, West T J, Yi J I, Chen C, Hulsbergen W D, Jawahery A, Roberts D A, Simi G, Blaylock G, Dallapiccola C, Hertzbach S S, Li X, Moore T B, Salvati E, Saremi S, Cowan R, Sciolla G, Sekula S J, Spitznagel M, Taylor F, Yamamoto R K, Kim H, McLachlin S E, Patel P M, Robertson S H, Lazzaro A, Lombardo V, Palombo F, Bauer J M, Cremaldi L, Eschenburg V, Godang R, Kroeger R, Sanders D A, Summers D J, Zhao H W, Brunet S, Côté D, Simard M, Taras P, Viaud F B, Nicholson H, Cavallo N, Nardo G De, Fabozzi F, Gatto C, Lista L, Monorchio D, Paolucci P, Piccolo D, Sciacca C, Baak M A, Raven G, Snoek H L, Jessop C P, Losecco J M, Benelli G, Corwin L A, Gan K K, Honscheid K, Hufnagel D, Kagan H, Kass R, Morris J P, Rahimi A M, Regensburger J J, Ter-Antonyan R, Wong Q K, Blount N L, Brau J, Frey R, Igonkina O, Kolb J A, Lu M, Potter C T, Rahmat R, Sinev N B, Strom D, Strube J, Torrence E, Gaz A, Margoni M, Morandin M, Pompili A, Posocco M, Rotondo M, Simonetto F, Stroili R, Voci C, Ben-Haim E, Briand H, Chauveau J, David P, Buono L Del, de la Vaissière Ch, Hamon O, Hartfiel B L, Leruste Ph, Malclès J, Ocariz J, Gladney L, Biasini M, Covarelli R, Angelini C, Batignani G, Bettarini S, Calderini G, Carpinelli M, Cenci R, Forti F, Giorgi M A, Lusiani A, Marchiori G, Mazur M A, Morganti M, Neri N, Paoloni E, Rizzo G, Walsh J J, Haire M, Biesiada J, Elmer P, Lau Y P, Lu C, Olsen J, Smith A J S, Telnov A V, Bellini F, Cavoto G, D'Orazio A, Del Re D, Marco E Di, Faccini R, Ferrarotto F, Ferroni F, Gaspero M, Jackson P D, Gioi L Li, Mazzoni M A, Morganti S, Piredda G, Polci F, Voena C, Ebert M, Schröder H, Waldi R, Adye T, Castelli G, Franek B, Olaiya E O, Ricciardi S, Roethel W, Wilson F F, Aleksan R, Emery S, Escalier M, Gaidot A, Ganzhur S F, de Monchenault G Hamel, Kozanecki W, Legendre M, Vasseur G, Yèche Ch, Zito M, Chen X R, Liu H, Park W, Purohit M V, Wilson J R, Allen M T, Aston D, Bartoldus R, Bechtle P, Berger N, Claus R, Coleman J P, Convery M R, Dingfelder J C, Dorfan J, Dubois-Felsmann G P, Dujmic D, Dunwoodie W, Field R C, Glanzman T, Gowdy S J, Graham M T, Grenier P, Halyo V, Hast C, Hryn'ova T, Innes W R, Kelsey M H, Kim P, Leith D W G S, Li S, Luitz S, Luth V, Lynch H L, Macfarlane D B, Marsiske H, Messner R, Muller D R, O'grady C P, Ozcan V E, Perazzo A, Perl M, Pulliam T, Ratcliff B N, Roodman A, Salnikov A A, Schindler R H, Schwiening J, Snyder A, Stelzer J, Su D, Sullivan M K, Suzuki K, Swain S K, Thompson J M, Va'vra J, van Bakel N, Wagner A P, Weaver M, Wisniewski W J, Wittgen M, Wright D H, Wulsin H W, Yarritu A K, Yi K, Young C C, Burchat P R, Edwards A J, Majewski S A, Petersen B A, Wilden L, Ahmed S, Alam M S, Bula R, Ernst J A, Jain V, Pan B, Saeed M A, Wappler F R, Zain S B, Bugg W, Krishnamurthy M, Spanier S M, Eckmann R, Ritchie J L, Schilling C J, Schwitters R F, Izen J M, Lou X C, Ye S, Bianchi F, Gallo F, Gamba D, Pelliccioni M, Bomben M, Bosisio L, Cartaro C, Cossutti F, Ricca G Della, Lanceri L, Vitale L, Azzolini V, Lopez-March N, Martinez-Vidal F, Oyanguren A, Albert J, Banerjee Sw, Bhuyan B, Hamano K, Kowalewski R, Nugent I M, Roney J M, Sobie R J, Back J J, Harrison P F, Latham T E, Mohanty G B, Pappagallo M, Band H R, Chen X, Dasu S, Flood K T, Hollar J J, Kutter P E, Mellado B, Pan Y, Pierini M, Prepost R, Wu S L, Yu Z, Neal H
Laboratoire de Physique des Particules, IN2P3/CNRS et Université de Savoie, F-74941 Annecy-Le-Vieux, France.
Phys Rev Lett. 2007 Mar 16;98(11):111801. doi: 10.1103/PhysRevLett.98.111801. Epub 2007 Mar 13.
We search for the decays B(0) --> rho(0)rho(0), B(0) --> rho(0)f(0)(980), and B(0) --> f(0)(980)f(0)(980) in a sample of about 384 x 10(6) Upsilon(4S) --> BB[over] decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at Stanford Linear Accelerator Center. We find evidence for B(0) --> rho(0)rho(0) with 3.5 sigma significance and measure the branching fraction B = (1.07 +/- 0.33 +/- 0.19) x 10(-6) and longitudinal polarization fraction f(L) = 0.87 +/- 0.13 +/- 0.04, where the first uncertainty is statistical, and the second is systematic. The uncertainty on the Cabibbo-Kobayashi-Maskawa quark-mixing matrix unitarity angle alpha due to penguin contributions in B --> rho rho decays is 18 degrees at the 1 sigma level. We also set upper limits on the B(0) --> rho(0)f(0)(980) and B(0) --> f(0)(980)f(0)(980) decay rates.
我们在斯坦福直线加速器中心的PEP-II非对称能正负电子对撞机上，利用BABAR探测器收集的约384×10⁶个Υ(4S)→BB衰变样本中，寻找B⁰→ρ⁰ρ⁰、B⁰→ρ⁰f₀(980)以及B⁰→f₀(980)f₀(980)衰变。我们发现了B⁰→ρ⁰ρ⁰的证据，显著性为3.5σ，并测量了分支比B = (1.07±0.33±0.19)×10⁻⁶以及纵向极化分数f(L)=0.87±0.13±0.04，其中第一个不确定度是统计性的，第二个是系统性的。在B→ρρ衰变中，由于企鹅图贡献导致的卡比博-小林-益川夸克混合矩阵幺正角α的1σ水平不确定度为18度。我们还对B⁰→ρ⁰f₀(980)和B⁰→f₀(980)f₀(980)衰变率设定了上限。
