Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 100 (14), 142001

Observation of a Resonancelike Structure in the Pi +- Psi' Mass Distribution in Exclusive B-->Kpi +- Psi' Decays

S-K Choi  1 S L OlsenI AdachiH AiharaV AulchenkoT AushevT AzizA M BakichV BalaguraI BednyU BitencA BondarA BozekM BrackoJ BrodzickaT E BrowderP ChangY ChaoA ChenK-F ChenW T ChenB G CheonR ChistovY ChoiJ DalsenoM DanilovM DashS EidelmanN GabyshevB GolobJ HabaT HaraK HayasakaH HayashiiM HazumiD HeffernanY HoshiW-S HouH J HyunT IijimaK InamiA IshikawaH IshinoR ItohM IwasakiY IwasakiD H KahJ H KangN KatayamaH KawaiT KawasakiH KichimiH O KimS K KimY J KimK KinoshitaP KrizanP KrokovnyR KumarC C KuoA KuzminY-J KwonJ S LangeJ S LeeM J LeeS E LeeT LesiakA LimosaniS-W LinY LiuD LiventsevF MandlA MatyjaS McOnieT MedvedevaW MitaroffK MiyabayashiH MiyakeH MiyataY MiyazakiR MizukG R MoloneyE NakanoM NakaoS NishidaO NitohT NozakiS OgawaT OhshimaS OkunoH OzakiP PakhlovG PakhlovaC W ParkH ParkL S PeakR PestotnikL E PiilonenH SahooY SakaiO SchneiderA J SchwartzK SenyoM ShapkinC P ShenH ShibuyaB ShwartzJ B SinghA SomovS StanicM StaricT SumiyoshiS Y SuzukiF TakasakiK TamaiM TanakaY TeramotoI TikhomirovS UeharaT UglovY UnnoS UnoP UrquijoG VarnerK VervinkS VillaC H WangM-Z WangP WangX L WangY WatanabeR WeddE WonB D YabsleyY YamashitaC Z YuanZ P ZhangV ZhulanovA ZupancO ZyukovaBelle Collaboration
Affiliations

Observation of a Resonancelike Structure in the Pi +- Psi' Mass Distribution in Exclusive B-->Kpi +- Psi' Decays

S-K Choi et al. Phys Rev Lett.

Abstract

A distinct peak is observed in the pi +/- psi' invariant mass distribution near 4.43 GeV in B-->K pi +/- psi' decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433+/-4(stat)+/-2(syst) MeV and Gamma=45-13+18(stat)-13+30(syst) MeV. The product branching fraction is determined to be B(B 0-->K -/+Z+/-(4430)) x B(Z+/-(4430)-->pi+/-psi')=(4.1+/-1.0(stat)+/-1.4(syst)) x 10(-5), where Z+/-(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5 sigma. These results are obtained from a 605 fb(-1) data sample that contains 657 x 10(6) BB pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider.

Similar articles

See all similar articles

Cited by 1 PubMed Central articles

Publication types

Feedback