Study of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>decay and measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:mi>X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>3872</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>branching fraction
B. AubertLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceR. BarateLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceD. BoutignyLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceF. CoudercLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceJ.-M. GaillardLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceA. HicheurLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceY. KaryotakisLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceJ. P. LeesLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceV. TisserandLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceA. ZghicheLaboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, FranceA. PalanoUniversità di Bari, Dipartimento di Fisica and INFN, I-70126 Bari, ItalyA. PompiliUniversità di Bari, Dipartimento di Fisica and INFN, I-70126 Bari, ItalyJ. C. ChenInstitute of High Energy Physics, Beijing 100039, ChinaN. D. QiInstitute of High Energy Physics, Beijing 100039, ChinaG. RongInstitute of High Energy Physics, Beijing 100039, ChinaP. WangInstitute of High Energy Physics, Beijing 100039, ChinaY. S. ZhuInstitute of High Energy Physics, Beijing 100039, ChinaG. EigenUniversity of Bergen, Inst. of Physics, N-5007 Bergen, NorwayI. OfteUniversity of Bergen, Inst. of Physics, N-5007 Bergen, NorwayB. StuguUniversity of Bergen, Inst. of Physics, N-5007 Bergen, NorwayG. S. AbramsLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAA. W. BorglandLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAA. B. BreonLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAD. N. BrownLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAJ. Button‐ShaferLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAR. N. CahnLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAE. CharlesLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAC. T. DayLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAM. S. GillLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAA. V. GritsanLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAY. GroysmanLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAR. G. JacobsenLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAR. W. KadelLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAJ. A. KadykLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAL. T. KerthLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAYu. G. KolomenskyLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAG. KukartsevLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAC. LeClercLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAG. LynchLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAA. M. MerchantLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAL. M. MirLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAP.J. OddoneLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAT. OrimotoLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAM. PripsteinLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAN. A. RoeLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAM. T. RonanLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAV. ShelkovLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAW.A. WenzelLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAK. E. FordUniversity of Birmingham, Birmingham, B15 2TT, United KingdomT. J. HarrisonUniversity of Birmingham, Birmingham, B15 2TT, United KingdomC. M. HawkesUniversity of Birmingham, Birmingham, B15 2TT, United KingdomS. E. MorganUniversity of Birmingham, Birmingham, B15 2TT, United KingdomA. T. WatsonUniversity of Birmingham, Birmingham, B15 2TT, United KingdomM. FritschRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyK. GoetzenRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyT. HeldRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyH. KochRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyB. LewandowskiRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyM. PelizaeusRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyM. SteinkeRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyJ. BoydUniversity of Bristol, Bristol BS8 1TL, United KingdomN. ChevalierUniversity of Bristol, Bristol BS8 1TL, United KingdomW. N. CottinghamUniversity of Bristol, Bristol BS8 1TL, United KingdomM. KellyUniversity of Bristol, Bristol BS8 1TL, United KingdomT. LathamUniversity of Bristol, Bristol BS8 1TL, United KingdomF. F. WilsonUniversity of Bristol, Bristol BS8 1TL, United KingdomT. Çuhadar-DönszelmannUniversity of British Columbia, Vancouver, BC, Canada V6T 1Z1C. HeartyUniversity of British Columbia, Vancouver, BC, Canada V6T 1Z1N. S. KnechtUniversity of British Columbia, Vancouver, BC, Canada V6T 1Z1T. S. MattisonUniversity of British Columbia, Vancouver, BC, Canada V6T 1Z1J. A. McKennaUniversity of British Columbia, Vancouver, BC, Canada V6T 1Z1D. ThiessenUniversity of British Columbia, Vancouver, BC, Canada V6T 1Z1A. KhanBrunel University, Uxbridge, Middlesex UB8 3PH, United KingdomP. KyberdBrunel University, Uxbridge, Middlesex UB8 3PH, United KingdomL. TeodorescuBrunel University, Uxbridge, Middlesex UB8 3PH, United KingdomV. E. BlinovBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaA. D. BukinBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaV. P. DruzhininBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaV. B. GolubevBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaV. IvanchenkoBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaE. A. KravchenkoBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaA. P. OnuchinBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaS. I. SerednyakovBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaYu. I. SkovpenBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaE. P. SolodovBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaA. N. YushkovBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaDavid BestUniversity of California at Irvine, Irvine, California 92697, USAM. BruinsmaUniversity of California at Irvine, Irvine, California 92697, USAM. ChaoUniversity of California at Irvine, Irvine, California 92697, USAI. EschrichUniversity of California at Irvine, Irvine, California 92697, USAD. KirkbyUniversity of California at Irvine, Irvine, California 92697, USAA. J. LankfordUniversity of California at Irvine, Irvine, California 92697, USAM. MandelkernUniversity of California at Irvine, Irvine, California 92697, USAR. K. MommsenUniversity of California at Irvine, Irvine, California 92697, USAW. RoethelUniversity of California at Irvine, Irvine, California 92697, USAD. P. StokerUniversity of California at Irvine, Irvine, California 92697, USAC. BuchananUniversity of California at Los Angeles, Los Angeles, California 90024, USAB. L. HartfielUniversity of California at Los Angeles, Los Angeles, California 90024, USAJ. W. GaryUniversity of California at Riverside, Riverside, California 92521, USAB. C. ShenUniversity of California at Riverside, Riverside, California 92521, USA
2005lv
ABI
Аннотация
We study the decay B- --> J/psi K- pi+ pi- using 117 million BBbar events collected at the Y(4S) resonance with the BaBar detector at the PEP-II e+ e- asymmetric-energy storage ring. We measure the branching fractions Br(B- --> J/psi K- pi+ pi-) = (116 +- 7 (stat.) +- 9(syst.))* 10-5 and Br(B- --> X(3872)K-)* Br (X(3872) --> J/psi pi+ pi-) =(1.28+- 0.41)* 10-5 and find the mass of the X(3872) to be 3873.4 +- 1.4 MeV/c2. We search for the h_c narrow state in the decay B- --> h_c K-, h_c --> J/psi pi+ pi- and for the decay B- --> J/psi D0 pi-, with D0 --> K- pi+. We set the 90% C.L. limits Br(B- --> h_c K-)* Br (h_c --> J/psi pi+ pi-) <3.4 * 10-6 and Br(B- --> J/psi D0 pi-) <5.2 * 10-5.
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