Observation of B0→pΛ¯D(*)-

Chang, Y. -Y.; Wang, M. -Z.; Abdesselam, A.; Adachi, I.; Adamczyk, K.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aushev, T.; Babu, V.; Badhrees, I.; Bakich, A. M.; Barberio, E.; Bhuyan, B.; Biswal, J.; Bobrov, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Chobanova, V.; Choi, S. -K.; Choi, Y.; Cinabro, D.; Dalseno, J.; Danilov, M.; Dingfelder, J.; Doležal, Z.; Drásal, Z.; Dutta, D.; Eidelman, S.; Farhat, H.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Ganguly, S.; Garmash, A.; Gillard, R.; Glattauer, R.; Goh, Y. M.; Goldenzweig, P.; Greenwald, D.; Grzymkowska, O.; Haba, J.; Hayasaka, K.; Hayashii, H.; He, X. H.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Jacobs, W. W.; Jaegle, I.; Joffe, D.; Joo, K. K.; Kawasaki, T.; Kim, D. Y.; Kim, H. J.; Kim, J. B.; Kim, J. H.; Kim, K. T.; Kim, M. J.; Kim, S. H.; Kim, Y. J.; Kinoshita, K.; Korpar, S.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumita, T.; Kuzmin, A.; Kwon, Y. -J.; Lai, Y. -T.; Lee, I. S.; Li, L.; Li, Y.; Libby, J.; Liventsev, D.; Lukin, P.; Masuda, M.; Matvienko, D.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mohanty, S.; Moll, A.; Moon, H. K.; Mori, T.; Nakano, E.; Nakao, M.; Nanut, T.; Nayak, M.; Nishida, S.; Ogawa, S.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Park, C. W.; Pedlar, T. K.; Pestotnik, R.; Petrič, M.; Piilonen, L. E.; Rauch, J.; Ribežl, E.; Ritter, M.; Rostomyan, A.; Ryu, S.; Sahoo, H.; Sakai, Y.; Sandilya, S.; Santelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Seong, I. S.; Sevior, M. E.; Shebalin, V.; Shen, C. P.; Shibata, T. -A.; Shiu, J. -G.; Simon, F.; Sohn, Y. -S.; Starič, M.; Stypula, J.; Sumihama, M.; Sumisawa, K.; Sumiyoshi, T.; Tamponi, U.; Tanida, K.; Teramoto, Y.; Uglov, T.; Unno, Y.; Uno, S.; Usov, Y.; Van Hulse, C.; Vanhoefer, P.; Varner, G.; Vorobyev, V.; Vossen, A.; Wagner, M. N.; Wang, C. H.; Wang, P.; Watanabe, M.; Watanabe, Y.; Williams, K. M.; Won, E.; Yamaoka, J.; Yashchenko, S.; Yelton, J.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

doi:10.1103/PhysRevLett.115.221803

Title: Observation of $B^{0} \to p \bar{Λ} D^{(*) -}$

Journal Article · Tue Nov 24 00:00:00 EST 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.221803· OSTI ID:1594406

Chang, Y. -Y.; Wang, M. -Z.; Abdesselam, A.; Adachi, I.; Adamczyk, K.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aushev, T.; Babu, V.; Badhrees, I.; Bakich, A. M.; Barberio, E.; Bhuyan, B.; Biswal, J.; Bobrov, A.; Bozek, A.; Bračko, M.; Browder, T. E. more »

We report the first observation of the decays B⁰→p$$\bar{Λ}$$D(*)-. The data sample of 711 fb^-1 used in this analysis corresponds to 772 million $$B$$$\bar{B}$$ pairs, collected at the Υ(4S) resonance by the Belle detector at the KEKB asymmetric-energy e⁺e^- collider. We observe 19.8σ and 10.8σ excesses of events for the two decay modes and measure the branching fractions of B⁰→p$$\bar{Λ}$$D- and B⁰→p$$\bar{Λ}$$D(*)- to be (25.1±2.6±3.5)×10^-6 and (33.6±6.3±4.4)×10^-6, respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the di-baryon (p$$\bar{Λ}$$) system is observed, consistent with that observed in similar B decays.

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Research Organization:: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: Belle Collaboration

Grant/Contract Number:: SC0009973; AC05-76RL01830

OSTI ID:: 1594406

Alternate ID(s):: OSTI ID: 1227088

Report Number(s):: PNNL-SA-115105; PRLTAO; TRN: US2101614

Journal Information:: Physical Review Letters, Vol. 115, Issue 22; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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References (29)

Study of the decay mechanism for <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math> and <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math> Wei, J. -T.; Wang, M. -Z.; Adachi, I. Physics Letters B, Vol. 659, Issue 1-2 https://doi.org/10.1016/j.physletb.2007.11.063	journal	January 2008
Observation and study of the baryonic $B$ -meson decays $B \to D^{(*)} p \bar{p} (π) (π)$ del Amo Sanchez, P.; Lees, J. P.; Poireau, V. Physical Review D, Vol. 85, Issue 9 https://doi.org/10.1103/PhysRevD.85.092017	journal	May 2012
Observation of $B^{-} \to J / ψ Λ \bar{p}$ and searches for $B^{-} \to J / ψ Σ^{0} \bar{p}$ and $B^{0} \to J / ψ p \bar{p}$ decays Xie, Q. L.; Abe, K.; Abe, K. Physical Review D, Vol. 72, Issue 5 https://doi.org/10.1103/PhysRevD.72.051105	journal	September 2005
Observation of ${\bar{B}}^{0} \to D^{(*) 0} p \bar{p}$ Abe, K.; Abe, K.; Abe, R. Physical Review Letters, Vol. 89, Issue 15 https://doi.org/10.1103/PhysRevLett.89.151802	journal	September 2002
Observation of a Resonance $X (1835)$ in $J / ψ \to γ π^{+} π^{-} η^{'}$ Ablikim, M.; Bai, J. Z.; Ban, Y. Physical Review Letters, Vol. 95, Issue 26 https://doi.org/10.1103/PhysRevLett.95.262001	journal	December 2005
The EvtGen particle decay simulation package Lange, David J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 462, Issue 1-2 https://doi.org/10.1016/S0168-9002(01)00089-4	journal	April 2001
The use of Multiple Measurements in Taxonomic Problems Fisher, R. A. Annals of Eugenics, Vol. 7, Issue 2 https://doi.org/10.1111/j.1469-1809.1936.tb02137.x	journal	September 1936
Observation of inclusive B meson decays into Λc+ Baryons Albrecht, H.; Böckmann, P.; Gläser, R. Physics Letters B, Vol. 210, Issue 1-2 https://doi.org/10.1016/0370-2693(88)90383-8	journal	August 1988
Review of Particle Physics Olive, K. A. Chinese Physics C, Vol. 38, Issue 9 https://doi.org/10.1088/1674-1137/38/9/090001	journal	August 2014
Measurements of the decays $B^{0} \to {\bar{D}}^{0} p \bar{p}$ , $B^{0} \to {\bar{D}}^{* 0} p \bar{p}$ , $B^{0} \to D^{-} p \bar{p} π^{+}$ , and $B^{0} \to D^{* -} p \bar{p} π^{+}$ Aubert, B.; Barate, R.; Bona, M. Physical Review D, Vol. 74, Issue 5 https://doi.org/10.1103/PhysRevD.74.051101	journal	September 2006
Observables for the Analysis of Event Shapes in $e^{+} e^{-}$ Annihilation and Other Processes Fox, Geoffrey C.; Wolfram, Stephen Physical Review Letters, Vol. 41, Issue 23 https://doi.org/10.1103/PhysRevLett.41.1581	journal	December 1978
Observation of $B^{0} \to p \bar{p} K^{* 0}$ with a Large $K^{* 0}$ Polarization Chen, J. -H.; Wang, M. -Z.; Adachi, I. Physical Review Letters, Vol. 100, Issue 25 https://doi.org/10.1103/PhysRevLett.100.251801	journal	June 2008
Physics achievements from the Belle experiment Brodzicka, J.; Browder, T.; Chang, P. Progress of Theoretical and Experimental Physics, Vol. 2012, Issue 1 https://doi.org/10.1093/ptep/pts072	journal	January 2012
Partial waves of baryon–antibaryon in three-body B meson decay Suzuki, Mahiko Journal of Physics G: Nuclear and Particle Physics, Vol. 34, Issue 2 https://doi.org/10.1088/0954-3899/34/2/009	journal	December 2006
Achievements of KEKB Abe, T.; Akai, K.; Akasaka, N. Progress of Theoretical and Experimental Physics, Vol. 2013, Issue 3 https://doi.org/10.1093/ptep/pts102	journal	January 2013
Measurement of baryon production in $B$ -meson decay Crawford, G.; Fulton, R.; Jensen, T. Physical Review D, Vol. 45, Issue 3 https://doi.org/10.1103/PhysRevD.45.752	journal	February 1992
Study of $ψ (2 S)$ decays to $γ p \bar{p}$ , $π^{0} p \bar{p}$ , and $η p \bar{p}$ , and search for $p \bar{p}$ threshold enhancements Alexander, J. P.; Cassel, D. G.; Das, S. Physical Review D, Vol. 82, Issue 9 https://doi.org/10.1103/PhysRevD.82.092002	journal	November 2010
Charmful three-body baryonic $B$ decays Chen, Chun-Hung; Cheng, Hai-Yang; Geng, C. Q. Physical Review D, Vol. 78, Issue 5 https://doi.org/10.1103/PhysRevD.78.054016	journal	September 2008
Observation of a Near-Threshold Enhancement in the $p \bar{p}$ Mass Spectrum from Radiative $J / ψ \to γ p \bar{p}$ Decays Bai, J. Z.; Ban, Y.; Bian, J. G. Physical Review Letters, Vol. 91, Issue 2 https://doi.org/10.1103/PhysRevLett.91.022001	journal	July 2003
Observation of $B^{-} \to \bar{p} Λ D^{0}$ at Belle Chen, P.; Wang, M. -Z.; Adachi, I. Physical Review D, Vol. 84, Issue 7 https://doi.org/10.1103/PhysRevD.84.071501	journal	October 2011
Belle PID Nakano, E. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 494, Issue 1-3 https://doi.org/10.1016/S0168-9002(02)01510-3	journal	November 2002
Evidence for $B^{0} \to π^{0} π^{0}$ Lee, S. H.; Suzuki, K.; Abe, K. Physical Review Letters, Vol. 91, Issue 26 https://doi.org/10.1103/PhysRevLett.91.261801	journal	December 2003
Study of $B^{+} \to p \bar{Λ} γ$ , $p \bar{Λ} π^{0}$ and $B^{0} \to p \bar{Λ} π^{-}$ Wang, M. -Z.; Lee, Y. -J.; Abe, K. Physical Review D, Vol. 76, Issue 5 https://doi.org/10.1103/PhysRevD.76.052004	journal	September 2007
Search for hadronic b→u decays Albrecht, H.; Gläser, R.; Harder, G. Physics Letters B, Vol. 241, Issue 2 https://doi.org/10.1016/0370-2693(90)91293-K	journal	May 1990
Observation of $B^{+} \to Λ_{c}^{+} Λ_{c}^{-} K^{+}$ and $B^{0} \to Λ_{c}^{+} Λ_{c}^{-} K^{0}$ Decays Gabyshev, N.; Abe, K.; Abe, K. Physical Review Letters, Vol. 97, Issue 20 https://doi.org/10.1103/PhysRevLett.97.202003	journal	November 2006
Overview of the KEKB accelerators Kurokawa, S.; Kikutani, E. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 1 https://doi.org/10.1016/S0168-9002(02)01771-0	journal	February 2003
The Belle detector Abashian, A.; Gotow, K.; Morgan, N. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 1 https://doi.org/10.1016/S0168-9002(01)02013-7	journal	February 2002
Angular distributions in three-body baryonic $B$ decays Geng, C. Q.; Hsiao, Y. K. Physical Review D, Vol. 74, Issue 9 https://doi.org/10.1103/PhysRevD.74.094023	journal	November 2006
Study of the baryon–antibaryon low-mass enhancements in charmless three-body baryonic B decays Wang, M. -Z.; Abe, K.; Abe, K. Physics Letters B, Vol. 617, Issue 3-4 https://doi.org/10.1016/j.physletb.2005.05.008	journal	June 2005

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