Observation of the decay Bc+ -> Bs0 pi+
High Energy Physics - Experiment
2013-11-11 v2
Abstract
The result of a search for the decay Bc+ -> Bs0 pi+ is presented, using the Bs0 -> Ds- pi+ and Bs0 -> J/psi Phi channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb-1 taken at a center-of-mass energy of 7 TeV, and 2 fb-1 taken at 8 TeV. The decay Bc+ -> Bs0 pi+ is observed with significance in excess of five standard deviations independently in both decay channels. The measured product of the ratio of cross-sections and branching fraction is sigma(Bc+)/sigma(Bs0) x BR(Bc+ -> Bs0 pi+) = (2.37 \pm 0.31 (stat) \pm 0.11 (syst)^{+0.17}_{-0.13} (tau_Bc)) x 10^-3 in the pseudorapidity range 2 < eta(B) < 5, where the first uncertainty is statistical, the second is systematic and the third is due to the uncertainty on the Bc lifetime. This is the first observation of a B meson decaying to another B meson via the weak interaction.
Cite
@article{arxiv.1308.4544,
title = {Observation of the decay Bc+ -> Bs0 pi+},
author = {LHCb collaboration and R. Aaij and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and P. Alvarez Cartelle and A. A. Alves and S. Amato and S. Amerio and Y. Amhis and L. Anderlini and J. Anderson and R. Andreassen and J. E. Andrews and R. B. Appleby and O. Aquines Gutierrez and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and J. J. Back and C. Baesso and V. Balagura and W. Baldini and R. J. Barlow and C. Barschel and S. Barsuk and W. Barter and Th. Bauer and A. Bay and J. Beddow and F. Bedeschi and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and R. Bernet and M. -O. Bettler and M. van Beuzekom and A. Bien and S. Bifani and T. Bird and A. Bizzeti and P. M. Bjørnstad and T. Blake and F. Blanc and J. Blouw and S. Blusk and V. 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Salustino Guimaraes and B. Sanmartin Sedes and R. Santacesaria and C. Santamarina Rios and E. Santovetti and M. Sapunov and A. Sarti and C. Satriano and A. Satta and M. Savrie and D. Savrina and M. Schiller and H. Schindler and M. Schlupp and M. Schmelling and B. Schmidt and O. Schneider and A. Schopper and M. -H. Schune and R. Schwemmer and B. Sciascia and A. Sciubba and M. Seco and A. Semennikov and K. Senderowska and I. Sepp and N. Serra and J. Serrano and P. Seyfert and M. Shapkin and I. Shapoval and P. Shatalov and Y. Shcheglov and T. Shears and L. Shekhtman and O. Shevchenko and V. Shevchenko and A. Shires and R. Silva Coutinho and M. Sirendi and N. Skidmore and T. Skwarnicki and N. A. Smith and E. Smith and E. Smith and J. Smith and M. Smith and M. D. Sokoloff and F. J. P. Soler and F. Soomro and D. Souza and B. Souza De Paula and B. Spaan and A. Sparkes and P. Spradlin and F. Stagni and S. Stahl and O. Steinkamp and S. Stevenson and S. Stoica and S. Stone and B. Storaci and M. 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Wang and D. R. Ward and N. K. Watson and A. D. Webber and D. Websdale and M. Whitehead and J. Wicht and J. Wiechczynski and D. Wiedner and L. Wiggers and G. Wilkinson and M. P. Williams and M. Williams and F. F. Wilson and J. Wimberley and J. Wishahi and W. Wislicki and M. Witek and S. A. Wotton and S. Wright and S. Wu and K. Wyllie and Y. Xie and Z. Xing and Z. Yang and X. Yuan and O. Yushchenko and M. Zangoli and M. Zavertyaev and F. Zhang and L. Zhang and W. C. Zhang and Y. Zhang and A. Zhelezov and A. Zhokhov and L. Zhong and A. Zvyagin},
journal= {arXiv preprint arXiv:1308.4544},
year = {2013}
}
Comments
Submitted to Phys. Rev. Lett