Measurement of CP observables in B± → D(⁎)K± and B± → D(⁎)π± decays

Research output: Contribution to journalArticlepeer-review

Authors

  • R. Aaij
  • B. Adeva
  • M. Adinolfi
  • Z. Ajaltouni
  • S. Akar
  • J. Albrecht
  • F. Alessio
  • M. Alexander
  • A. Alfonso Albero
  • S. Ali
  • G. Alkhazov
  • P. Alvarez Cartelle
  • A. A. Alves
  • S. Amato
  • S. Amerio
  • Y. Amhis
  • L. An
  • L. Anderlini
  • G. Andreassi
  • M. Andreotti
  • J. E. Andrews
  • R. B. Appleby
  • F. Archilli
  • P. d'Argent
  • J. Arnau Romeu
  • A. Artamonov
  • M. Artuso
  • E. Aslanides
  • G. Auriemma
  • M. Baalouch
  • I. Babuschkin
  • S. Bachmann
  • J. J. Back
  • A. Badalov
  • C. Baesso
  • S. Baker
  • V. Balagura
  • W. Baldini
  • A. Baranov
  • Simone Bifani
  • R. Calladine
  • G. Chatzikonstantinidis
  • N. Farley
  • Cristina Lazzeroni
  • A. Mazurov
  • Antonino Sergi
  • Nigel Watson
  • Matt Williams
  • T. Williams
  • K. A. Zarebski
  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • Laboratory of Photonics and Interfaces, Department de Chimie, Ecole Polytechnique Federale de Lausanne
  • European Organization for Nuclear Research (CERN)
  • Universidad de Santiago de Compostela
  • BRISTOL UNIVERSITY
  • LPC
  • University of Cincinnati
  • Technische Universität Dortmund
  • University of Glasgow
  • Universitat Autònoma de Barcelona
  • Nikhef National Institute for Subatomic Physics
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • Department of Physics and Astronomy and INFN
  • IN2P3
  • Tsinghua University
  • Department of Biology and Evolution; University of Ferrara; Ferrara; Italy
  • University of Maryland, College Park, Maryland 20742 USA
  • University of Manchester
  • Ruprecht-Karls-Universität Heidelberg
  • CNRS/IN2P3
  • Institute for High Energy Physics (IHEP)
  • Syracuse University, Syracuse, New York 13244, USA
  • THE UNIVERSITY OF WARWICK
  • Pontifícia Universidade Católica Do Rio de Janeiro (PUC-Rio)
  • Yandex School of Data Analysis

Abstract

Measurements of CP observables in B±→D(⁎)K± and B±→D(⁎)π± decays are presented, where D(⁎) indicates a neutral D or D meson that is an admixture of D(⁎)0 and D¯(⁎)0 states. Decays of the D meson to the Dπ0 and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K±π, K+K and π+π final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb−1 taken at centre-of-mass energies of s=7, 8 and 13 TeV, respectively. The study of B±→DK± and B±→Dπ± decays using a partial reconstruction method is the first of its kind, while the measurement of B±→DK± and B±→Dπ± decays is an update of previous LHCb measurements. The B±→DK± results are the most precise to date.

Details

Original languageEnglish
Pages (from-to)16-30
Number of pages15
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume777
Early online date5 Dec 2017
Publication statusPublished - 10 Feb 2018

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