Measurement of CP asymmetries in D± → ηπ± and Ds ±→ηπ± decays

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Authors

  • R. Aaij
  • B. Adeva
  • M. Adinolfi
  • Z. Ajaltouni
  • S. Akar
  • J. Albrecht
  • F. Alessio
  • M. Alexander
  • 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
  • W. Baldini
  • Simone Bifani
  • G. Chatzikonstantinidis
  • N. Farley
  • P. Griffith
  • Ian Kenyon
  • Cristina Lazzeroni
  • A. Mazurov
  • J. McCarthy
  • L. Pescatore
  • 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
  • CNRS/IN2P3
  • Technische Universität Dortmund
  • University of Glasgow
  • Nikhef National Institute for Subatomic Physics
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • University of Cincinnati
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • Department of Physics and Astronomy and INFN
  • IN2P3
  • University of Maryland, College Park, Maryland 20742 USA
  • University of Manchester
  • Ruprecht-Karls-Universität Heidelberg
  • Institute for High Energy Physics (IHEP)
  • Syracuse University, Syracuse, New York 13244, USA
  • THE UNIVERSITY OF WARWICK
  • Universitat Autònoma de Barcelona
  • Pontifícia Universidade Católica Do Rio de Janeiro (PUC-Rio)

Abstract

A search for CP violation in D±→ηπ± and Ds ±→ηπ± decays is performed using proton–proton collision data, corresponding to an integrated luminosity of 3 fb−1, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The measured CP-violating charge asymmetries are ACP(D±→ηπ±)=(−0.61±0.72±0.53±0.12)% and ACP(Ds ±→ηπ±)=(−0.82±0.36±0.22±0.27)%, where the first uncertainties are statistical, the second systematic, and the third are the uncertainties on the ACP(D±→KS 0π±) and ACP(Ds ±→ϕπ±) measurements used for calibration. The results represent the most precise measurements of these asymmetries to date.

Details

Original languageEnglish
Pages (from-to)21-30
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume771
Early online date12 May 2017
Publication statusPublished - 10 Aug 2017

ASJC Scopus subject areas