Measurement of the charge asymmetry for the KS → πeν decay and test of CPT symmetry with the KLOE detector

Journal of High Energy Physics

P. A. Lukin¹  E. P. Solodov¹  E. A. Kozyrev¹  V. L. Ivanov¹  A. Kupsć²  M. Wolke²  T. Johansson²  B. Cao²  M. Schioppa³  G. D’Agostini⁴  A. Di Domenico⁴  P. Gauzzi⁴  G. Mandaglio⁵  A. Anastasi⁶  G. Fantini⁷  G. Venanzoni⁸  N. Raha⁹  A. Fantini⁹  D. Moricciani⁹  R. Messi⁹  V. De Leo⁹  A. Passeri^1,10  A. Selce^1,10  L. Tortora^1,10  F. Ceradini^1,10  A. Budano^1,10  E. Graziani^1,10  A. Di Cicco^1,10  S. Loffredo^1,10  P. Branchini^1,10  S. Fiore^1,11  V. Patera^1,11  P. Moskal^1,12  A. Gajos^1,12  E. Czerwinski^1,12  M. Silarski^1,12  D. Kisielewska-Kaminska^1,12  F. Curciarello^1,13  E. De Lucia^1,13  F. Sirghi^1,13  A. D’Uffizi^1,13  E. Danè^1,13  D. Domenici^1,13  D. Babusci^1,13  E. Perez del Rio^1,13  P. Fermani^1,13  S. Giovannella^1,13  P. De Simone^1,13  S. Miscetti^1,13  F. Bossi^1,13  C. Bloise^1,13  A. De Santis^1,13  X. Kang^1,13  G. Capon^1,13  P. Ciambrone^1,13  M. Martini^1,13  P. Santangelo^1,13  M. Berlowski^1,13  W. Wislicki^1,14  W. Krzemien^1,14 

[1] Budker Institute of Nuclear Physics;Department of Physics and Astronomy, Uppsala University;Dipartimento di Fisica dell’Università della Calabria;Dipartimento di Fisica dell’Università “Sapienza”;Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali dell’Università di Messina;Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra dell’Università di Messina;Gran Sasso Science Institute;INFN Sezione di Pisa;INFN Sezione di Roma Tor Vergata;INFN Sezione di Roma Tre;INFN Sezione di Roma;Institute of Physics, Jagiellonian University;Laboratori Nazionali di Frascati dell’INFN;National Centre for Nuclear Research;

关键词: CP violation;    e+-e- Experiments;    Flavor physics;   

DOI  :  10.1007/JHEP09(2018)021

来源: DOAJ

【 摘 要 】

Abstract Using 1.63 fb−1 of integrated luminosity collected by the KLOE experiment about 7 × 104 K S → π ± e ∓ ν decays have been reconstructed. The measured value of the charge asymmetry for this decay is A S = (−4.9 ± 5.7stat ± 2.6syst) × 10−3, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives A S = (−3.8 ± 5.0stat ± 2.6syst) × 10−3 and, together with the asymmetry of the K L semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance.

【 授权许可】

Unknown