TY - JOUR
T1 - Subtleties in the B a B ar measurement of time-reversal violation
AU - Applebaum, Elaad
AU - Efrati, Aielet
AU - Grossman, Yuval
AU - Nir, Yosef
AU - Soreq, Yotam
N1 - Simons Foundation [267432]; U.S. National Science Foundation [PHY-0757868]; United States-Israel Binational Science Foundation (BSF) [2010221]; Israel Science Foundation [1937/12]; I-CORE program of the Planning and Budgeting Committee; German-Israeli foundation for scientific research and development (GIF)We thank Jose Bernabeu, Klaus Schubert and Abner Soffer for useful correspondence. E. A. thanks the Kupcinet-Getz Program for their hospitality at the Weizmann Institute. Y. G. is a Weston Visiting Professor at the Weizmann Institute. This work was partially supported by a grant from the Simons Foundation (#267432 to Y. G.). The work of Y. G. is supported in part by the U.S. National Science Foundation through Grant No. PHY-0757868 and by the United States-Israel Binational Science Foundation (BSF) under Grant No. 2010221. Y. N. is the Amos de-Shalit chair of theoretical physics. Y. N. is supported by the Israel Science Foundation, by the I-CORE program of the Planning and Budgeting Committee and the Israel Science Foundation (Grant No. 1937/12), and by the German-Israeli foundation for scientific research and development (GIF).
PY - 2014/4/30
Y1 - 2014/4/30
N2 - A first measurement of time-reversal (T) asymmetries that are not also CP asymmetries has been recently achieved by the BaBar collaboration. We analyze the measured asymmetries in the presence of direct CP violation, CPTviolation, wrong strangeness decays and wrong sign semileptonic decays. We note that the commonly used SψK and CψK parameters are CP-odd, but have a T-odd CPT-even part and a T-even CPT-odd part. We introduce parameters that have well-defined transformation properties under CP, T and CPT. We identify contributions to the measured asymmetries that are T conserving. We explain why, in order that the measured asymmetries would be purely odd under time-reversal, there is no need to assume the absence of direct CP violation. Instead, one needs to assume (i) the absence of CPT violation in strangeness changing decays, and (ii) the absence of wrong sign decays.
AB - A first measurement of time-reversal (T) asymmetries that are not also CP asymmetries has been recently achieved by the BaBar collaboration. We analyze the measured asymmetries in the presence of direct CP violation, CPTviolation, wrong strangeness decays and wrong sign semileptonic decays. We note that the commonly used SψK and CψK parameters are CP-odd, but have a T-odd CPT-even part and a T-even CPT-odd part. We introduce parameters that have well-defined transformation properties under CP, T and CPT. We identify contributions to the measured asymmetries that are T conserving. We explain why, in order that the measured asymmetries would be purely odd under time-reversal, there is no need to assume the absence of direct CP violation. Instead, one needs to assume (i) the absence of CPT violation in strangeness changing decays, and (ii) the absence of wrong sign decays.
UR - http://www.scopus.com/inward/record.url?scp=84899715258&partnerID=8YFLogxK
U2 - https://doi.org/10.1103/PhysRevD.89.076011
DO - https://doi.org/10.1103/PhysRevD.89.076011
M3 - مقالة
SN - 1550-7998
VL - 89
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 7
M1 - 076011
ER -