TY  - JOUR
AU  - Kamenik, J. F.
AU  - Kosnik, N.
AU  - Novoa-Brunet, M.
PY  - 2024
DA  - 2024//
TI  - CP-odd window into long distance dynamics in rare semileptonic B decays
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 054013
EP  - 8pp
VL  - 110
IS  - 5
PB  - Amer Physical Soc
AB  - We consider the combined measurements of -averaged decay rates and direct asymmetries of (+/-) -> (+/-)l(+)l(-) and (+/-) -> (+/-)l(+)l(-) to probe (nonlocal) four-quark operator matrix element contributions to rare semileptonic meson decays. We also explore how their effects could be in principle disentangled from possible local new physics effects using -spin relations. To this end, we construct a ratio of -odd decay rate differences which are exactly predicted within the standard model in the -spin limit, while the leading -spin breaking effects can also be systematically calculated. Our results motivate binned measurements of the direct asymmetry in (+/-) -> (+/-)l(+)l(-) as well as dedicated theoretical estimates of -spin breaking both in local form factors as well as in four-quark matrix elements.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2403.13056
UR  - https://doi.org/10.1103/PhysRevD.110.054013
DO  - 10.1103/PhysRevD.110.054013
LA  - English
N1  - WOS:001317458200008
ID  - Kamenik_etal2024
ER  -