%0 Journal Article
%T CP-odd window into long distance dynamics in rare semileptonic B decays
%A Kamenik, J. F.
%A Kosnik, N.
%A Novoa-Brunet, M.
%J Physical Review D
%D 2024
%V 110
%N 5
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Kamenik_etal2024
%O WOS:001317458200008
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6263), last updated on Tue, 01 Oct 2024 07:09:49 +0000
%X 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.
%R 10.1103/PhysRevD.110.054013
%U https://arxiv.org/abs/2403.13056
%U https://doi.org/10.1103/PhysRevD.110.054013
%P 054013-8pp