Jul 5 – 12, 2017
Venice, Italy
Europe/Zurich timezone
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Nonperturbative determination of form factors for semileptonic Bs meson decays

Jul 6, 2017, 6:30 PM
Room Mosaici-2 (Palazzo del Casinò)

Room Mosaici-2

Palazzo del Casinò

Parallel Talk Flavour Physics and Fundamental Symmetries Flavour and symmetries


Oliver Witzel (University of Edinburgh)


Investigating the phenomenology of semileptonic $B_s$ meson decays allows to further constrain the Standard Model and explore new, independent channels to determine important parameters, like the CKM matrix elements $|V_{ub}|$ and $|V_{cb}|$. Given different systematics of $B_s$ decays w.r.t. $B$ decays, this may help to shed light on the long-standing discrepancy between inclusive and exclusive determinations of CKM matrix elements, on recently reported anomalies like in ratios of branching fractions, or on rare, GIM suppressed decays.

Here we report on our lattice calculation based on the set of 2+1 flavor domain-wall Iwasaki gauge field configurations generated by the RBC-UKQCD collaboration using domain-wall light, strange, and charm quarks, and bottom quarks simulated with the relativistic heavy quark action. We present new results for semileptonic form factors for $B_s \to D_s \ell \nu$ and $B_s \to K \ell \nu$ as well as for $B_s \to \phi \ell^+ \ell^-$ and will give an outlook on determining the ratios $R(D_s)$ and $R(D_s^*)$ as well as on form factors for $B_s\to K^{(*)} \ell^+ \ell^-$ decays.

Primary author

Oliver Witzel (University of Edinburgh)

Presentation materials