Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reading the footprints of the B-meson flavor anomalies   Motivated by the recent LHCb announcement of a $3.1\sigma$ violation of
lepton-flavor universality in the ratio $R_K=\Gamma(B\to
K\mu^+\mu^-)/\Gamma(B\to K e^+ e^-)$, we present an updated, comprehensive
analysis of the flavor anomalies seen in both neutral-current ($b\to
s\ell^+\ell^-$) and charged-current ($b\to c\tau\bar\nu$) decays of $B$ mesons.
Our study starts from a model-independent effective field-theory approach and
then considers both a simplified model and a UV-complete extension of the
Standard Model featuring a vector leptoquark $U_1$ as the main mediator of the
anomalies. We show that the new LHCb data corroborate the emerging pattern of a
new, predominantly left-handed, semileptonic current-current interaction with a
flavor structure respecting a (minimally) broken $U(2)^5$ flavor symmetry. New
aspects of our analysis include a combined analysis of the semileptonic
operators involving tau leptons, including in particular the important
constraint from $B_s$--$\bar B_s$ mixing, a systematic study of the effects of
right-handed leptoquark couplings and of deviations from minimal
flavor-symmetry breaking, a detailed analysis of various rare $B$-decay modes
which would provide smoking-gun signatures of this non-standard framework (LFV
decays, di-tau modes, and $B\to K^{(*)}\nu\bar\nu$), and finally an updated
analysis of collider bounds on the leptoquark mass and couplings.

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The categories of this paper are: math
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th