Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on a New Light Spin-One Particle from Rare b -> s
  Transitions   The anomalously large like-sign dimuon charge asymmetry in semileptonic
b-hadron decays recently measured by the D0 Collaboration may be hinting at the
presence of CP-violating new physics in the mixing of B_s mesons. It has been
suggested that the effect of a nonstandard spin-1 particle lighter than the b
quark with flavor-changing couplings to b and s quarks can reproduce the D0
result within its one-sigma range. Here we explore the possibility that the new
particle also couples to charged leptons l=e,mu and thus contributes to rare b
-> s processes involving the leptons. We consider in particular constraints on
its couplings from existing experimental data on the inclusive B -> X_s l^+ l^-
and exclusive B -> K^{(*)} l^+ l^- decays, as well as the anomalous magnetic
moments of the leptons. We find that there is parameter space of the particle
that is allowed by the current data. Future measurements of these B transitions
and rare decays of the B_s meson, such as B_s -> (phi,eta,eta') l^+ l^- and B_s
-> l^+ l^-, at LHCb and next-generation B factories can probe its presence or
couplings more stringently.

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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: chem-ph