Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\Lambda_b \to \Lambda \ell^+ \ell^-$ form factors, differential
  branching fraction, and angular observables from lattice QCD with
  relativistic $b$ quarks   Using $(2+1)$-flavor lattice QCD, we compute the 10 form factors describing
the $\Lambda_b \to \Lambda$ matrix elements of the $b \to s$ vector, axial
vector, and tensor currents. The calculation is based on gauge field ensembles
generated by the RBC and UKQCD Collaborations with a domain-wall action for the
$u$, $d$, and $s$ quarks and the Iwasaki gauge action. The $b$ quark is
implemented using an anisotropic clover action, tuned nonperturbatively to the
physical point, and the currents are renormalized with a mostly nonperturbative
method. We perform simultaneous chiral, continuum, and kinematic extrapolations
of the form factors through modified $z$ expansions. Using our form factor
results, we obtain precise predictions for the $\Lambda_b \to \Lambda(\to p^+
\pi^-) \mu^+ \mu^-$ differential branching fraction and angular observables in
the Standard Model.

27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th