Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Understanding and constraining the PDF uncertainties in a W boson mass
  measurement with forward muons at the LHC   Precision electroweak tests are a powerful probe of physics beyond the
Standard Model, but the sensitivity is limited by the precision with which the
$W$ boson mass ($M_W$) has been measured. The Parton Distribution Function
(PDF) uncertainties are a potential limitation for measurements of $M_W$ with
LHC data. It has recently been pointed out that, thanks to LHCb's unique
forward rapidity acceptance, a new measurement of $M_W$ by LHCb can improve
this situation. Here we report on a detailed study on the mechanism driving the
PDF uncertainty in the LHCb measurement of $M_W$, and propose an approach which
should reduce this uncertainty by roughly a factor of two using LHCb Run 2
data.

31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int