Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New method for fitting coefficients in standard model effective theory   We present an alternative method for carrying out a principal-component
analysis of Wilson coefficients in standard model effective field theory
(SMEFT). The method is based on singular-value decomposition (SVD). The SVD
method provides information about the sensitivity of experimental observables
to physics beyond the standard model that is not accessible in the
Fisher-information method. In principle, the SVD method can also have
computational advantages over diagonalization of the Fisher information matrix.
We demonstrate the SVD method by applying it to the dimension-6 coefficients
for the process of top-quark decay to a $b$ quark and a $W$ boson and use this
example to illustrate some pitfalls in widely used fitting procedures. We also
outline an iterative procedure for applying the SVD method to dimension-8 SMEFT
coefficients.

33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn