[Deeppwg] [EXTERNAL] SIDIS Di-hadron abstract for CPHI-2020 Workshop

[Marco Contalbrigo]

Dear all,
below is an abstract about dihadron SIDIS analysis
Timothy intends to submit to the CPHI-2020 Workshop.
The abstract closely resembles the DNP ones, as it
is based on the same data and results.
If you have suggestions, they are welcome.
Best regards, Marco.


Dihadron beam-spin asymmetries at CLAS12

Azimuthal correlations in the production of hadron pairs in semi-inclusive deep-inelastic scattering provide rich information on nucleon structure. The additional degree of freedom
present in the two hadron final state allows for studies of correlations in the hadronization process, which can access novel fragmentation functions not accessible in single hadron
production. Consequently, several PDFs such as the higher-twist collinear PDF 𝑒(𝑥) or the as yet unmeasured dihadron fragmentation function 𝐺⊥1 can be extracted. We present preliminary
charged pion beam-spin asymmetries from a subset of the data taken in 2018 with the CLAS12 detector at Jefferson Lab. The data were taken with a 10.6 GeV polarized electron beam and an
unpolarized liquid-hydrogen target. The large kinematic acceptance and sample size allows for a multidimensional analysis in Bjorken 𝑥, 𝑧 and the invariant mass of the hadron pair.