[Clas12_deepana] Two abstract submissions for APS April meeting 2022

[Fatiha Benmokhtar]

Dear all,

 I will be submitting to abstracts: One for my student Alyssa Gadsby for
the undergraduate session and another one for myself for the
mini-symposium on the Multi-Dimensional structure of hadrons. Both are 10
min contributed talks. The due date submission is Dec 20 and the two
darft abstracts are pasted at the end of this email.

 The presentations are on the study of the back-to-back proton-(kaon+)
dihadron channel. More details can be found in my presentation during the
Nov colloboration meeting. I plan to present preliminary results of the
asymmetry modulation.

 Please let me know if you have any suggestions to improving these two
abstract.

Best regards,
Fatiha

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Abstract 1: for an undergraduate session

Study of the back-to-back proton-kaon kinematics in the ep -> e’p’KX
reaction with CLAS12 at Jefferson lab.

Authors: Alyssa Gadsby, Fatiha Benmokhtar, Timothy Hayward and Harut Avakian

Polarized 10 GeV electron beam was scattered off a liquid hydrogen target
during two run periods in 2018 and 2019 undergoing semi-inclusive deep
inelastic scattering and giving rise to different hadron species. In this
abstract I will present the experimental setup and my work on the
kinematical study of the ep->e’p’K+X channel. I  will explain the
detection mechanism and the selection of the back-to-back target
fragmentation proton and current fragmentation kaon.  Analysis techniques
for the beam single spin asymmetries for this channel will be presented as
well.

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Abstract 2: for the: Multi-Dimensional Structure of Hadrons mini-symposium

Extraction of preliminary Beam Single Spin Asymmetries  in the ep->
e’p’K+X reaction with CLAS12 at Jefferson Lab.

Authors: Fatiha Benmokhtar, Timothy Hayward, Harut Avakian and Alyssa Gadsby


Dihadron studies in semi-inclusive deep inelastic scattering of electrons
off nucleons has been the subject of intense theoretical and experimental
research investigations during the last couple of years.  Spin-orbit
correlations between target and current fragments can be tested by
studying back-to-back target-fragmentation and current fragmentation
hadrons in coincidence.  Such measurements on target-fragmentation protons
and current-fragmentation K+ were performed with the CLAS12 detector in
Hall B at Jefferson lab. Data taking spanned two run periods in 2018 and
2019. Preliminary results of the novel beam single spin asymmetry from
this ep→e’p’K+X reaction were obtained and hint to non-zero
sinΔϕ moments, where the Δϕ is the difference of
azimuthal angles between the two hadrons. This is an indication that
spin-orbit correlations between target and current fragments may be
significant. Further studies of the dependance of the modulation on the
product of transverse momenta will allow the tests of the fracture
function formalism. Future plans for the corrections towards the
extraction of final asymmetries, among which, but not only: particle
identification/mis-identification using the newest detector addition Ring
Imaging CHerenkov detector (RICH) will be discussed.


-- 
Fatiha Benmokhtar, PhD
Assistant Professor
Office: 306 Fisher Hall
Tel: 412-396-6353
Duquesne University, Pittsburgh, PA