scholarly journals Beam spin asymmetry in the electroproduction of a pseudoscalar meson or a scalar meson off the scalar target

2019 ◽  
Vol 99 (11) ◽  
Author(s):  
Chueng-Ryong Ji ◽  
Ho-Meoyng Choi ◽  
Andrew Lundeen ◽  
Bernard L. G. Bakker
Keyword(s):  
Pseudoscalar Meson ◽  
Scalar Meson ◽  
Spin Asymmetry ◽  
Beam Spin Asymmetry

scholarly journals Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy regionEγ=1.1–2.3 GeV

2015 ◽  
Vol 91 (5) ◽  
Author(s):  
N. Zachariou ◽  
Y. Ilieva ◽  
B. L. Berman ◽  
N. Ya. Ivanov ◽  
M. M. Sargsian ◽  
...  
Keyword(s):  
Spin Asymmetry ◽  
Deuteron Photodisintegration ◽  
Beam Spin Asymmetry

scholarly journals Extraction of ALUsin(ϕ) moments from the hard exclusive π+ channel in a wide range of kinematics with CLAS

2020 ◽  
Vol 1643 (1) ◽  
pp. 012187
Author(s):  
Stefan Diehl ◽  
Kyungseon Joo
Keyword(s):  
Spin Asymmetry ◽  
Smooth Transition ◽  
Parton Distributions ◽  
Generalized Parton Distributions ◽  
Transition Distribution ◽  
Clear Sign ◽  
Sign Change ◽  
Wide Range ◽  
Large Acceptance ◽  
Beam Spin Asymmetry

Abstract The beam-spin asymmetry (BSA) has been measured for the hard exclusive e p → e n π+ reaction over a wide range of kinematics in the deep inelastic regime. The measurements were performed with the CEBAF Large Acceptance Spectrometer (CLAS) using a 5.5 GeV polarized electron beam at Jefferson Lab (JLAB). The ϕ dependence of the BSA as well as the −t, Q 2 and xB dependence of the extracted ALU sin(ϕ) moment will be presented. For ALU sin(ϕ) a clear sign change can be observed between pions emitted in forward and backward direction with a smooth transition around 90° in CM. The results will be discussed in the context of formalisms depending on generalized parton distributions (GPDs) and transition distribution amplitudes (TDAs), which can be used to describe complementary kinematic regimes.

scholarly journals Measurement of the beam spin asymmetry of e→p→e′p′η in the deep-inelastic regime with CLAS

2019 ◽  
Vol 789 ◽  
pp. 426-431 ◽  
Author(s):  
B. Zhao ◽  
A. Kim ◽  
K. Joo ◽  
I. Bedlinskiy ◽  
W. Kim ◽  
...  
Keyword(s):  
Spin Asymmetry ◽  
Beam Spin Asymmetry

scholarly journals A novel beam–spin asymmetry in double-hadron inclusive lepto-production

2012 ◽  
Vol 713 (3) ◽  
pp. 317-320 ◽  
Author(s):  
M. Anselmino ◽  
V. Barone ◽  
A. Kotzinian
Keyword(s):  
Spin Asymmetry ◽  
Beam Spin Asymmetry

scholarly journals Study of the hyperon-nucleon interaction via final-state interactions in exclusive reactions

2020 ◽  
Author(s):  
Nicholas Zachariou ◽  
Daniel Watts ◽  
Yordanka Ilieva
Keyword(s):  
Spin Asymmetry ◽  
Thomas Jefferson ◽  
Large Set ◽  
Nuclear System ◽  
Nucleon Interaction ◽  
Final State ◽  
Novel Approach ◽  
Final State Interactions ◽  
Beam Spin Asymmetry

A novel approach that allows access to long-sought information on the Hyperon-Nucleon (YN) interaction was developed by producing a hyperon beam within a few-body nuclear system, and studying final-state interactions. The determination of polarisation observables, and specifically the beam spin asymmetry, in exclusive reactions allows a detailed study of the various final-state interactions and provides us with the tools needed to isolate kinematic regimes where the YN interaction dominates. High-statistics data collected using the CLAS detector housed in Hall-B of the Thomas Jefferson laboratory allows us to obtain a large set of polarisation observables and place stringent constraints on the underlying dynamics of the YN interaction.

scholarly journals The Tensor and the Scalar Charges of the Nucleon from Hadron Phenomenology

2018 ◽  
Vol 172 ◽  
pp. 03007
Author(s):  
A. Courtoy
Keyword(s):  
Standard Model ◽  
Spin Asymmetry ◽  
Beyond The Standard Model ◽  
Scalar Charge ◽  
The Standard Model ◽  
Asymmetry Data ◽  
Fragmentation Functions ◽  
The Impact ◽  
Beam Spin Asymmetry

We discuss the impact of the determination of the nucleon tensor charge on searches for physics Beyond the Standard Model. We also comment on the future extraction of the subleading-twist PDF e(x) from Jefferson Lab soon-to-be-released Beam Spin Asymmetry data as well as from the expected data of CLAS12 and SoLID, as the latter is related to the scalar charge. These analyses are possible through the phenomenology of Dihadron Fragmentation Functions related processes, which we report on here as well.

WEAK DECAYS OF B−, $\bar{B}^0$ MESONS TO A PSEUDOSCALAR AND A SCALAR MESON IN THE FINAL STATE

1996 ◽  
Vol 11 (01) ◽  
pp. 129-139 ◽  
Author(s):  
A.C. KATOCH ◽  
R.C. VERMA
Keyword(s):  
Quark Model ◽  
Pseudoscalar Meson ◽  
Scalar Meson ◽  
Form Factors ◽  
Branching Ratios ◽  
Matrix Elements ◽  
Final State ◽  
Factorization Scheme ◽  
Weak Decays

Using the factorization scheme, we study two-body exclusive weak decays of B– and [Formula: see text] mesons to a pseudoscalar meson and a scalar meson in the final state. Employing the Isgur-Scora-Grinstein-Wise quark model to obtain the form factors involved in the decay matrix elements, we calculate the branching ratios for the decays involving b→c transition.

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