Generalized helicity formalism, higher moments, and theB→KJK(→Kπ)ℓ1¯ℓ2angular distributions
نویسندگان
چکیده
منابع مشابه
Generalized Parton Distributions with Helicity Flip
We show that for both quarks and gluons there are eight generalized parton distributions in the proton: four which conserve parton helicity and four which do not. We explain why time reversal invariance does not reduce this number from eight to six, as previously assumed in the literature.
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An approach recently proposed to calculate the nucleon generalized parton distributions (GPDs) in a constituent quark model (CQM) scenario, considering the constituent quarks as complex systems, is used here to obtain helicitydependent GPDs. They are obtained from the wave functions of the non relativistic CQM of Isgur and Karl, convoluted with the helicity-dependent GPDs of the constituent qua...
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Generalized parton distributions with helicity flip are studied in the quark sector, within a simple version of the MIT bag model, assuming an SU(6) wave function for the proton target. In the framework under scrutiny it turns out that only the generalized transversity distribution, H T , is non vanishing. For this quantity, the forward limit is properly recovered and numerical results are foun...
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The geometry of unitN -dimensional lp balls (denoted here by BN,p) has been intensively investigated in the past decades. A particular topic of interest has been the study of the asymptotics of their projections. Apart from their intrinsic interest, such questions have applications in several probabilistic and geometric contexts Barthe et al. (2005). In this paper, our aim is to revisit some kn...
متن کاملHelicity dependent parton distributions
The helicity dependent parton distributions describe the number density of partons with given longitudinal momentum x and given polarization in a hadron polarized longitudinally with respect to its motion. After the discovery , more than 70 years ago , that the proton is not elementary , the observation of Bjorken scaling in the late 1960s lead to the idea of hadrons containing almost pointlike...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2016
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.93.054008