WebOct 23, 2024 · q g → q g: Spinor Helicity Formalism. I am calculating the cross-section for quark gluon to quark gluon scattering in the spinor helicity formalism. This process has … Webknown gluon helicity parton distribution function (PDF), in the quark and gluon OAM or in the small Bjorken x region, whose contribution to the proton polarization has not been explored. Indeed, experimental measurements of the double-longitudinal spin asymmetryA LL, which is used to extract the quark and gluon helicity PDFs, are always limited ...
Transverse momentum-dependent parton distribution functions …
WebThis equation is the differential cross-section in terms of the production angle, , the production angles of the particle from the decay in the rest frame, , , and the production angles of the anti-particle from the decay in the rest frame, , .Thus it is known as the 5-fold differential cross-section. With a final state of four fermions all the possible final helicity … WebDec 28, 2024 · We compute the helicity-dependent strange quark distribution in the proton in the framework of chiral effective theory. Starting from the most general chiral SU(3) … randy x gerald mpreg
Christopher Cocuzza - Doctoral Student - Temple University
A chiral phenomenon is one that is not identical to its mirror image (see the article on mathematical chirality). The spin of a particle may be used to define a handedness, or helicity, for that particle, which, in the case of a massless particle, is the same as chirality. A symmetry transformation between the two is called parity transformation. Invariance under parity transformation by a Dirac fermion is called chiral symmetry. WebFlavor Decomposition of the Sea-Quark Helicity Distributions in the Nucleon from Semiinclusive Deep Inelastic Scattering Riccardo Fabbri 2004, Physical Review Letters WebMar 1, 2024 · Specializing to quantum chromodynamics (QCD), we solve the on-shell recursion relations in the presence of two pairs of massive quarks and an arbitrary … owa webmail fe