Abstract:In Maxwell theory the constant electric charge e of the electron is consistent with the continuity equation ∂ µ j µ (x) = 0 where j µ (x) is the current density of the electron where the repeated indices component of a corresponding current density by integrating over the entire (physically) allowed volume, the color charge q a (t) of the quark in Yang-Mills theory is time dependent. In this paper we derive the general form of eight time dependent fundamental color charges q a (t) of the quark in Yang-Mills th… Show more
“…(21) we find that the light-like eikonal current produces pure gauge field in quantum field theory at all space-time points except at the positions perpendicular to the direction of motion of the charge at the time of closest approach, a result which agrees with the classical mechanics [41,49,50]. Hence we find from Eq.…”
Section: Closed-time Path Integral Formalism and The Generating Functsupporting
confidence: 80%
“…Hence, in some later works (see, for example, [55,56]) it was shown that perturbative predictions in QCD agree well with phenomenological QCD results (determined from heavy quarkonium spectroscopy) and lattice QCD calculations. For recent developments on color potential produced by the color charge of the quark, see [49,50].…”
Section: Closed-time Path Integral Formalism and The Generating Functmentioning
Recently we have proved the factorization of NRQCD S-wave heavy quarkonium production at all orders in coupling constant. In this paper we extend this to prove the factorization of infrared divergences in v cJ production from color singlet c c pair in non-equilibrium QCD at RHIC and LHC at all orders in coupling constant. This can be relevant to study the quark-gluon plasma at RHIC and LHC.
“…(21) we find that the light-like eikonal current produces pure gauge field in quantum field theory at all space-time points except at the positions perpendicular to the direction of motion of the charge at the time of closest approach, a result which agrees with the classical mechanics [41,49,50]. Hence we find from Eq.…”
Section: Closed-time Path Integral Formalism and The Generating Functsupporting
confidence: 80%
“…Hence, in some later works (see, for example, [55,56]) it was shown that perturbative predictions in QCD agree well with phenomenological QCD results (determined from heavy quarkonium spectroscopy) and lattice QCD calculations. For recent developments on color potential produced by the color charge of the quark, see [49,50].…”
Section: Closed-time Path Integral Formalism and The Generating Functmentioning
Recently we have proved the factorization of NRQCD S-wave heavy quarkonium production at all orders in coupling constant. In this paper we extend this to prove the factorization of infrared divergences in v cJ production from color singlet c c pair in non-equilibrium QCD at RHIC and LHC at all orders in coupling constant. This can be relevant to study the quark-gluon plasma at RHIC and LHC.
“…The light-like quark traveling with light-like four-velocity l µ produces SU(3) pure gauge field A µc (x) both in classical mechanics [21][22][23] and in quantum field theory [24] at all the timespace position x µ except at the position x perpendicular to the direction of motion of the quark ( l · x = 0) at the time of closest approach (x 0 = 0). When A µc (x) = A µc (λl) as in eq.…”
Section: Proof Of Factorization Of Infrared Divergences In Non-equmentioning
Theoretical understanding of the observed jet quenching measurements at RHIC and LHC is challenging in QCD because it requires understanding of parton to hadron fragmentation function in non-equilibrium QCD. In this paper, by using closed-time path integral formalism, we derive the gauge invariant definition of the gluon to hadron fragmentation function in non-equilibrium QCD which is consistent with factorization theorem in non-equilibrium QCD from first principles.
“…Maxwell Theory From Noether's Theorem Using eq. (15) in (17) we find that the spin angular momentum S γ of the electromagnetic field is given by…”
Section: Gauge Non-invariant Spin Angular Momentum Of Electromagneticmentioning
confidence: 98%
“…In Maxwell theory the electromagnetic potential A µ (x) produced at x µ by the electron in motion at X µ (τ ) with four-velocity u µ (τ ) = dX µ (τ ) dτ is given by [16,17] A…”
Section: Spin and Orbital Angular Momentum In Dirac-maxwell Theorymentioning
Due to proton spin crisis it is necessary to understand the gauge invariant definition of the spin and orbital angular momentum of the quark and gluon from first principle. In this paper we derive the gauge invariant Noether's theorem by using combined Lorentz transformation plus local gauge transformation. We find that the notion of the gauge invariant definition of the spin (or orbital) angular momentum of the electromagnetic field does not exist in Dirac-Maxwell theory although the notion of the gauge invariant definition of the spin (or orbital) angular momentum of the electron exists. We find that the gauge invariant definition of the spin angular momentum of the electromagnetic field in the literature is not correct because of the non-vanishing surface term in Dirac-Maxwell theory although the corresponding surface term vanishes for linear momentum. We also show that the Belinfante-Rosenfeld tensor is not required to obtain symmetric and gauge invariant energy-momentum tensor of the electron and the electromagnetic field in DiracMaxwell theory.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.