We reply to the Comment of X. Ji [arXiv:0810.4913] on our paper [PRL 100:232002 (2008)], concerning angular momentum algebra, locality, Lorentz covariance, and measurability of our gauge-invariant description of the spin and orbital angular momentum of quarks and gluons.

2008-12-23hep-ph

Reply to the Comment of X. Ji on "Do gluons carry half of the nucleon momentum?" [PRL 103:062001 (2009)]

We affirm that the proper momentum defined in [PRL 103:062001 (2009)] does respect exact gauge symmetry and is as measurable as the kinetic momentum. The physical part of the gauge field is also as measurable as the electromagnetic field. The Comment of Ji [arXiv:0910.5022] is due to a misunderstanding of our work, and a typical confusion of our gauge-invariant formalism with the specific Coulomb-gauge calculation.

2009-11-02hep-ph

Reply to Comment [arXiv:0809.2310] on Universal Charge-Radius Relation for Subatomic and Astrophysical Compact Objects [arXiv:0804.2140, PRL100 (2008) 151102]

A reply to arXiv:0809.2310, "Comment on Universal Charge-Radius Relation for Subatomic and Astrophysical Compact Objects" [arXiv:0804.2140,PRL100(2008)151102]

2008-10-14astro-phhep-phnucl-th

Reply to Comment on "Bare quark matter surfaces of strange stars and $e^+e^-$ emission"

I reply to A. Mitra's comment on my PRL paper "Bare quark matter surfaces of strange stars and $e^+e^-$ emission". I show that his points of criticism are not correct.

1998-11-12astro-phhep-phnucl-th

Comment on "Spin and Orbital Angular Momentum in Gauge Theories: Nucleon Spin Structure and Multipole Radiation Revisited"

This is a comment on Chen et al Letter PRL,100, 232002 (2008).

2008-07-04hep-phphysics.gen-ph

Reply to Comment on "Surprises in threshold antikaon-nucleon physics"

In their Comment, Borasoy et al. [arXiv:hep-ph/0512279], criticize our results [PRL 95 (2005) 172502] that accommodate both scattering data and the new accurate measurement by DEAR of the shift and width of kaonic hydrogen. In our calculations we have employed unitary chiral perturbation theory (UCHPT). We discuss why their arguments are irrelevant or do not hold.

2006-01-13hep-phnucl-exnucl-th