Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Nazaryan, Vahagn"'
We present the derivation of the formulas for the proton structure-dependent terms in the hyperfine splitting of muonic hydrogen. We use compatible conventions throughout the calculations to derive a consistent set of formulas that reconcile differen
Externí odkaz:
http://arxiv.org/abs/1101.3239
We present a precise determination of the polarizability and other proton structure dependent contributions to the hydrogen hyperfine splitting, based heavily on the most recent published data on proton spin dependent structure functions from the EG1
Externí odkaz:
http://arxiv.org/abs/0805.2603
Publikováno v:
Phys.Rev.Lett.96:163001,2006
We present a state-of-the-art evaluation of the polarizability corrections--the inelastic nucleon corrections--to the hydrogen ground-state hyperfine splitting using analytic fits to the most recent data. We find a value $\Delta_{\rm pol} = 1.3 \pm 0
Externí odkaz:
http://arxiv.org/abs/hep-ph/0512108
Autor:
Nazaryan, Vahagn, Carlson, Carl E.
Publikováno v:
Int.J.Mod.Phys. A20 (2005) 3495-3501
In this talk we present a field theoretical model constructed in Minkowski N=1 superspace with a deformed supercoordinate algebra. Our study is motivated in part by recent results from super-string theory, which show that in a particular scenario in
Externí odkaz:
http://arxiv.org/abs/hep-th/0411018
Autor:
Nazaryan, Vahagn, Carlson, Carl E.
Publikováno v:
Phys.Rev. D71 (2005) 025019
There is much discussion of scenarios where the space-time coordinates x^\mu are noncommutative. The discussion has been extended to include nontrivial anticommutation relations among spinor coordinates in superspace. A number of authors have studied
Externí odkaz:
http://arxiv.org/abs/hep-th/0410056
Publikováno v:
Phys.Rev. D70 (2004) 037501
We present a consistent color-flavor-spin-orbital wave function for a positive parity Theta^+ that naturally explains the observed narrowness of the state. The wave function is totally symmetric in its flavor-spin part and totally antisymmetric in it
Externí odkaz:
http://arxiv.org/abs/hep-ph/0312325
Publikováno v:
Phys.Lett. B579 (2004) 52-58
We consider the possibility that the lightest pentaquark is a parity even state, with one unit of orbital angular momentum. Working within the framework of a constituent quark model, we show that dominant spin-flavor interactions render certain parit
Externí odkaz:
http://arxiv.org/abs/hep-ph/0310038
Publikováno v:
Phys.Lett. B573 (2003) 101-108
We consider the mass splittings and strong decays of members of the lowest-lying pentaquark multiplet, which we take to be a parity-odd antidecuplet. We derive useful decompositions of the quark model wave functions that allow for easy computation of
Externí odkaz:
http://arxiv.org/abs/hep-ph/0307396
Publikováno v:
Phys.Rev. D68 (2003) 054004
Recently a version of Lorentz-conserving noncommutative field theory (NCFT) has been suggested. The underlying Lie algebra of the theory is the same as that of Doplicher, Fredenhagen, and Roberts. In Lorentz-conserving NCFT the matrix parameter {thet
Externí odkaz:
http://arxiv.org/abs/hep-ph/0305225
Autor:
Nazaryan, Vahagn
Publikováno v:
Phys.Rev. D67 (2003) 017704
Carlson, Carone and Lebed have derived the Feynman rules for a consistent formulation of noncommutative QCD. The results they obtained were used to constrain the noncommutativity parameter in Lorentz violating noncommutative field theories. However,
Externí odkaz:
http://arxiv.org/abs/hep-ph/0210300