Nuclear Theory·nucl-th

Monday·August 17, 2015

5 papers—2 primary·3 cross-listed

01
[Submitted on 14 Aug 2015]
Hadron interferences in the proton induced coherent $η$ meson production reaction on a scalar-isovector nucleus
Swapan Das🇮🇳
The coherent $η$ meson energy $E_{η}$ distribution spectra in the proton nucleus reaction have been calculated to investigate the $π^{0} - η$ mesons' interference, in addition to the study of resonance $N^{*}$ dynamics in the nucleus. The elementary reaction occurring in the nucleus is assumed to proceed as $pN \to p N^{*}$ ; $N^{*} \to N η$ . Born terms in the intermediate state is also considered. In a scalar-isovector nucleus, this reaction occurs because of $π^{0}$ and $η$ meson exchange interactions for the forward going proton and $η$ meson; other meson exchange potentials do not contribute in this process. The sensitivity of the cross section to the hadron nucleus interactions, and the beam energy dependence of the cross section are studied for this reaction.
Comments:
20 pages, 5 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1508.03423 [pdf]
PRC(2015)·2 citations
02
[Submitted on 14 Aug 2015]
J=3/2 charmed hypertriton
H. Garcilazo🇲🇽 · A. Valcarce🇪🇸 · T.F. Carames🇪🇸
By solving exact three-body equations, we study the three-baryon system with charm $+ 1$ . We look for possible bound states using baryon-baryon interactions obtained from a chiral constituent quark model. The smaller effect of the $Λ_{c} \leftrightarrow Σ_{c}$ conversion reverses the order of the $(I, J) = (0, 1/2)$ and $(I, J) = (0, 3/2)$ states, rather close on the strange sector. The diminishing of the kinetic energy due to the large reduced mass gives rise to a bound state in the $(I, J) = (0, 3/2)$ channel. After correcting for Coulomb effects the binding energy would be between 140 and 715 keV.
Comments:
12 pages, 5 figures. To appear in Phys. Rev. C. arXiv admin note: text overlap with arXiv:hep-ph/0701275
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1508.03535 [pdf]
PRC(2015)·23 citations
03
[Submitted on 10 Aug 2015] (cross-list from hep-th)
The no-drag frame for anomalous chiral fluid
Mikhail A. Stephanov🇺🇸 · Ho-Ung Yee🇺🇸
We show that for an anomalous fluid carrying dissipationless chiral magnetic and/or vortical currents there is a frame in which a stationary obstacle experiences no drag, but energy and charge currents do not vanish, resembling superfluidity. However, unlike ordinary superfluid flow, the anomalous chiral currents do transport entropy in this frame. We show that the second law of thermodynamics completely determines the amounts of these anomalous non-dissipative currents in the "no-drag frame" as polynomials in temperature and chemical potential with known anomaly coefficients. These general results are illustrated and confirmed by a calculation in the chiral kinetic theory and quark-gluon plasma at high temperature.
Comments:
5 pages (v2 with minor bug fixes)
Subjects:
High Energy Physics — Theory (hep-th); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Nuclear Theory (nucl-th)
arXiv:
1508.02396 [pdf]
PRL(2016)·46 citations
04
[Submitted on 21 Jan 2015] (cross-list from hep-ph)
The Helicity Amplitude for $1/2$ and $3/ 2^{+}$ Baryon in the Pseudo-Meson Photoproduction in the Quark Model
Leihua Liu🇳🇱 · Liye Xiao🇨🇳
We derive the separate helicity amplitudes involving the partial wave analysis in the process of pseudo-scalar meson photon productions with $J^{P} = 3/ 2^{+}$ , which is independent on model. According to parity, the general amplitude in the case of $J^{P} = 1/ 2^{-}$ is given out. We prove this general amplitude is corresponding to the situation of $λ = - 1$ as adopting the circular polarization. Finally, the formulas of scattering amplitudes involving the photon-meson production with $J^{P} = 3/ 2^{+}$ are obtained from the chiral quark model.
Comments:
Since my former supervisor require me to withdraw this paper
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1508.03370 [pdf]
0 citations
05
[Submitted on 14 Aug 2015] (cross-list from hep-ph)
Solving the Balitsky-Kovchegov equation at next to leading order accuracy
T. Lappi🇫🇮 · H. Mäntysaari🇫🇮
We present the first numerical solution to the next to leading order Balitsky-Kovchegov (BK) equation in coordinate space in the large- $N_{c}$ limit. In addition to the dipole operator we also solve the evolution of the "conformal dipole" for which the conformal invariance breaking double logarithmic term is absent from the evolution equation. The NLO corrections are shown to slow down the evolution. We show that the solution depends strongly on the details of the initial condition, and that the solution to the equation is not positive definite with all initial conditions relevant for phenomenological applications.
Comments:
4 pages, 4 figures. Talk given by H.M. at the 7th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (Hard Probes 2015)
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1508.03434 [pdf]
Nucl.Part.Phys.Proc.(2016)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE

Hadron interferences in the proton induced coherent η meson production reaction on a scalar-isovector nucleus

J=3/2 charmed hypertriton

The no-drag frame for anomalous chiral fluid

The Helicity Amplitude for 1/2 and 3/2+ Baryon in the Pseudo-Meson Photoproduction in the Quark Model

Solving the Balitsky-Kovchegov equation at next to leading order accuracy

Affiliations

Hadron interferences in the proton induced coherent $η$ meson production reaction on a scalar-isovector nucleus

The Helicity Amplitude for $1/2$ and $3/ 2^{+}$ Baryon in the Pseudo-Meson Photoproduction in the Quark Model