Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Kampfer, Burkhard"'
The impact of the core mass on the compact/neutron-star mass-radius relation is studied. Besides the mass, the core is parameterized by its radius and surface pressure, which supports the outside one-component Standard Model (SM) matter. The core may
Externí odkaz:
http://arxiv.org/abs/2302.01389
Autor:
Titov, Alexander I., Kampfer, Burkhard
We study the non-linear Breit-Wheeler process $\vec \gamma' + \vec L \to e^+ + e^-$ in the interaction of linearly polarized probe photons ($\vec \gamma'$) with a linearly polarized laser beam ($\vec L$). In particular, we consider the asymmetry of t
Externí odkaz:
http://arxiv.org/abs/2006.04496
Autor:
Zöllner, Rico, Kampfer, Burkhard
A holographic model of probe vector mesons (quarkonia) is presented, where the dynamical gravity-dilaton background is adjusted to the thermodynamics of 2 +1 flavor QCD with physical quark masses. The vector meson action is modified to account for va
Externí odkaz:
http://arxiv.org/abs/2002.07200
Autor:
Zöllner, Rico, Kampfer, Burkhard
Publikováno v:
Eur. Phys. J. Plus 135 (2020) 3, 304
Asymptotic AdS Riemann space-times in five dimensions with a black brane (horizon) sourced by a fully back-reacted scalar field (dilaton) offer -- via the holographic dictionary -- various options for the thermodynamics of the flat four-dimensional b
Externí odkaz:
http://arxiv.org/abs/1807.04260
Publikováno v:
J. Phys. G 45 (2018) 085104
Utilizing QCD sum rules, we extract the temperature dependences of the spectral properties of the pseudo-scalar and scalar D mesons regarded as chiral partners. Besides the masses also decay constants are analyzed as the D meson yields in heavy-ion c
Externí odkaz:
http://arxiv.org/abs/1801.01472
Autor:
Zöllner, Rico, Kampfer, Burkhard
Publikováno v:
J. Conf. Ser. 878, 012023 (2017)
Within an extended soft wall model, we study the temperature dependence of the lowest vector meson states. Scales are adjusted by using as input the $\rho$ meson mass in vacuum and the velocity of sound from lattice QCD which displays a minimum at $T
Externí odkaz:
http://arxiv.org/abs/1703.02958
Autor:
Zöllner, Rico, Kampfer, Burkhard
Publikováno v:
Eur. Phys. J. A 53, 139 (2017)
The soft wall model is extended to accommodate at the same time (i) approximately linear $\rho$ meson Regge trajectories at zero temperature $T$, (ii) various options for the thermodynamics with reference to QCD (cross over or second-order transition
Externí odkaz:
http://arxiv.org/abs/1701.01398
In our contribution we give a brief overview of two widely discussed quantum processes: electron-positron pairs production off a probe photon propagating through a polarized short-pulsed electromagnetic (e.m.) (e.g.\ laser) wave field or generalized
Externí odkaz:
http://arxiv.org/abs/1612.00264
Autor:
Wunderlich, Falk, Kampfer, Burkhard
The quark meson (linear sigma) model with linearized fluctuations displays at a critical end point the onset of a curve of first-order phase transitions (FOPTs) located at non-zero chemical potentials and temperatures below a certain cross-over tempe
Externí odkaz:
http://arxiv.org/abs/1611.10139
Publikováno v:
Acta Phys. Polon. B 10, 789 (2017)
The soft-wall model, emerging as bottom-up holographic scenario anchored in the AdS/CFT correspondence, displays the disappearance of normalisable modes referring to vector mesons at a temperature $T_{\dis}$ depending on the chemical potential $\mu$,
Externí odkaz:
http://arxiv.org/abs/1611.04124