Nuclear Theory·nucl-th

Monday·September 7, 2015

6 papers—3 primary·3 cross-listed

01
Understanding the proton radius puzzle: Nuclear structure effects in light muonic atoms
Chen Ji🇨🇦 · Oscar Javier Hernandez🇨🇦 · Nir Nevo Dinur🇮🇱 · Sonia Bacca🇨🇦 · Nir Barnea🇮🇱
We present calculations of nuclear structure effects to the Lamb shift in light muonic atoms. We adopt a modern ab-initio approach by combining state-of-the-art nuclear potentials with the hyperspherical harmonics method. Our calculations are instrumental to the determination of nuclear charge radii in the Lamb shift measurements, which will shed light on the proton radius puzzle.
nucl-thphysics.atom-phEPJ Web Conf.(2016)·7 citations
02
Interactions of $B_{c}$ Meson in Relativistic Heavy-Ion Collisions
Shaheen Irfan · Faisal Akram · Bilal Masud
We calculate the absorbtion cross-sections of $B_{c}$ mesons by $π$ and $ρ$ mesons including anomalous processes using an effective hadronic Lagrangian. The enhancement of Bc production is expected due to QGP formation in heavy-ion experiments. However it is also expected that the production rate of Bc meson can be affected due to the interaction with comovers. These processes are relevant for experiments at RHIC. Thermal average cross-sections of $B_{c}$ are evaluated with form factor when a cut off parameter in it is 1 and 2 GeV. Using these thermal average cross-sections in the kinetic equation we investigate the time evolution of $B_{c}$ mesons due to dissociation in the hadronic matter formed at RHIC.
nucl-thPRC(2019)·4 citations
03
Toward an understanding of the $R_{AA}$ and $v_{2}$ puzzle for heavy quarks
Francesco Scardina🇮🇹 · Santosh K Das🇮🇹 · Salvatore Plumari🇮🇹 · Jessica I. Bellone🇮🇹 · Vincenzo Greco🇮🇹
One of the primary aims of the ongoing nuclear collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies is to create a Quark Gluon Plasma (QGP). The heavy quarks constitutes a unique probe of the QGP properties. Both at RHIC and LHC energies a puzzling relation between the nuclear modification factor $R_{AA} (p_{T})$ and the elliptic flow $v_{2} (p_{T})$ related to heavy quark has been observed which challenged all the existing models.\\ We discuss how the temperature dependence of the heavy quark drag coefficient can address for a large part of such a puzzle. We have considered four different models to evaluate the temperature dependence of drag and diffusion coefficients propagating through a quark gluon plasma (QGP). All the four different models are set to reproduce the same $R_{AA} (p_{T})$ experimentally observed at RHIC energy. We have found that for the same $R_{AA} (p_{T})$ one can generate $2 - 3$ times more $v_{2}$ depending on the temperature dependence of the heavy quark drag coefficient.
nucl-thhep-phNucl.Part.Phys.Proc.(2016)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE

Understanding the proton radius puzzle: Nuclear structure effects in light muonic atoms

Interactions of Bc​ Meson in Relativistic Heavy-Ion Collisions

Toward an understanding of the RAA​ and v2​ puzzle for heavy quarks

Affiliations

Interactions of $B_{c}$ Meson in Relativistic Heavy-Ion Collisions

Toward an understanding of the $R_{AA}$ and $v_{2}$ puzzle for heavy quarks