scholarly journals Probing gluon dynamics by charm and bottom mesons in nuclear matter in heavy-meson effective theory with1/Mcorrections

2014 ◽  
Vol 89 (1) ◽  
Author(s):  
S. Yasui ◽  
K. Sudoh
Keyword(s):  
Nuclear Matter ◽  
Heavy Meson ◽  
Effective Theory ◽  
Bottom Mesons

AN EFFECTIVE THEORY FOR NUCLEAR MATTER WITH GENUINE MANY-BODY FORCES

2012 ◽  
Vol 18 ◽  
pp. 182-190 ◽  
Author(s):  
CÉSAR A. Z. VASCONCELLOS ◽  
JORGE HORVATH ◽  
DIMITER HADJIMICHEF ◽  
ROSANA O. GOMES
Keyword(s):  
Nuclear Matter ◽  
Dense Matter ◽  
New Physics ◽  
Theoretical Research ◽  
Effective Theory ◽  
Many Body ◽  
Conceptual Issue ◽  
Body Forces ◽  
Nuclear Systems ◽  
Space Dynamics

Nuclear science has developed many excellent descriptions that embody various properties of the nucleus, and nuclear matter at low, medium and high densities. However, a full microscopic understanding of nuclear systems is still lacking. The aim of our theoretical research group is to shed some light on such challenges and particularly on open questions facing the high density nuclear many-body problem. Here we focus our attention on the conceptual issue of naturalness and its role in shaping the baryon-meson phase space dynamics in the description of the equation of state (EoS) of nuclear matter. In particular, in order to stimulate possible new directions of research, we discuss relevant aspects of a recently developed relativistic effective theory for nuclear matter with natural parametric couplings and genuine many-body forces. Among other topics we discuss in this work the connection of this theory with other known effective QHD models of the literature and its potentiality in describing a new physics for dense matter.

scholarly journals An approach to the instanton effect in B system

2018 ◽  
Vol 33 (02) ◽  
pp. 1850017
Author(s):  
Noriaki Kitazawa ◽  
Yuki Sakai
Keyword(s):  
Mass Spectrum ◽  
Chiral Symmetry Breaking ◽  
Light Quark ◽  
Heavy Meson ◽  
Effective Theory ◽  
Meson Mass ◽  
Quark Masses ◽  
Quark Interaction ◽  
Up Quark ◽  
Instanton Effect

We discuss the constraint on the size of QCD instanton effects in low-energy effective theory. Among various instanton effects in meson mass spectrum and dynamics, we concentrate on the instanton-induced masses of light quarks. The famous instanton-induced six-quark interaction, so-called ’t Hooft vertex, could give nonperturbative quantum corrections to light quark masses. Many works have already been achieved to constrain the mass corrections in light meson system, or the system of [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text], and now we know for a fact that the instanton-induced mass of up-quark is too small to realize the solution of the strong CP problem by vanishing current mass of up-quark. In this work, we give a constraint on the instanton-induced mass correction to light quarks from the mass spectrum of heavy mesons, [Formula: see text], [Formula: see text], [Formula: see text] and their antiparticles. To accomplish this, the complete second-order chiral symmetry breaking terms are identified in heavy meson effective theory. We find that the strength of the constraint from heavy meson masses is at the same level of that from light mesons, and it would be made even stronger by more precise data from future [Formula: see text] factories and lattice calculations.

Symmetry-breaking corrections to the form factors for heavy-to-heavy B-meson at large recoil

2019 ◽  
Vol 34 (08) ◽  
pp. 1950046
Author(s):  
Saba Shafaq ◽  
Ishtiaq Ahmed ◽  
M. Jamil Aslam
Keyword(s):  
Perturbation Theory ◽  
Symmetry Breaking ◽  
Heavy Quark ◽  
B Meson ◽  
Form Factors ◽  
Heavy Meson ◽  
Effective Theory ◽  
Vertex Corrections ◽  
Soft Collinear Effective Theory ◽  
Heavy Quark Limit

The present study investigates the decay of B to heavy meson using the soft collinear effective theory. By assigning different loop momenta, the factorization has been tested and it is found to be valid to all orders in the perturbation theory. It is noted that theory contains one hard collinear and two soft modes depending upon virtuality of different momenta. In the next step, symmetry-conserving relations (in heavy quark limits) to the form factors have been studied. These relations are then used to parametrize the form factors to get symmetry-breaking corrections. These symmetry-breaking corrections can be calculated using perturbative (vertex corrections) as well as nonperturbative (hard spectator interactions) QCD. It is found that in the heavy quark limit, these symmetry contributions do not contribute to the form factors that appear in physical observables for the case of [Formula: see text] decays which are contrary to the heavy-to-light meson decays.

scholarly journals EXOTIC QUARKONIUM SPECTROSCOPY: X(3872), Zb(10610), AND Zb(10650) IN NON-RELATIVISTIC EFFECTIVE THEORY

2014 ◽  
Vol 35 ◽  
pp. 1460431
Author(s):  
THOMAS MEHEN
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Bound States ◽  
Effective Field ◽  
Effective Theory ◽  
Recent Developments ◽  
Bottom Mesons

This talk summarizes recent developments in quarkonium spectroscopy. I comment on the relation between the Zb(10610) and Zb(10650) and recently observed Zc(3900) and Zc(4025) states. Then I discuss a number of calculations using non-relativistic effective field theory for the X(3872), Zb(10610), and Zb(10650), under the assumption that these are shallow molecular bound states of charm or bottom mesons.

scholarly journals Distribution amplitudes of heavy mesons and quarkonia on the light front

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Fernando E. Serna ◽  
Roberto Correa da Silveira ◽  
J. J. Cobos-Martínez ◽  
Bruno El-Bennich ◽  
Eduardo Rojas
Keyword(s):  
Heavy Quark ◽  
Pion Mass ◽  
Heavy Meson ◽  
Light Front ◽  
Effective Theory ◽  
Heavy Quark Effective Theory ◽  
Decay Constants ◽  
Quark Sector ◽  
Pseudoscalar Mesons ◽  
Inverse Moment

AbstractThe ladder kernel of the Bethe–Salpeter equation is amended by introducing a different flavor dependence of the dressing functions in the heavy-quark sector. Compared with earlier work this allows for the simultaneous calculation of the mass spectrum and leptonic decay constants of light pseudoscalar mesons, the $$D_u$$ D u , $$D_s$$ D s , $$B_u$$ B u , $$B_s$$ B s and $$B_c$$ B c mesons and the heavy quarkonia $$\eta _c$$ η c and $$\eta _b$$ η b within the same framework at a physical pion mass. The corresponding Bethe–Salpeter amplitudes are projected onto the light front and we reconstruct the distribution amplitudes of the mesons in the full theory. A comparison with the first inverse moment of the heavy meson distribution amplitude in heavy quark effective theory is made.

New developments for a chiral effective theory of nuclear matter

2011 ◽  
Author(s):  
J. A. Oller ◽  
A. Lacour ◽  
U.-G. Meißner
Keyword(s):  
Nuclear Matter ◽  
Effective Theory ◽  
New Developments

scholarly journals Light-front heavy-quark effective theory and heavy-meson bound states

1995 ◽  
Vol 52 (5) ◽  
pp. 2915-2925 ◽  
Author(s):  
Chi-Yee Cheung ◽  
Wei-Min Zhang ◽  
Guey-Lin Lin
Keyword(s):  
Heavy Quark ◽  
Bound States ◽  
Heavy Meson ◽  
Light Front ◽  
Effective Theory ◽  
Heavy Quark Effective Theory

Galilean covariant effective theory for bound states of heavy mesons

2018 ◽  
Vol 33 (30) ◽  
pp. 1850180
Author(s):  
L. M. Abreu ◽  
M. de Montigny ◽  
E. S. Santos ◽  
D. F. C. A. Silva
Keyword(s):  
Bound States ◽  
Degrees Of Freedom ◽  
Dimensional Space ◽  
Heavy Meson ◽  
Effective Theory ◽  
Heavy Mesons ◽  
Interaction Terms ◽  
Effective Lagrangian ◽  
Dimensional Space Time ◽  
Covariant Version

In this work we formulate the Galilei-covariant version of an effective theory containing nonrelativistic heavy mesons and pions as degrees of freedom. This manifestly Galilean covariant framework is based on a five-dimensional space–time that has been used in the description of covariant nonrelativistic physics. In this context, effective Lagrangian is introduced without ambiguities, containing kinetic and interaction terms that are naturally Galilean invariant. The leading-order scattering amplitudes and the properties of possible heavy-meson bound states are calculated and discussed.

scholarly journals Heavy meson tomography of cold nuclear matter at the electron-ion collider

2021 ◽  
Vol 816 ◽  
pp. 136261
Author(s):  
Hai Tao Li ◽  
Ze Long Liu ◽  
Ivan Vitev
Keyword(s):  
Nuclear Matter ◽  
Heavy Meson ◽  
Cold Nuclear Matter
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