scholarly journals QCD sum rule analysis for light vector and axial-vector mesons in vacuum and nuclear matter

2001 ◽  
Vol 64 (1) ◽  
Author(s):  
Stefan Leupold
Keyword(s):  
Nuclear Matter ◽  
Axial Vector ◽  
Vector Mesons ◽  
Sum Rule ◽  
Light Vector ◽  
Rule Analysis

scholarly journals Vector and axial-vector mesons in nuclear matter

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
Ralf-Arno Tripolt ◽  
Christopher Jung ◽  
Lorenz von Smekal ◽  
Jochen Wambach
Keyword(s):  
Nuclear Matter ◽  
Axial Vector ◽  
Vector Mesons

scholarly journals Light Vector Mesons in Nuclear Matter

1996 ◽  
Vol 95 (6) ◽  
pp. 1009-1028 ◽  
Author(s):  
T. Hatsuda ◽  
H. Shiomi ◽  
H. Kuwabara
Keyword(s):  
Nuclear Matter ◽  
Vector Mesons ◽  
Light Vector

scholarly journals On the radiative decays of light vector and axial-vector mesons

2008 ◽  
Vol 813 (1-2) ◽  
pp. 96-170 ◽  
Author(s):  
M.F.M. Lutz ◽  
S. Leupold
Keyword(s):  
Axial Vector ◽  
Radiative Decays ◽  
Vector Mesons ◽  
Light Vector

scholarly journals ANALYSIS OF MASS MODIFICATIONS OF THE VECTOR AND AXIAL VECTOR HEAVY MESONS IN THE NUCLEAR MATTER WITH THE QCD SUM RULES

2013 ◽  
Vol 28 (14) ◽  
pp. 1350049 ◽  
Author(s):  
ZHI-GANG WANG
Keyword(s):  
Nuclear Matter ◽  
Sum Rules ◽  
Axial Vector ◽  
Vector Mesons ◽  
Qcd Sum Rules ◽  
Heavy Mesons ◽  
Scattering Lengths ◽  
Mass Shifts

In this paper, we calculate the mass modifications of the vector and axial vector mesons D*, B*, D1 and B1 in the nuclear matter with the QCD sum rules, and obtain the mass-shifts δMD* = -71 MeV , δMB* = -380 MeV , δMD1 = 72 MeV , δMB1 = 264 MeV , and the scattering lengths aD* = -1.07 fm , aB* = -7.17 fm , aD1 = 1.15 fm and aB1 = 5.03 fm for the D*N, B*N, D1N and B1N interactions, respectively.

MEDIUM MODIFICATIONS OF LIGHT VECTOR MESONS IN PHOTOPRODUCTION REACTIONS AT JLAB

2009 ◽  
Vol 24 (02n03) ◽  
pp. 309-316
Author(s):  
◽  
M. H. WOOD ◽  
C. DJALALI ◽  
R. NASSERIPOUR ◽  
D. WEYGAND
Keyword(s):  
Mass Spectrum ◽  
Nuclear Matter ◽  
Mass Spectra ◽  
Decay Channel ◽  
Theoretical Calculations ◽  
Meson Mass ◽  
Vector Mesons ◽  
Small Shift ◽  
Light Vector ◽  
Dense Nuclear Matter

Theoretical calculations predict the modification of properties of vector mesons, such as a shift in their masses and/or broadening of their widths in dense nuclear matter. These effects can be related to partial restoration of chiral symmetry at high density or temperature. The light vector mesons (ρ, ω, and ϕ) were photo-produced on 2 H , C , Ti , Fe , and Pb targets at the Thomas Jefferson National Laboratory using the CEBAF Large Acceptance Spectrometer (CLAS). The data were taken with a beam of tagged photons with energies up to 4 GeV. The properties of the ρ vector meson at normal nuclear densities and zero temperature,were investigated via their rare leptonic decay to e+e-. This decay channel is preferred over hadronic modes in order to eliminate final state interactions in the nuclear matter. A combinatorial background was subtracted from the invariant mass spectra using a well-established event-mixing technique. The ρ meson mass spectrum was extracted after the ω and ϕ signals were removed in a nearly model-independent way. The rho meson mass distributions were extracted for each of the targets. Comparisons were made between the ρ mass spectra from the heavy targets ( A > 2) with the mass spectrum extracted from the deuterium target. With respect to the ρ-meson mass, we obtain a small shift compatible with zero. Also, we measure widths consistent with standard nuclear many-body effects such as collisional broadening and Fermi motion. In this experiment, due to the long lifetimes and momenta greater than 0.8 GeV, the ω and ϕ mesons have a high probability of decaying outside the nucleus in their vacuum state. However, their in-medium widths can be accessed through their absorption inside the nucleus. Preliminary results on the ratios of the nuclear transparencies of the ω and ϕ mesons as a function of the number of target nucleons A, have been obtained and indicate a substantial widening in the medium.

scholarly journals Light vector mesons ( ω , ρ , and ϕ ) in strong magnetic fields: A QCD sum rule approach

2019 ◽  
Vol 100 (1) ◽  
Author(s):  
Amruta Mishra ◽  
Ankit Kumar ◽  
Pallabi Parui ◽  
Sourodeep De
Keyword(s):  
Magnetic Fields ◽  
Vector Mesons ◽  
Sum Rule ◽  
Strong Magnetic Fields ◽  
Light Vector ◽  
Rule Approach
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