Phi meson spectral moments and QCD condensates in nuclear matter
نویسندگان
چکیده
منابع مشابه
Rho Meson Properties in Nuclear Matter from Qcd Sum Rules∗
We study the properties of rho mesons in nuclear matter by means of QCD sum rules at finite density. For increased sensitivity, we subtract out the vacuum contributions. With the spectral function as estimated in the literature, these subtracted sum rules are found to be not well satisfied. We suppose that Landau singularities from higher resonance states in the nearby region in this channel ar...
متن کاملThe Spectral Function of the Rho Meson in Nuclear Matter ∗
We calculate the modification of a rho meson in nuclear matter through its coupling to resonance-hole states. Starting from a recently proposed model, we include all four star resonances up to 1.9 GeV. In contrast to previous works, we include not only resonances that couple to the rho in a relative p-wave, but also those that couple to an s-wave state. In addition, we solve the equation for th...
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φ-meson mass in nuclear matter (m∗φ) is investigated using an effective Lagrangian of φ interacting with octet baryons. m∗φ decreases by a few % in nuclear matter due to the current conservation and effective nucleon/hyperon masses. Its implication to the p-A and A-A collisions are briefly discussed. Submitted to Prog. Theor. Phys.
متن کاملThe Ρ-meson and Related Meson Wave Functions in Qcd Sum Rules with Nonlocal Condensates
We apply the nonlocal condensate formalism to construct generalized sum rules (including O(αs)-radiative corrections) for π-, ρand ρ -meson wave functions of twist 2. Besides, we predict the lepton decay constant fρ′ and estimate the mass of ρ -meson. For all these mesons we obtain the first 10 moments of longitudinal wave functions, suggest the models for them and discuss their properties. We ...
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We summarize the current theoretical and experimental status of the spectral changes of vector mesons (ρ, ω, φ) at finite baryon density. Various approaches including QCD sum rules, effective theory of hadrons and bag models show decreasing of the vector meson masses in nuclear matter. Possibility to detect the mass shift through lepton pairs in γ −A, p− A and A− A reactions are also discussed.
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2016
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2016.04.018