Properties of nucleon in nuclear matter: once more

Abstract

We calculate the mass and residue of the nucleon in nuclear matter in the frame work of QCD sum rules using the nucleon's interpolating current with an arbitrary mixing parameter. We evaluate the effects of the nuclear medium on these quantities and compare the results obtained with the existing theoretical predictions. The results are also compared with those obtained in vacuum to find the shifts in the quantities under consideration. Our calculations show that these shifts in the mass and residue are about 32 and 15 %, respectively.

Analysis of the strong coupling form factors of Σ b NB and Σ c ND in QCD sum rules

“…The decay constant parameters used in this work are taken as: f B =(248 ± 23 exp ± 25 V ub ) MeV [52], f D =(205.8 ± 8.5 ± 2.5) MeV [53], λ 2 N =(0.0011 ± 0.0005)GeV 6 [54], λ Σ b =(0.062 ± 0.018)GeV 3 [55], and λ Σc =(0.045 ± 0.015)GeV 3 [55]. We take the masses of the hadrons from Ref.…”

In-medium properties of pseudoscalar $$D_s$$ D s and $$B_s$$ B s mesons

“…Here the possibility of the errors may occur only through the third term of Eq. (14) and therefore special care is taken while dealing with it [83]. In this respect, the value of the continuum threshold parameter, s 0 , is fixed so as to reproduce the vacuum masses for the D s and B s mesons.…”

“…Furthermore, using Eqs. (10), (11) and (14) the shift in the masses and decay constants of D s /B s mesons can be expressed in terms of a and b as [82,83] …”

“…Also, we apply the Borel transformation on the forward scattering amplitude T N (ω, 0) calculated in operator product expansion (OPE) side in the rest frame of the nuclear matter. Then we equate these Borel transformed hadronic and OPE sides of the T N (ω, 0) functions, and proceeding with this analysis leads to the relation between a, b and the strange quark and gluon condensates as in [82,83]. Thus, we have…”

Fate of the doubly heavy spin- 3/2 baryons in a dense medium

“…The in-medium properties of light baryons have been investigated in Refs. [40][41][42][43][44]. The fate of the heavy baryons with single heavy quark in dense medium was studied in [45][46][47][48].…”