QCD sum rules for quark–gluon three-body components in the B meson

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Magnetic moment of the ρ-meson in QCD sum rules

The magnetic moment μ of the ρ-meson is calculated in the framework of QCD sum rules in external fields. Bare loop calculations (parton model) give: μpart = 2.0. The contribution of operators of dimension 6 reduces this value: μ = 1.5± 0.3. ∗e-mail:[email protected]

متن کامل

Thermal QCD Sum Rules for σ(600) Meson

In the present work, the temperature dependence of the scalar mesons parameters is investigated in the framework of thermal QCD sum rules. We calculate σ -pole and the non-resonant two-pion continuum contributions to the spectral density. Taking into account additional operators appearing at finite temperature, the thermal QCD sum rules are derived. The temperature dependence of the shifts in t...

متن کامل

What QCD sum rules tell about the rho meson ∗

Using a simple parametrization of Breit-Wigner type for the hadronic side of the QCD sum rule for ρ mesons in vacuum as well as in a nuclear medium we explore the range of values for the mass and the width of the ρ meson which are compatible with the operator product expansion. PACS numbers: 24.85.+p, 21.65.+f, 12.38.Lg, 14.40.Cs Typeset using REVTEX ∗Work supported by GSI Darmstadt and BMBF.

متن کامل

Scalar-Meson-Baryon Coupling Constants in QCD Sum Rules

The external-field QCD Sum Rules method is used to evaluate the coupling constants of the light-isoscalar scalar meson (“σ” or ǫ) to the Λ, Σ, and Ξ baryons. It is shown that these coupling constants as calculated from QCD Sum Rules are consistent with SU(3)-flavor relations, which leads to a determination of the F/(F + D) ratio of the scalar octet assuming ideal mixing: we find αs ≡ F/(F + D) ...

متن کامل

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 کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Nuclear Physics B

سال: 2014

ISSN: 0550-3213

DOI: 10.1016/j.nuclphysb.2013.12.007