ep - p h / 02 09 18 4 v 1 1 7 Se p 20 02 Stability of strange quark matter : model dependence

نویسنده

  • W. M. Alberico
چکیده

The minimum energy per baryon number of strange quark matter is studied , as a function of the strangeness fraction, in the MIT bag model and in two different versions of the Color Dielectric Model: a comparison is made with the hyperon masses having the same strangeness fraction, and coherently calculated within both models. Calculations are carried out in mean field approximation, with one gluon exchange corrections. The results allow to discuss the model dependence of the stability of strangelets: they can be stable in the MIT bag model and in the double minimum version of the Color Dielectric Model, while the single minimum version of the Color Dielectric Model excludes this possibility.

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ar X iv : h ep - p h / 02 02 09 8 v 1 1 1 Fe b 20 02 COLOR - FLAVOR ( UN - ) LOCKING

The structure of the phase diagram of strongly interacting matter at moderate densities is calculated within a 3-flavor NJL-type quark model with realistic quark masses. We focus on the influence of the selfcon-sistently determined effective strange quark mass on the color-flavor unlocking phase transition.

متن کامل

ar X iv : h ep - p h / 02 05 25 1 v 1 2 2 M ay 2 00 2 Strange quark matter in a chiral SU ( 3 ) quark mean field model

We apply the chiral SU(3) quark mean field model to investigate strange quark matter. The stability of strange quark matter with different strangeness fraction is studied. The interaction between quarks and vector mesons destabilizes the strange quark matter. If the strength of the vector coupling is the same as in hadronic matter, strangelets can not be formed. For the case of β equilibrium, t...

متن کامل

ar X iv : h ep - p h / 02 09 33 2 v 1 2 7 Se p 20 02 1 K → ππ Electroweak Penguins in the Chiral Limit

We report on dispersive and finite energy sum rule analyses of the electroweak penguin matrix elements (ππ)2|Q7,8|K 0 in the chiral limit. We accomplish the correct perturbative matching (scale and scheme dependence) at NLO in αs, and we describe two different strategies for numerical evaluation.

متن کامل

ep - p h / 07 02 00 4 v 1 3 1 Ja n 20 07 Theory Summary : Quark Matter 2006

I report on the theoretical developments discussed in Quark Matter 2006.

متن کامل

ar X iv : h ep - p h / 02 09 18 0 v 1 1 7 Se p 20 02 Models of

It is usually supposed that inflation is of the slow-roll variety, and that the inflaton generates the primordial curvature perturbation. According to the curvaton hypothesis, inflation need not be slow-roll, and if it is the inflaton generates a negligible curvature perturbation. We find that the construction of slow-roll inflation models becomes much easier under this hypothesis. Also, therma...

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

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008