Scenario of baryogenesis

نویسنده

  • D. L. Khokhlov
چکیده

Scenario of baryogenesis is considered in which primordial plasma starting from the Planck scale consists of primordial particles being the precursors of electrons and clusters of particles being the precursors of protons. Equilibrium between the precursors of protons and the precursors of electrons is defined by the proton-electron mass difference. At the temperature equal to the mass of electron, primordial particles transit into protons, electrons, photons. Standard scenario of baryogenesis occurs as follows [1]. In the thermodynamically equilibrium primordial plasma, all the particles with m ≤ T exist in equal abundances per spin degree of freedom. This means that, at T > mp, there exist approximately equal abundances of protons p and antiprotons p̄. Excess of baryonic charge arises in the processes of X, Ybosons decays under the following conditions: non-conservation of the baryonic charge and CP-violation. At T < mp, pp̄ annihilate, with the excess of p survives. Let us consider another scenario of baryogenesis in which primordial plasma starting from the Planck scale T = mP l consists of primordial fermions. At T = me, primordial fermions transit into protons, electrons, photons. Let us assume that primordial plasma consists of primordial fermions which have only spin quantum number. That is primordial plasma consists of primordial fermions with the spin up ↑ and down ↓. Then the sequence of transformations ↑↓↑↓↑ transits the particle into itself. Let us identify simple particle ↑ with the precursor of electron and the cluster of particles ↑↓↑↓↑ with the precursor of proton. The probability of finding such a cluster is given by w = ( 1 2 )5 . (1) Equilibrium between the precursors of protons and the precursors of electrons is defined by the proton-electron mass difference. The proton-electron ratio is given by

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

Electroweak Phase Transition and Baryogenesis

Our universe is apparently matter dominant. Although CP violation is experimentally proven, the full scenario of baryogenesis remains to be unsolved. Matter asymmetry is discussed briefly in this paper and electroweak phase transition (EWPT) is presented as one possible scenario of baryogenesis. Bounds on the Higgs boson mass for such scenario for Standard Model (SM) and Minimal Supersymmetric ...

متن کامل

Curvaton Scenario with Affleck-Dine Baryogenesis

We discuss the curvaton scenario with the Affleck-Dine baryogenesis. In this scenario, non-vanishing baryonic entropy fluctuation may be generated even without primordial fluctuation of the Affleck-Dine field. Too large entropy fluctuation is inconsistent with the observations and hence constraints on the curvaton scenario with the Affleck-Dine baryogenesis are obtained. We calculate the baryon...

متن کامل

Electroweak Baryogenesis with Cosmic Strings? Electroweak Baryogenesis with Cosmic Strings?

I report on a critical analysis of the scenario of electroweak baryoge-nesis mediated by nonsuperconducting cosmic strings. This mechanism relies upon electroweak symmetry restoration in a region around cosmic strings, where sphalerons would be unsuppressed. I discuss the various problems this scenario has to face, presenting a careful computation of the sphaleron rates inside the strings, of t...

متن کامل

Bino-driven electroweak baryogenesis with highly suppressed Electric Dipole Moments

It is conventional wisdom that successful electroweak baryogenesis in the Minimal Supersymmetric extension of the Standard Model (MSSM) is in tension with the non-observation of electric dipole moments (EDMs), since the level of CP-violation responsible for electroweak baryogenesis is believed to generate unavoidably large EDMs. We show that CP-violation in the bino-Higgsino sector of the MSSM ...

متن کامل

نقض CP و گذار فاز الکتروضعیف در مدل دو هیگزی

In this paper, an analytic treatment of electroweak phase transition is proposed within the two-Higgs doublet model. This phase transition occurs in one stage and is strongly first order. Therefore, it can be applied to the electroweak baryogenesis scenario, whereas the standard model cannot provide this condition considering the experimental data. Also, we study CP violation which is one of th...

متن کامل

Affleck-Dine baryogenesis after thermal brane inflation

We propose a new scenario of Affleck-dine baryogenesis in the context of theories with large extra dimensions. In this paper we consider baryogenesis after thermal brane inflation and show how our mechanism works. We specifically consider models in which supersymmetry is broken at the distant brane.

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 1999