12-18 August 2012
US/Eastern timezone

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Relics of Quark Hadron Phase Transition in the Microsecond Universe with a “little inflation”

16 Aug 2012, 16:00
2h
Regency 1/3 and Ambassador ()

Regency 1/3 and Ambassador

Poster New theoretical developments Poster Session Reception

Speaker

Bikash Sinha

Description

The conventional scenario to date of the quark hadron phase transition in the microsecond old universe is essentially guided by lattice calculation leading to a cross over from quarks to hadrons. However, it is entirely possible that Affleck – Dine mechanism of baryogenesis leading to a large baryon asymmetry is more natural than in other models along the route baryogenesis via leptogenesis. In this model [1] the universe is assumed to begin with a large baryon chemical potential through an Affleck – Dine mechanism and then undergoes a “little (or tepid) inflation” after crossing the QCD first-order phase transition line, while remaining in a deconfined and a chirally symmetric phase. We exploit first order phase transition [2] and examine critically what could be the relics. Candidates such as “Strange Quark Nuggets” (SQN), even Dark energy and floating “orphan” quarks are going to be discussed. [1] T. Boeckel and J. Schaffner – Bielich Phys. Rev. Letts 105, 041301 (2010). [2] P. Bhattacharya, J. Alam, S. Raha and B. Sinha, Phys. Rev. D 48, 4630 (1993) A. Bhattacharya, J. Alam. S. Sarkar, P. Roy, B. Sinha, S. Raha and P. Bhattacharya, Phys. Rev. D 61, 093509 (2000)

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