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Atreya, Abhishek; Srivastava, Ajit M.; Sarkar, Anjishnu

doi:10.1103/physrevd.85.014009

Cited by 15 publications

(20 citation statements)

References 49 publications

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“…The importance of Z(3) walls has also been discussed as non-trivial scattering of quarks from Z(3) walls. Its consequences for cosmology as well as for heavy ion collision have been explored [12][13][14][15], including the possibility of CP violating scattering of quarks from Z(3) walls leading to interesting observational implications [16].…”

Section: Introductionmentioning

confidence: 99%

Z(3) metastable states in a Polyakov quark meson model

Mohapatra

Mishra

2017

Phys. Rev. D

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We study the existence of Z(3) metastable states in the presence of the dynamical quarks within the ambit of Polyakov quark meson (PQM) model. Within the parameters of the model, it is seen that for temperatures Tm greater than the chiral transition temperature Tc, Z(3) metastable states exist ( Tm ∼ 310 MeV at zero chemical potential). At finite chemical potential Tm is larger than the same at vanishing chemical potential. We also observe a shift of (∼ 5• ) in the phase of the metastable vacua at zero chemical potential. The energy density difference between true and Z(3) metastable vacua is very large in this model. This indicates a strong explicit symmetry breaking effect due to quarks in PQM model. We compare this explicit symmetry breaking in PQM model with small explicit symmetry breaking as a linear term in Polyakov loop added to the Polyakov loop potential. We also study about the possibility of domain growth in a quenched transition to QGP in relativistic heavy ion collisions.PACS numbers: 12.38.Mh, 64.60.My

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Section: Introductionmentioning

confidence: 99%

Z(3) metastable states in a Polyakov quark meson model

Mohapatra

Mishra

2017

Phys. Rev. D

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“…CP violation was first discussed in [12,13], in context of baryogenesis. The exact background profile was calculated in [14], by making the gauge choice…”

Section: Cp Violating Quark Scattering From Z(3) Wallsmentioning

confidence: 99%

“…The origin of CP violation is spontaneous in nature. See [14] for detailed discussion on this aspect.…”

Section: Cp Violating Quark Scattering From Z(3) Wallsmentioning

confidence: 99%

Reviving quark nuggets as a candidate for dark matter.

Atreya¹

2017

Proceedings of 7th International Conference on Physics and Astrophysics of Quark Gluon Plasma — PoS(ICPAQGP2015)

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We discuss a novel mechanism for segregation of baryons and anti-baryons in the quark-gluon plasma phase which can lead to formation of quark and antiquark nuggets in the early universe, irrespective of the order of the quark-hadron phase transition. This happens due to CP violating scattering of quarks and antiquarks from moving Z(3) domain walls. CP violation here is spontaneous in nature and arises from the nontrivial profile of the background gauge field (A 0 ) between different Z(3) vacua. We study the effect of this spontaneous CP violation on the baryon transport across the collapsing large Z(3) domain walls (which can arise in the context of certain low energy scale inflationary models). Our results show that this CP violation can lead to large concentrations of baryons and anti-baryons in the early universe. The quark and antiquark nuggets, formed by this alternate mechanism, can provide a viable dark matter candidate within standard model without violating any observational constraints.

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“…There, the quark scattering was from L( x) profile ( In (Atreya et al, 2012), exact background profile was calculated by making the gauge choice…”

Section: Cp Violating Quark Scattering From Z(3) Wallsmentioning

confidence: 99%

“…The origin of CP violation is spontaneous in nature. See (Atreya et al, 2012) for detailed discussion on this aspect. …”

Section: Cp Violating Quark Scattering From Z(3) Wallsmentioning

confidence: 99%

Nuggets Anti-Nuggets Formation from QCD Z(3) Domains

Atreya¹,

Sarkar²,

Srivastava³

2015

Proceedings of the Indian National Science Academy

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We investigate the possibility of segregation of baryons and anti-baryons in the quark-gluon plasma phase in the early universe due to CP violating scattering of quarks and antiquarks from moving Z(3) domain walls. CP violation here is spontaneous in nature and arises from the nontrivial profile of the background gauge field (A 0 ) between different Z(3) vacua. We study the effect of this spontaneous CP violation on the baryon transport across the collapsing large Z(3) domain walls (which can arise in the context of certain low energy scale inflationary models). Our results show that this CP violation will lead to the segregation of baryons and anti-baryons in early universe near the confinement-deconfinement phase tranition epoch. We discuss consequences of this baryon anti baryon segregation in the subsequent cosmological evolution.

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SpontaneousCPviolation in quark scattering from QCDZ(3)interfaces

Cited by 15 publications

References 49 publications

Z(3) metastable states in a Polyakov quark meson model

Z(3) metastable states in a Polyakov quark meson model

Reviving quark nuggets as a candidate for dark matter.

Nuggets Anti-Nuggets Formation from QCD Z(3) Domains

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