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We study the dynamical generation of the chiral chemical potential in a Weyl metal constructed from a three-dimensional optical lattice and subject to synthetic gauge fields. By numerically solving the Boltzmann equation with the Berry…

Quantum Gases · Physics 2016-06-28 Tomoya Hayata , Masahito Ueda

Initial states of dense matter with nonzero electron chiral imbalance could potentially give rise to strong magnetic fields through chiral plasma instability. Previous work indicated that unless chiral chemical potential is as large as the…

High Energy Physics - Phenomenology · Physics 2026-05-01 Srimoyee Sen , Varun Vaidya

We investigate the chiral magnetic effect (CME) under a strong magnetic field B = B_0 x_3 at low temperature T < T^chi_c. For this purpose, we employ the instanton vacuum configuration with the finite instanton-number fluctuation Delta,…

High Energy Physics - Phenomenology · Physics 2010-01-07 Seung-il Nam

A popular class of theories attributes the matter-antimatter asymmetry of the Universe to CP-violating decays of super-heavy BSM particles in the Early Universe. Recently, we discovered a new source of leptogenesis in these models, namely…

High Energy Physics - Phenomenology · Physics 2017-04-12 J. I. McDonald , G. M. Shore

As a result of the Standard Model chiral anomalies, baryon number is violated in the early universe in the presence of a hypermagnetic field with varying helicity. We investigate whether the matter / anti-matter asymmetry of the universe…

Cosmology and Nongalactic Astrophysics · Physics 2016-09-14 Kohei Kamada , Andrew J. Long

We explore the possibility that the observed baryon asymmetry of the universe is the result of an earlier phase transition in which an extended gauge sector breaks down into the $SU(3)_C \times SU(2)_L \times U(1)_Y$ of the Standard Model.…

High Energy Physics - Phenomenology · Physics 2008-11-26 Jing Shu , Tim M. P. Tait , Carlos E. M. Wagner

Effective theory framework based on symmetry has recently gained widespread interest in the field of cosmology. In this paper, we apply the same idea on the genesis of the primordial magnetic field and its evolution throughout the…

High Energy Physics - Theory · Physics 2021-05-26 Debaprasad Maity , Sourav Pal , Tanmoy Paul

We estimate the chirality of the cosmological medium due to parity violating decays of standard model particles, focusing on the example of tau leptons. The non-trivial chirality is however too small to make a significant contribution to…

High Energy Physics - Phenomenology · Physics 2021-05-26 Tanmay Vachaspati , Alexander Vilenkin

We revisit the Chiral Magnetic Effect (CME) using the chiral Lagrangian. We demonstrate that the electric-current formula of the CME is derived immediately from the contact part of the Wess-Zumino-Witten action. This implies that the CME…

High Energy Physics - Phenomenology · Physics 2015-06-05 Kenji Fukushima , Kazuya Mameda

We evaluate the constraints that the COBE observations put on baryogenesis in inflationary cosmologies.We consider the supersymmetric version of the proposal of Fukugita and Yanagida, that the baryon asymmetry of the universe is created by…

High Energy Physics - Phenomenology · Physics 2009-09-15 B. A. Campbell , S. Davidson , K. A. Olive

We propose a mechanism called sphalerogenesis to explain the baryon asymmetry of the universe (BAU). The BAU is explained by a CP-violating decay of the electroweak sphaleron. We introduce a dimension-six operator constructed from weak…

High Energy Physics - Phenomenology · Physics 2026-05-05 Masanori Tanaka

The non-central Cu + Au collisions can create strong out-of-plane magnetic fields and in-plane electric fields. By using the HIJING model, we study the general properties of the electromagnetic fields in Cu + Au collisions at 200 GeV and…

Nuclear Theory · Physics 2015-02-17 Wei-Tian Deng , Xu-Guang Huang

The seesaw mechanism with three heavy Majorana right-handed neutrinos provides an elegant explanation for neutrino masses and, combined with leptogenesis, can generate the baryon asymmetry of the universe (BAU). Naturally embedded in a…

High Energy Physics - Phenomenology · Physics 2025-05-06 Juan Herrero-Garcia , Giacomo Landini , Tsutomu T. Yanagida

The Chiral Magnetic Effect (CME) is predicted for Au-Au collisions at RHIC. However many backgrounds can give signals that make the measurement hard to interpret. The STAR experiment has made measurements at different collisions energy…

Nuclear Theory · Physics 2014-12-15 R. S. Longacre

The chiral magnetic effect (CME) is a novel transport phenomenon, arising from the interplay between quantum anomalies and strong magnetic fields in chiral systems. In high-energy nuclear collisions, the CME may survive the expansion of the…

Through analyzing the quark propagator under the magnetic field, we establish that the axial anomaly originates from an additional Dirac structure in quark propagator induced by the magnetic field. This Dirac structure also allows one to…

High Energy Physics - Theory · Physics 2026-04-28 Fei Gao , Yi Lu , Minghui Ding , Xinyang Wang , Yuxin Liu

For (3+1)-dimensional fermions, a net axial charge and external magnetic field can lead to a current parallel to the magnetic field. This is the chiral magnetic effect. We use gauge-gravity duality to study the chiral magnetic effect in…

High Energy Physics - Theory · Physics 2015-05-28 Carlos Hoyos , Tatsuma Nishioka , Andy O'Bannon

The Chiral Magnetic Effect (CME) is predicted for mid-peripheral Au-Au collisions $\sqrt{s_{NN}}$=200 GeV at RHIC. However many backgrounds can give signals that make the measurement hard to interpret. The STAR experiment has made a…

Nuclear Theory · Physics 2011-12-12 Ron Longacre

Gravitational leptogenesis refers to a class of baryogenesis models in which the matter-antimatter asymmetry of the universe arises through the standard model lepton-number gravitational anomaly. In these models chiral gravitational waves…

High Energy Physics - Phenomenology · Physics 2018-02-21 Peter Adshead , Andrew J. Long , Evangelos I. Sfakianakis

CP violation and the violation of baryon-minus-lepton number B-L do not necessarily have to occur simultaneously in order to accomplish successful leptogenesis. Instead, it suffices if new CP-violating interactions at high energies result…

High Energy Physics - Phenomenology · Physics 2023-02-07 Valerie Domcke , Kohei Kamada , Kyohei Mukaida , Kai Schmitz , Masaki Yamada