A Matter-Antimatter Universe?
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TLDR
In this article, it was shown that the universe can be a patchwork consisting of distinct regions of matter and antimatter, and that after recombination, it is impossible to avoid annihilation near regional boundaries.Abstract:
We ask whether the universe can be a patchwork consisting of distinct regions of matter and antimatter. We demonstrate that, after recombination, it is impossible to avoid annihilation near regional boundaries. We study the dynamics of this process to estimate two of its signatures: a contribution to the cosmic diffuse γ-ray background and a distortion of the cosmic microwave background. The former signal exceeds observational limits unless the matter domain we inhabit is virtually the entire visible universe. On general grounds, we conclude that a matter-antimatter symmetric universe is empirically excluded.read more
Citations
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A facility to search for hidden particles at the CERN SPS: the SHiP physics case.
Sergey Alekhin,Wolfgang Altmannshofer,Takehiko Asaka,Brian Batell,Fedor Bezrukov,Kyrylo Bondarenko,Alexey Boyarsky,Ki-Young Choi,Cristóbal Corral,Nathaniel Craig,David Curtin,Sacha Davidson,Sacha Davidson,André de Gouvêa,Stefano Dell'Oro,Patrick deNiverville,P. S. Bhupal Dev,Herbi K. Dreiner,Marco Drewes,Shintaro Eijima,Rouven Essig,Anthony Fradette,Björn Garbrecht,Belen Gavela,Gian F. Giudice,Mark D. Goodsell,Mark D. Goodsell,Dmitry Gorbunov,Stefania Gori,Christophe Grojean,Alberto Guffanti,Thomas Hambye,Steen Honoré Hansen,Juan Carlos Helo,Juan Carlos Helo,Pilar Hernández,Alejandro Ibarra,Artem Ivashko,Artem Ivashko,Eder Izaguirre,Joerg Jaeckel,Yu Seon Jeong,Felix Kahlhoefer,Yonatan Kahn,Andrey Katz,Andrey Katz,Andrey Katz,Choong Sun Kim,Sergey Kovalenko,Gordan Krnjaic,Valery E. Lyubovitskij,Valery E. Lyubovitskij,Valery E. Lyubovitskij,Simone Marcocci,Matthew McCullough,David McKeen,Guenakh Mitselmakher,Sven Moch,Rabindra N. Mohapatra,David E. Morrissey,Maksym Ovchynnikov,Emmanuel A. Paschos,Apostolos Pilaftsis,Maxim Pospelov,Maxim Pospelov,Mary Hall Reno,Andreas Ringwald,Adam Ritz,Leszek Roszkowski,Valery Rubakov,Oleg Ruchayskiy,Oleg Ruchayskiy,Ingo Schienbein,Daniel Schmeier,Kai Schmidt-Hoberg,Pedro Schwaller,Goran Senjanovic,Osamu Seto,Mikhail Shaposhnikov,Lesya Shchutska,J. Shelton,Robert Shrock,Brian Shuve,Michael Spannowsky,Andrew Spray,Florian Staub,Daniel Stolarski,Matt Strassler,Vladimir Tello,Francesco Tramontano,Anurag Tripathi,Sean Tulin,Francesco Vissani,Martin Wolfgang Winkler,Kathryn M. Zurek,Kathryn M. Zurek +95 more
TL;DR: It is demonstrated that the SHiP experiment has a unique potential to discover new physics and can directly probe a number of solutions of beyond the standard model puzzles, such as neutrino masses, baryon asymmetry of the Universe, dark matter, and inflation.
Journal ArticleDOI
Leptogenesis as the origin of matter
TL;DR: In this paper, the authors explore in some detail the hypothesis that the generation of a primordial lepton-antilepton asymmetry (Leptogenesis) early on in the history of the universe is the root cause for the origin of matter.
Journal ArticleDOI
Origin of the matter-antimatter asymmetry
TL;DR: A review of the current state of our understanding of baryogenesis with emphasis on those scenarios that we consider most plausible can be found in this article, where the authors consider the following scenarios: sphaleron Baryogenesis at the electroweak phase transition in the Standard Model, and supersymmetry at the Large Hadron Collider.
Journal ArticleDOI
A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
Sergey Alekhin,Wolfgang Altmannshofer,Takehiko Asaka,Brian Batell,Fedor Bezrukov,Kyrylo Bondarenko,Alexey Boyarsky,Nathaniel Craig,Ki-Young Choi,Cristóbal Corral,David Curtin,Sacha Davidson,André de Gouvêa,Stefano Dell'Oro,Patrick deNiverville,P. S. Bhupal Dev,Herbi K. Dreiner,Marco Drewes,Shintaro Eijima,Rouven Essig,Anthony Fradette,Björn Garbrecht,Belen Gavela,Gian F. Giudice,Dmitry Gorbunov,Stefania Gori,Christophe Grojean,Mark D. Goodsell,Alberto Guffanti,Thomas Hambye,Steen Honoré Hansen,Juan Carlos Helo,Pilar Hernández,Alejandro Ibarra,Artem Ivashko,Eder Izaguirre,Joerg Jaeckel,Yu Seon Jeong,Felix Kahlhoefer,Yonatan Kahn,Andrey Katz,Choong Sun Kim,Sergey A. Kovalenko,Gordan Krnjaic,Valery E. Lyubovitskij,Simone Marcocci,Matthew McCullough,David McKeen,Guenakh Mitselmakher,Sven-Olaf Moch,Rabindra N. Mohapatra,David E. Morrissey,Maksym Ovchynnikov,Emmanuel A. Paschos,Apostolos Pilaftsis,Maxim Pospelov,Mary Hall Reno,Andreas Ringwald,Adam Ritz,Leszek Roszkowski,Valery Rubakov,Oleg Ruchayskiy,Jessie Shelton,Ingo Schienbein,Daniel Schmeier,Kai Schmidt-Hoberg,Pedro Schwaller,Goran Senjanovic,Osamu Seto,Mikhail Shaposhnikov,Brian Shuve,Robert Shrock,Lesya Shchutska,Michael Spannowsky,Andrew Spray,Florian Staub,Daniel Stolarski,Matt Strassler,Vladimir Tello,Francesco Tramontano,Anurag Tripathi,Sean Tulin,Francesco Vissani,Martin Wolfgang Winkler,Kathryn M. Zurek +84 more
TL;DR: The SHiP (Search for Hidden Particles) experiment at CERN as discussed by the authors was designed to search for new physics in the largely unexplored domain of very weakly interacting particles with masses below the Fermi scale, inaccessible to the LHC experiments.
Journal ArticleDOI
Primordial black holes
TL;DR: In this paper, the mechanisms of primordial black hole formation are discussed and observational constraints on the PBH spectrum, or effects of PBH evaporation, are shown to restrict a wide range of particle physics models, predicting an enhancement of the ultraviolet part of the spectrum of density perturbations.
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