Aspects of Bottom-up Hidden Sector Models

Aspects of Bottom-up Hidden Sector Models
Author :
Publisher : Presses universitaires de Louvain
Total Pages : 220
Release :
ISBN-10 : 9782390610021
ISBN-13 : 2390610021
Rating : 4/5 (021 Downloads)

Book Synopsis Aspects of Bottom-up Hidden Sector Models by : Philipp Klose

Download or read book Aspects of Bottom-up Hidden Sector Models written by Philipp Klose and published by Presses universitaires de Louvain. This book was released on 2020-11-26 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: The standard model (SM) of particle physics is a hugely successful theory of nature, but it is incomplete. E.g., it cannot explain finite SM neutrino masses or the origin of the primordial baryon asymmetry (BAU). One way to address such problems is to postulate the existence of new but hidden particles. This thesis studies such "hidden sectors" in two ways: 1) An effective theory approach, where electroweak (EW) and GeV scale portal effective theories (PETs) are constructed that couple the SM to a generic light hidden mediator of spin 0, 1⁄2, or 1. The EW scale PETs include all portal operators of dimension d≤5. The GeV scale PETs additionally include all leading order (LO) flavour changing portal operators of dimension d≤6,7. They are used to derive a LO PET chiral perturbation theory Lagrangian that describes hidden sector induced light meson transitions in fixed target experiments like NA62 or SHiP. 2) An investigation of the type-I seesaw model, which couples the SM to n≥2 sterile neutrinos that can generate a BAU via “leptogenesis”. It is shown that thermal and spectator effects can result in a sign-flip and strong relative enhancement of the BAU in high-scale leptogenesis with two hierarchical sterile neutrinos of vanishing initial abundance. Much lighter sterile neutrinos may be detected via lepton number violating (LNV) decays at colliders, but LNV decays could be suppressed relative to lepton number conserving decays for 't Hooft natural parameter choices. It is shown that the corresponding parameter space consists of three regions: (a)with unsuppressed LNV decays, (b)with suppressed LNV decays, (c)with suppressed and unsuppressed LNV decays.

Aspects of Bottom-up Hidden Sector Models Related Books

Aspects of Bottom-up Hidden Sector Models
Language: en
Pages: 220
Authors: Philipp Klose
Categories: Science
Type: BOOK - Published: 2020-11-26 - Publisher: Presses universitaires de Louvain

GET EBOOK

The standard model (SM) of particle physics is a hugely successful theory of nature, but it is incomplete. E.g., it cannot explain finite SM neutrino masses or
A Search for Exotic Higgs Decays
Language: en
Pages: 201
Authors: Jackson Burzynski
Categories: Science
Type: BOOK - Published: 2023-05-23 - Publisher: Springer Nature

GET EBOOK

The absence of new physics at the TeV scale observed thus far at the Large Hadron Collider (LHC) motivates an increasing focus on searches for weakly-coupled ne
Relativity, Particle Physics And Cosmology - Proceedings Of The Richard Arnowitt Fest
Language: en
Pages: 394
Authors: Roland E Allen
Categories:
Type: BOOK - Published: 1999-02-04 - Publisher: World Scientific

GET EBOOK

This volume outlines the status of fundamental physics at the threshold of the 21st century. Some of the world's leading theorists and experimentalists discuss
Argument in the Greenhouse
Language: en
Pages: 438
Authors: Sujata Gupta
Categories: Science
Type: BOOK - Published: 2005-10-05 - Publisher: Routledge

GET EBOOK

How can greenhouse gases be controlled and reduced? Will it be in time? This book adds a significant new contribution to the crucial climate change/global warmi
The Standard Model and Beyond
Language: en
Pages: 786
Authors: Paul Langacker
Categories: Science
Type: BOOK - Published: 2017-06-26 - Publisher: CRC Press

GET EBOOK

This new edition of The Standard Model and Beyond presents an advanced introduction to the physics and formalism of the standard model and other non-abelian gau