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Author: Wen-Teng Chu Publisher: ISBN: Category : Languages : en Pages : 84
Book Description
XENON1T collaboration has reported an excess of electron recoil events last year over the background in the recoil energy in a range 1-7 keV, peaked around 2.4 keV. We apply the one-loop radiative seesaw model which was proposed by E.Ma in 2006 to provide an explanation for the XENON1T anomaly. The model consists two limits that lead to two different dark matter candidates, namely scalar particle e0 and right-handed neutrino Nk respectively, depending on their mass scales. We confirm that one of two limits can be simultaneously reconcile the XENON1T anomaly and the tiny neutrino masses with the feasible Yukawa coupling constant. Furthermore, the other parameters are also in the allowed region by experimental limitations.
Author: Wen-Teng Chu Publisher: ISBN: Category : Languages : en Pages : 84
Book Description
XENON1T collaboration has reported an excess of electron recoil events last year over the background in the recoil energy in a range 1-7 keV, peaked around 2.4 keV. We apply the one-loop radiative seesaw model which was proposed by E.Ma in 2006 to provide an explanation for the XENON1T anomaly. The model consists two limits that lead to two different dark matter candidates, namely scalar particle e0 and right-handed neutrino Nk respectively, depending on their mass scales. We confirm that one of two limits can be simultaneously reconcile the XENON1T anomaly and the tiny neutrino masses with the feasible Yukawa coupling constant. Furthermore, the other parameters are also in the allowed region by experimental limitations.
Author: Ting-hsien Chen Publisher: ISBN: Category : Languages : en Pages : 100
Book Description
Inside the nucleus, there are protons and neutrons and they form the bound states. When neutron leave the nucleus, it will become an unstable particle which is called a free neutron. The free neutron lifetime is predicted to be 881.5±1.5 s by the Standard Model. For years the experimental measurement are basically consistent with the theoretical results. However, recently laboratories in USA (Beam experiment) and France (Bottle experiment) were shown that the neutron lifetime anomaly, namely a discrepancy of about 1% is found between the experimental measurements and the theoretical prediction. Regarding the neutron lifetime anomaly. We propose an new gauge U(1) symmetry portal to dark matter to resolve the neutron lifetime anomaly. The symmetry breaking pattern of this new gauge symmetry will also shed light on the neutrino mass generation through the quantum radioactive corrections.
Author: R Shrock Publisher: World Scientific ISBN: 9814485438 Category : Science Languages : en Pages : 425
Book Description
This important book presents the proceedings of the conference “Neutrinos and Implications for Physics Beyond the Standard Model”, put on by the Yang Institute for Theoretical Physics, State University of New York at Stony Brook.The observation of neutrino masses and lepton mixing constitutes the first confirmed evidence for physics beyond the Standard Model. This evidence includes the measured deficiency of charged current reactions induced by solar neutrinos and the anomalous zenith angle distribution of atmospheric neutrinos. A profound question now facing theorists is: What do these observations imply for new physics? At the conference, members of the major experiments gave an update on current experimental evidence from solar and atmospheric neutrino data for neutrino oscillations, and status reports from KamLAND and MiniBooNE. Leading theorists also reported on neutrinoless double beta decay, high energy neutrino scattering and precision electroweak data, theoretical models for neutrino masses and lepton mixing, and constraints from neutrino data, etc. Since neutrino physics is at present one of the most exciting areas of particle physics, this volume should be of interest to a wide variety of students and researchers in physics.
Author: Nicolò Foppiani Publisher: Springer Nature ISBN: 3031408330 Category : Science Languages : en Pages : 226
Book Description
This thesis, encompassing both theory to experiment, guides the reader in a pedagogical way through the author’s attempts to resolve the mystery of the so-called MiniBooNE anomaly, where unexpected neutrino oscillations were reported, potentially explainable by the existence of light sterile neutrinos, but in contradiction with several null results. Within this context, this thesis reports one of the first analyses searching for an excess of electrons in the MicroBooNE experiment finding no excess of events and narrowing down the possible explanations for the anomaly. Additionally, this thesis explores non-minimal heavy neutral leptons as potential explanations for the MiniBooNE excess. To search for evidence for this particle, the author performs an analysis using data from the T2K experiment, which searched for pairs of electrons using a gas argon time projection. This thesis provides a comprehensive explanation of the MiniBooNE anomaly and test of its possibile explanation with liquid and gas time projection chambers.
Author: Hong-yu Chou Publisher: ISBN: Category : Languages : en Pages : 122
Book Description
Neutrino oscillation has been confirmed as the resolution to the long-standing solar neutrino problem. The key is the so-called Mikheev-Smirnov-Wolfenstein effect which takes into account the interaction between neutrinos and matter during the propagation. The resonant transition probability among neutrino depends on parameters such as the number density of electrons, neutrino energies, and mass differences of neutrinos (refers to neutrino mass eigenstates). It was found the solar environment with the aid of mixing angle determination, the sign of can is confirmed. However, ambiguity remains for the ordering of 3-1 mass-squared difference. In this project, we study the mass hierarchy (MH) problem by utilizing the matter effect of atmospheric neutrinos which pass through the core of Earth. We discuss the generic theoretical approach and then compare it with the collecting data from IceCube. The systematic, as well as statistical errors to pin down the MH, are investigated.
Author: Fred Jegerlehner Publisher: Springer Science & Business Media ISBN: 3540726330 Category : Science Languages : en Pages : 433
Book Description
This book reviews the present state of knowledge of the anomalous magnetic moment a=(g-2)/2 of the muon. The muon anomalous magnetic moment is one of the most precisely measured quantities in elementary particle physics and provides one of the most stringent tests of relativistic quantum field theory as a fundamental theoretical framework. It allows for an extremely precise check of the standard model of elementary particles and of its limitations.
Author: Guido Altarelli Publisher: Springer ISBN: 3540449019 Category : Science Languages : en Pages : 0
Book Description
Reviews the current state of knowledge of neutrino masses and the related question of neutrino oscillations. After an overview of the theory of neutrino masses and mixings, detailed accounts are given of the laboratory limits on neutrino masses, astrophysical and cosmological constraints on those masses, experimental results on neutrino oscillations, the theoretical interpretation of those results, and theoretical models of neutrino masses and mixings. The book concludes with an examination of the potential of long-baseline experiments. This is an essential reference text for workers in elementary-particle physics, nuclear physics, and astrophysics.
Author: Ethan Siegel Publisher: Voyageur Press ISBN: 0760361754 Category : Science Languages : en Pages : 219
Book Description
Be amazed by 25 iconic pieces of tech from the Star Trek canon and the science behind how they function with Treknology. You will not believe how close we are to achieving some of them today. The name Star Trek conjures images of faster-than-light spacecraft, holographic crew members, and phasers set to stun. Some of these incredible devices may still be far from our reach, but others have made the leap from science fiction to science fact—and now you can learn the science and engineering of what makes them tick. Treknology looks at over twenty-five iconic inventions from the complete history of the Star Trek television and film universe. Author Ethan Siegel explores and profiles these dazzling technologies and their role Star Trek, the science behind how they work, and how close we are to achieving them in the real world today. This stunning collection is packed with 150 superbfilm and television stills, prop photography, and scientific diagrams to pull you into another world. Brace yourself for a detailed look at the inner workings of Star Trek’s computing capabilities, communications equipment, medical devices, and awe-inspiring ships. Treknology is one that no fan of Star Trek, or future tech, will want to miss.
Author: Wen-Teng Chu
Author: Wen-Teng Chu
Author: Ting-hsien Chen
Author: R Shrock
Author: Nicolò Foppiani
Author: Hong-yu Chou
Author: 
Author: J. Thanh Van Tran
Author: Fred Jegerlehner
Author: Guido Altarelli
Author: Ethan Siegel