Author: Steven C. CorbatoPublisher:
ISBN:
Category :
Languages : en
Pages : 346
Book Description
Search for Anisotropies in the Underground Cosmic Ray Muon Flux
Author: Steven C. CorbatoProbing Cosmic Ray Anisotropy with Atmospheric Neutrinos
Author: Elizabeth J. WillsPublisher:
ISBN:
Category : Anisotropy
Languages : en
Pages : 181
Book Description
In the hundred years that have followed the discovery of cosmic rays, more about them remains unknown than known. Many concerted efforts are currently underway to detect cosmic rays using a variety of detection methods in space, on the surface of Earth, and deep underground. Of the many remaining mysteries, the one addressed in this work is the anisotropy in arrival directions of the cosmic rays incident on the atmosphere. This behaviour has been observed in both hemispheres of the planet, at high significance, from 1 TeV - 1 EeV energy ranges, at angular scales from 5 degrees to 180 degrees, and displays no time variation. It is measured consistently as a 0.1% over- and under-fluctuation. This work presents the first neutrino analysis of cosmic ray arrival directions so far, specifically, in the northern hemisphere. The analysis is done with an atmospheric neutrino dataset which was specifically designed for this analysis and composed of neutrinos detected by the IceCube South Pole Neutrino Observatory from 2011-2016. The goal of the search was to detect cosmic ray anisotropy as observed in atmospheric muons, but this time, in atmospheric neutrinos. To this end, a new atmospheric neutrino dataset was created using machine learning, aiming to increase data acceptance rates by optimizing sacrifices in purity and angular acceptance. The standard analysis techniques were carried out, along with a new log-likelihood method developed to improve sensitivity in a lower-statistics realm. While no signal was detected in this analysis, the analysis methodology has been developed and tested. We project that with a total of twelve years of IceCube data will be required to be sensitive to a dipole anisotropy at the level previously reported by the Tibet-AS[gamma] Collaboration. Detection of cosmic ray anisotropy in the neutrino channel would allow for verification of known cosmic ray shower physics, and particle propagation. The neutrinos could allow us to probe the anisotropy in a new way. If the signal deviates, there could be new physics to discover. The method and data selection are developed, and in several years, new developments will be made towards unraveling the mystery of cosmic ray anisotropy with neutrinos.
Nuclear Science Abstracts
Author: Scientific and Technical Aerospace Reports
Author: TAUP 91
Author: A. MoralesPublisher: Elsevier
ISBN: 1483257142
Category : Science
Languages : en
Pages : 539
Book Description
TAUP 91 covers the proceedings of the Second International Workshop on Theoretical and Phenomenological Aspects of Underground Physics, held in Toledo, Spain on September 9-13, 1991. The book focuses on the processes, methodologies, reactions, and transformations involved in underground physics. The selection first offers information on the fundamental issues in particle astrophysics and an overview of the problems related to general cosmology. Topics include connections between particle physics, astrophysics, and cosmology, stellar physics and particles, astrophysical ages, cosmic background radiation, and abundances of light elements. The text also takes a look at big bang nucleosynthesis constraints on new physics and microwave background radiation. The publication ponders on very wide band interferometric gravitational wave antenna and search for stellar gravitational collapse by macro. The text also examines high energy cosmic neutrinos of acceleration and non-acceleration origin; tests of general relativity and Newtonian gravity at large distances and the dark matter problem; and nuclear form factors for the scattering of neutralinos. The selection is a valuable reference for readers interested in underground physics.
Proceedings - International Conference on Cosmic Rays
Author: Binary Stars, Neutrinos, and Liquid Crystals:
Author: Paul A. HeineyPublisher: Xlibris Corporation
ISBN: 1669851575
Category : Science
Languages : en
Pages : 390
Book Description
This book traces the parallel paths of physics and astronomy at the University of Pennsylvania, starting with their genesis in the 18th century, through the rising stature of both departments in the 20th century, and concluding with their unification in 1994. Along the way we meet David Rittenhouse, who observed the transit of Venus in 1769, Charles Doolittle, whose remarkable beard would freeze to his telescope on cold nights, Gaylord Harnwell, who transformed first the physics department and then the entire university, and Raymond Davis, who uncovered a mystery in the middle of the sun. The stories are tragic (Arthur Goodspeed failed to discover X-rays through inattention), horrifying (Dicran Kabakjian poisoned an entire neighborhood), and celebratory (three Penn physicists received the Nobel Prize in the late 20th Century). The reader will gain an appreciation, not just of the history of one institution, but of the ways these two disciplines both intersect and complement each other.
Contributed Papers
Author: Proceedings of the Moscow Cosmic Ray Conference
Author: Search For New Elementary Particles, The: Status And Prospect - Proceedings Of The Trieste Workshop
Author: Martin Lewis PerlPublisher: World Scientific
ISBN: 9814553662
Category :
Languages : en
Pages : 315
Book Description
It has been more than a decade since new elementary particles were discovered. To recognize the findings of scientists in this still fairly new but exciting and promising area of research, the Trieste Workshop was organised in May 1992 to discuss the status and explore the prospects for the discovery of new elementary particles using the full variety of search methods which are, or will be available to the physicist. All papers in this collection of proceedings are reviews written by experts in their own area of speciality. Many review papers based on experimental findings are also included. To present a clearer and more coherent overview, a theoretical overview talk as well as a summary talk have been included to serve as a link between the various areas that were discussed in the papers. This collection of papers is perhaps the first authoritative source ever published on the search for new elementary particles.