Search For Microscopic Black Hole Signatures At The Large Hadron Collider
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Search For Microscopic Black Hole Signatures At The Large Hadron Collider
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Author :
language : en
Publisher:
Release Date : 2011
Search For Microscopic Black Hole Signatures At The Large Hadron Collider written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A search for microscopic black hole production and decay in proton-proton collisions at a center-of-mass energy of 7 TeV has been conducted using Compact Muon Solenoid (CMS) detector at the CERN Large Hadron Collider. A total integrated luminosity of 35 pb-1 data sample, taken by CMS Collaboration in year 2010, has been analyzed. A novel background estimation for multi-jet events beyond TeV scale has been developed. A good agreement with standard model backgrounds, dominated by multi-jet production, is observed for various final-state multiplicities. Using semi-classical approximation, upper limits on minimum black hole mass at 95% confidence level are set in the range of 3.5 - 4.5 TeV for values of the Planck scale up to 3 TeV. Model-independent limits are provided to further constrain microscopic black hole models with additional regions of parameter space, as well as new physics models with multiple energetic final states. These are the first limits on microscopic black hole production at a particle accelerator.
Einstein S Monsters The Life And Times Of Black Holes
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Author : Chris Impey
language : en
Publisher: W. W. Norton & Company
Release Date : 2018-11-13
Einstein S Monsters The Life And Times Of Black Holes written by Chris Impey and has been published by W. W. Norton & Company this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-13 with Science categories.
The astonishing science of black holes and their role in understanding the history and future of our universe. Black holes are the most extreme objects in the universe, and yet they are ubiquitous. Every massive star leaves behind a black hole when it dies, and every galaxy harbors a supermassive black hole at its center. Frighteningly enigmatic, these dark giants continue to astound even the scientists who spend their careers studying them. Which came first, the galaxy or its central black hole? What happens if you travel into one—instant death or something weirder? And, perhaps most important, how can we ever know anything for sure about black holes when they destroy information by their very nature? In Einstein’s Monsters, distinguished astronomer Chris Impey takes readers on an exploration of these and other questions at the cutting edge of astrophysics, as well as the history of black holes’ role in theoretical physics—from confirming Einstein’s equations for general relativity to testing string theory. He blends this history with a poignant account of the phenomena scientists have witnessed while observing black holes: stars swarming like bees around the center of our galaxy; black holes performing gravitational waltzes with visible stars; the cymbal clash of two black holes colliding, releasing ripples in space-time. Clear, compelling, and profound, Einstein’s Monsters reveals how our comprehension of black holes is intrinsically linked to how we make sense of the universe and our place within it. From the small questions to the big ones—from the tiniest particles to the nature of space-time itself—black holes might be the key to a deeper understanding of the cosmos.
Nauscentrism Answers To The Mystery Questions Of Life
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Author : Mark McDowell
language : en
Publisher: Fulton Books, Inc.
Release Date : 2017-10-17
Nauscentrism Answers To The Mystery Questions Of Life written by Mark McDowell and has been published by Fulton Books, Inc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-17 with Philosophy categories.
How did we get here, and why are we here? Enjoy an enthralling journey into logic, religion, physics, and philosophy for an overarching examination of the contingency of life from a purely objective and logical perspective. In the quest for answers to the age-old questions about life, an afterlife, and the universe, learn of considerations that make some theories just not work and how the most important consideration has been left out one's personal existence. Neither the universe created
Signatures For Black Hole Production From Hadronic Observables At The Large Hadron Collider
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Author : Thomas J. Humanic
language : en
Publisher:
Release Date : 2006
Signatures For Black Hole Production From Hadronic Observables At The Large Hadron Collider written by Thomas J. Humanic and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Generalized Uncertainty Relations Existing Paradigms And New Approaches
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Author : Shi-Dong Liang
language : en
Publisher: Frontiers Media SA
Release Date : 2023-09-26
Generalized Uncertainty Relations Existing Paradigms And New Approaches written by Shi-Dong Liang and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-09-26 with Science categories.
Quantum Gravity
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Author : Claus Kiefer
language : en
Publisher: OUP Oxford
Release Date : 2012-04-05
Quantum Gravity written by Claus Kiefer and has been published by OUP Oxford this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-04-05 with Science categories.
The search for a quantum theory of the gravitational field is one of the great open problems in theoretical physics. This book presents a self-contained discussion of the concepts, methods and applications that can be expected in such a theory. The two main approaches to its construction — the direct quantisation of Einstein's general theory of relativity and string theory — are covered. Whereas the first attempts to construct a viable theory for the gravitational field alone, string theory assumes that a quantum theory of gravity will be achieved only through a unification of all the interactions. However, both employ the general method of quantization of constrained systems, which is described together with illustrative examples relevant for quantum gravity. There is a detailed presentation of the main approaches employed in quantum general relativity: path-integral quantization, the background-field method and canonical quantum gravity in the metric, connection and loop formulations. The discussion of string theory centres around its quantum-gravitational aspects and the comparison with quantum general relativity. Physical applications discussed at length include the quantization of black holes, quantum cosmology, the indications of a discrete structure of spacetime, and the origin of irreversibility. This third edition contains new chapters or sections on quantum gravity phenomenology, Horava-Lifshitz quantum gravity, analogue gravity, the holographic principle, and affine quantum gravity. It will present updates on loop quantum cosmology, the LTB model, asymptotic safety, and various discrete approaches. The third edition also contains pedagogical extensions throughout the text. This book will be of interest to researchers and students working in relativity and gravitation, cosmology, quantum field theory and related topics. It will also be of interest to mathematicians and philosophers of science.
Micro Black Holes At The Lhc
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Author : John Philip Ottersbach
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2010-06
Micro Black Holes At The Lhc written by John Philip Ottersbach and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-06 with categories.
According to certain theories of large spacial extra dimensions, the Large Hadron Collider at Cern could become a black hole factory. The colliding protons could then form micro black holes at a rate as high as 1 black hole per second. Following these theoretical predictions, this thesis gives an insight in the predicted black hole creation and their decay. The unique democratic decay of the black holes is studied and used to identify these special events in the ATLAS detector.
Search For Signatures Of Extra Dimensions In The Diphoton Mass Spectrum At The Large Hadron Collider
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Author :
language : en
Publisher:
Release Date : 2011
Search For Signatures Of Extra Dimensions In The Diphoton Mass Spectrum At The Large Hadron Collider written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A search for signatures of extra dimensions in the diphoton invariant-mass spectrum has been performed with the CMS detector at the LHC. No excess of events above the standard model expectation is observed using a data sample collected in proton-proton collisions at √s = 7 TeV corresponding to an integrated luminosity of 2.2 fb−1. In the context of the large-extra-dimensions model, lower limits are set on the effective Planck scale in the range of 2.3-3.8 TeV at the 95% confidence level. These limits are the most restrictive bounds on virtual-graviton exchange to date. The most restrictive lower limits to date are also set on the mass of the first graviton excitation in the Randall-Sundrum model in the range of 0.86-1.84 TeV, for values of the associated coupling parameter between 0.01 and 0.10.
The Search For The Dark Matter Signature In The Lepton Jet Final State At Sqrt S
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Author : Sergei V. Gleyzer
language : en
Publisher:
Release Date : 2011
The Search For The Dark Matter Signature In The Lepton Jet Final State At Sqrt S written by Sergei V. Gleyzer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
ABSTRACT: The Large Hadron Collider is pushing high energy physics in to a brand new territory. This extraordinary era may bring discoveries of unprecedented magnitude, delivering validation or extreme dissappointment to the physics theories of the previous decades. By colliding particles at more than 3.5 times the center of mass energy of the Tevatron accelerator at the Fermilab National Accelerator Laboratory, the CERN Large Hadron Collider aims to produce particles in the mass range above those that are already known. At the same time, there are exciting possibilities for new physics in the low-mass range that may have gone unnoticed until now. An example of this is a GeV-scale dark sector with a colorful spectrum of new particles. This physics model produces unique signatures of collimated leptons at the Large Hadron Collider energies. In the first part of this work, we describe the interesting astrophysical evidence that motivates a search for lepton jets and focus our attention on a minimal supersymmetric standard model with a GeV-scale dark sector that produces this exciting signature. In the next part of the thesis, we describe a search using the Compact Muon Solenoid (CMS) detector for evidence of dark matter in events containing muonic lepton-jets produced in 7 TeV proton-proton collisions at the Large Hadron Collider. We employ a novel lepton jet algorithm and find no evidence of an excess of such events with respect to the rate predicted by the Standard Model and interpret the null result in terms of a recently developed supersymmetric theory of dark matter. In doing so, we severely constrain the theoretical model and its parameters with the actual data from the Large Hadron Collider. In addition, we report the first observation of double J/Psi production, a new physical process discovery at the next energy frontier.
Searches For Dijet Resonances
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Author : Lydia Audrey Beresford
language : en
Publisher: Springer
Release Date : 2018-09-04
Searches For Dijet Resonances written by Lydia Audrey Beresford and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-04 with Science categories.
This book addresses one of the most intriguing mysteries of our universe: the nature of dark matter. The results presented here mark a significant and substantial contribution to the search for new physics, in particular for new particles that couple to dark matter. The first analysis presented is a search for heavy new particles that decay into pairs of hadronic jets (dijets). This pioneering analysis explores unprecedented dijet invariant masses, reaching nearly 7 TeV, and sets constraints on several important new physics models. The two subsequent analyses focus on the difficult low dijet mass region, down to 200 GeV, and employ a novel technique to efficiently gather low-mass dijet events. The results of these analyses transcend the long-standing constraints on dark matter mediator particles set by several existing experiments.