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Flow Of Phi Mesons In Proton Lead Collisions At The Large Hadron Collider With The Compact Muon Solenoid Detector
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Book Synopsis Search for New Physics in All-hadronic Events with the Compact Muon Solenoid Experiment at the Large Hadron Collider by : Pawandeep Singh Jandir
Download or read book Search for New Physics in All-hadronic Events with the Compact Muon Solenoid Experiment at the Large Hadron Collider written by Pawandeep Singh Jandir and published by . This book was released on 2016 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, a search for New Physics is presented in proton-proton collisions at √s = 13 TeV. This collision data was collected by the Compact Muon Solenoid detector at the CERN Large Hadron Collider located in Geneva, Switzerland in 2015 and corresponds to an integrated luminosity of 2.3 fb[superscript -1]. The search analyzes events with zero leptons and large hadronic activity. The data is divided into search regions of jet multiplicity, bottom quark tagged jet multiplicity, missing transverse momentum, and scalar sum of jet transverse momenta. The observed event count in the search regions are found to be in agreement within the standard model expectation. Thus, the results are interpreted in the context of simplified supersymmetric models of gluino pair production leading to a significant improvement in the exclusion limits on the possible mass of the gluino and neutralino.
Book Synopsis Optimization of Muon Timing and Searches for Heavy Long-lived Charged Particles with the Compact Muon Solenoid Detector at the Large Hadron Collider by : Christopher Patrick Farrell
Download or read book Optimization of Muon Timing and Searches for Heavy Long-lived Charged Particles with the Compact Muon Solenoid Detector at the Large Hadron Collider written by Christopher Patrick Farrell and published by . This book was released on 2013 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton-proton collisions at the Large Hadron Collider at sqrt(s) = 7 and 8 TeV are studied using the Compact Muon Solenoid (CMS) detector. The measurement and improvements to the arrival time of particles to the muon system of CMS are detailed. The timing is used to associate the particle with the correct proton-proton crossing and to classify the particle. Additionally, four analyses are presented that use timing and ionization energy loss to search for the production of long-lived charged particles predicted in many theories of new physics. The searches are sensitive to a variety of signatures, including the possibility that the particles will only be detectable during part of their passage through the CMS detector. Limits are placed on the production of long-lived gluinos, stops, staus, and multiply-charged particles. The limits are the most stringent in the world to date.
Book Synopsis Flow of [phi] Mesons in Proton-lead Collisions at the Large Hadron Collider with the Compact Muon Solenoid Detector by : Mukund Madhav Varma
Download or read book Flow of [phi] Mesons in Proton-lead Collisions at the Large Hadron Collider with the Compact Muon Solenoid Detector written by Mukund Madhav Varma and published by . This book was released on 2015 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of two-particle angular correlations between unidentified charged particles and [phi]-mesons are shown over a wide pseudorapidity range ([delta] [eta] 2) in pPb collisions. The data, collected during 2013 pPb run at a nucleon-nucleon center-ofmass energy of 5.02 TeV with the CMS detector, corresponds to a total integrated luminosity of aproximately 35nb-1. [Phi]-mesons are reconstructed via their hadronic decay channel, [phi] -- K+K-, for high multiplicity events. The observed two-particle long range correlations are quantified by the second-order Fourier coefficients (v2) as a function of transverse momentum. The v2 of [phi]-mesons is compared to that of other identified particles, to study the mass ordering and quark number scaling effects in measurements of elliptic flow.
Book Synopsis Strange and Non-Strange D-meson Production in pp, p-Pb, and Pb-Pb Collisions with ALICE at the LHC by : Fabrizio Grosa
Download or read book Strange and Non-Strange D-meson Production in pp, p-Pb, and Pb-Pb Collisions with ALICE at the LHC written by Fabrizio Grosa and published by Springer Nature. This book was released on 2021-04-17 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis provides a comprehensive view of the physics of charmed hadrons in high-energy proton-proton and heavy-ion collisions. Given their large masses, charm quarks are produced in the early stage of a heavy-ion collision and they subsequently experience the full system evolution probing the colour-deconfined medium called quark-gluon plasma (QGP) created in such collisions. In this thesis, the mechanisms of charm-quark in-medium energy loss and hadronisation are discussed via the measurements of the production of charm mesons with (Ds+) and without (D+) strange-quark content in different colliding systems, using data collected by the ALICE experiment at the CERN LHC. The participation of the charm quark and its possible thermalisation in the QGP are studied via measurements of azimuthal anisotropies in the production of D+ mesons. Finally, the prospects for future measurements with the upgraded ALICE experimental apparatus and with more refined machine learning techniques are presented.
Book Synopsis Mesons Produced in Proton-proton Collisions by : Vincent Zetterberg Peterson
Download or read book Mesons Produced in Proton-proton Collisions written by Vincent Zetterberg Peterson and published by . This book was released on 1950 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Study of the Z Boson Transverse Momentum Spectrum Recorded by the Compact Muon Solenoid from 2010 Large Hadron Collider Data by : Joseph A. Gartner
Download or read book The Study of the Z Boson Transverse Momentum Spectrum Recorded by the Compact Muon Solenoid from 2010 Large Hadron Collider Data written by Joseph A. Gartner and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: This dissertation describes the full details of 2 studies of Z0 bosons performed using the Compact Muon Solenoid detector at the Large Hadron Collider of proton on proton collisions with center of mass energy of 7TeV. The first study searches for physics beyond the Standard Model by looking for an excess in production of Z0 bosons by examining the Z0pT spectrum. As no excess is found, limits on new physics models are presented as a function of mass and other free parameters. The second study focuses on a precision measurement of the Z0pT distribution, and is compared to theoretical calculations for the purposes of testing high order QCD calculations in addition to probing the predictions of various tunes of the underlying event.
Book Synopsis Measuring Physical Properties of the W Boson in 7 TeV Proton-proton Collisions by : Phillip Killewald
Download or read book Measuring Physical Properties of the W Boson in 7 TeV Proton-proton Collisions written by Phillip Killewald and published by . This book was released on 2010 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The Large Hadron Collider (LHC) is a recently-activated proton-proton collider operating at a center-of-mass energy of 7 TeV. The Compact Muon Solenoid (CMS) is one of two general-purpose collider-detectors centered at one of the interaction points of the LHC. A measurement of the PW boson production cross-section and mass is presented to test the performance of the CMS detector in early (70 nb^-1) LHC data and to test theoretical predictions at this never-before-experienced energy regime. The cross-section measurement uses standard event counting techniques, while the mass measurement is performed using fitting of the analytical differential cross-section formula to the transverse mass spectrum from selected W to muon and muon neutrino events. The W production cross-section is measured to be [9,013 +/- 540 (stat.) +/- 552 (sys.) +/- 991 (lumi.)] pb, consistent with theoretical predictions at next-to-leading order in the strong coupling constant. The mass of the W is measured to be [80.07 +/- 0.64 (stat.) +/- 0.48 (sys.)] GeV/c^2, consistent with previous experimental measurements.
Book Synopsis Searches for Dijet Resonances by : Lydia Audrey Beresford
Download or read book Searches for Dijet Resonances written by Lydia Audrey Beresford and published by Springer. This book was released on 2018-09-04 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Hadron Collider Physics 2002 by : Martin Erdmann
Download or read book Hadron Collider Physics 2002 written by Martin Erdmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hadron colliders probe physics at new energy frontiers and search for new particles and forces. In addition, hadron colliders now provide also an environment for precision physics. The present volume collects the results from recently completed runs at major colliders as well as new ideas about collider physics and techniques. It will serve as the main source of reference in the field for many years to come.
Book Synopsis Performance and Calibrations of the Compact Muon Solenoid Muon System and a Search for Sphalerons at the Large Hadron Collider by : Cameron Bravo
Download or read book Performance and Calibrations of the Compact Muon Solenoid Muon System and a Search for Sphalerons at the Large Hadron Collider written by Cameron Bravo and published by . This book was released on 2018 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis first presents a detailed study of the Compact Muon Solenoid (CMS) Cathode Strip Chamber track stubs used to build muon tracks in the first layer of filtering, done in hardware, of the data. We study the spatial and angular resolutions of the track stubs with respect to the reconstructed hits using the full granularity data. We then move to a general description of a new technology, Gas Electron Multipliers (GEM), which is to be used in a near-future upgrade to the system. The characterization and calibration of the front-end electronics of the GEMs is discussed in detail. It is demonstrated that the noise of the electronics is sufficiently low to allow high efficiency operation of the technology with the first prototype GEM detector for the new subsystem. We then discuss the phenomenology of sphaleron-induced transition in proton-proton collisions. A new Monte Carlo generator is built to study this phenomenology in detail. We then perform a search analysis of the $35.9~\text{fb}^{-1}$ of data collected by the CMS detector in 2016. We set the first experimental upper limit on sphaleron production in proton-proton collisions.
Book Synopsis Study of Double Parton Scattering in Photon + 3 Jets Final State by : You-Hao Chang
Download or read book Study of Double Parton Scattering in Photon + 3 Jets Final State written by You-Hao Chang and published by Springer. This book was released on 2018-07-14 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book mainly focuses on the study of photon + 3 jets final state in Proton-Proton Collisions at √s = 7TeV, searching for patterns of two (or more) distinct hard scatterings in the same collision, i.e the so-called Double Parton Scattering (DPS). A new method by using Monte Carlo generators was performed and provides higher order corrections to the description of the Single Parton Scattering (SPS) background. Further it is investigated whether additional contributions from DPS can improve the agreement between the measured data and the Monte Carlo predictions. The current theoretical uncertainties related to the SPS background are found to be larger than expectation. At the same time a rich set of DPS-sensitive measurements is reported for possible further interpretation.
Book Synopsis The Yield of Neutral Mesons from Proton Bombardment of Hydrogen and Deuterium by : Norman Knable
Download or read book The Yield of Neutral Mesons from Proton Bombardment of Hydrogen and Deuterium written by Norman Knable and published by . This book was released on 1951 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phi Meson Production in P+p Collisions at 200 GeV Measured by the PHENIX Experiment at the Relativistic Heavy Ion Collider by : Dmitri Vladimirovitch Kotchetkov
Download or read book Phi Meson Production in P+p Collisions at 200 GeV Measured by the PHENIX Experiment at the Relativistic Heavy Ion Collider written by Dmitri Vladimirovitch Kotchetkov and published by . This book was released on 2005 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Hadronic Event Shapes and Jet Substructure in Proton-proton Collisions at 7.0 TeV Center-of-mass Energy with the ATLAS Detector at the Large Hadron Collider by : David Wilkins Miller
Download or read book Measurement of Hadronic Event Shapes and Jet Substructure in Proton-proton Collisions at 7.0 TeV Center-of-mass Energy with the ATLAS Detector at the Large Hadron Collider written by David Wilkins Miller and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the first measurement of 6 hadronic event shapes in proton-proton collisions at a center-of-mass energy of 7.0 TeV using the ATLAS detector at the Large Hadron Collider. Results are presented at the particle-level, permitting comparisons to multiple Monte Carlo event generator tools. Numerous tools and techniques that enable detailed analysis of the hadronic final state at high luminosity are described. The approaches presented utilize the dual strengths of the ATLAS calorimeter and tracking systems to provide high resolution and robust measurements of the hadronic jets that constitute both a background and a signal throughout ATLAS physics analyses. The study of the hadronic final state is then extended to jet substructure, where the energy flow and topology within individual jets is studied at the detector level and techniques for estimating systematic uncertainties for such measurements are commissioned in the first data. These first substructure measurements in ATLAS include the jet mass and sub-jet multiplicity as well as those concerned with multi-body hadronic decays and color flow within jets. Finally, the first boosted hadronic object observed at the LHC -- the decay of the top quark to a single jet -- is presented.
Book Synopsis The Large Hadron Collider by : Lyndon Evans
Download or read book The Large Hadron Collider written by Lyndon Evans and published by Epfl Press. This book was released on 2009-08-14 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Large Hadron Collider, one of the greatest scientific marvels of the 21st century, is described in this informative book. Written by the head scientists involved, the book places its construction into the context of its scientific goals and principles. Pub 8/09.
Book Synopsis Measurement of [phi] Meson Production in Cu+Cu Collisions at 200 GeV Using the PHOBOS Detector at RHIC by : Siarhei S. Vaurynovich
Download or read book Measurement of [phi] Meson Production in Cu+Cu Collisions at 200 GeV Using the PHOBOS Detector at RHIC written by Siarhei S. Vaurynovich and published by . This book was released on 2012 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strong enhancement of production of strange particles, and in particular of [phi] mesons, in heavy ion collisions of sufficiently high energies has been predicted to be an indication of a formation of a new state of matter, composed of deconfined quarks and gluons and having a property of chiral symmetry, called Quark Gluon Plasma (QGP). Studying production of [phi] mesons is of special interest due to their small cross-section of interaction with non-strange hadrons and due to their long lifetime, which should allow [phi] mesons to decouple from the strongly interacting medium produced in heavy ion collisions early in time and to escape the medium before decaying, thereby preserving information about the conditions in which the mesons were produced. In addition, the decay properties of [phi] mesons have been predicted to be modified in a hadronic gas medium. The [phi] -> K+K~ decay is of particular interest since the mass of a [phi] meson in vacuum is very close to the mass of two charged kaons, and consequently, even a small change in the mass or the width of [phi] mesons or in the mass of kaons would have a strong effect on the decay properties. Measurement of [phi] meson production using the PHOBOS detector at the Relativistic Heavy Ion Collider (RHIC) has proven to be especially challenging due to a small acceptance of the PHOBOS spectrometer and due to a much lower than predicted yield of [phi] mesons in heavy ion collisions at the highest RHIC energy. The measurement required a development of a new tracking algorithm, specifically tailored to reconstruct charged kaons with a high efficiency in a high hit density environment, keeping at the same time the necessary computing time within feasible limits. Results of a measurement of [phi] meson invariant yield in the rapidity interval 0 y
Book Synopsis Measurement of Hadronic Event Shapes and Jet Substructure in Proton-Proton Collisions at 7.0 TeV Center-of-Mass Energy with the ATLAS Detector at the Large Hadron Collider by :
Download or read book Measurement of Hadronic Event Shapes and Jet Substructure in Proton-Proton Collisions at 7.0 TeV Center-of-Mass Energy with the ATLAS Detector at the Large Hadron Collider written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the first measurement of 6 hadronic event shapes in proton-proton collisions at a center-of-mass energy of √s = 7 TeV using the ATLAS detector at the Large Hadron Collider. Results are presented at the particle-level, permitting comparisons to multiple Monte Carlo event generator tools. Numerous tools and techniques that enable detailed analysis of the hadronic final state at high luminosity are described. The approaches presented utilize the dual strengths of the ATLAS calorimeter and tracking systems to provide high resolution and robust measurements of the hadronic jets that constitute both a background and a signal throughout ATLAS physics analyses. The study of the hadronic final state is then extended to jet substructure, where the energy flow and topology within individual jets is studied at the detector level and techniques for estimating systematic uncertainties for such measurements are commissioned in the first data. These first substructure measurements in ATLAS include the jet mass and sub-jet multiplicity as well as those concerned with multi-body hadronic decays and color flow within jets. Finally, the first boosted hadronic object observed at the LHC - the decay of the top quark to a single jet - is presented.
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