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Search for New Physics in Pp Collisions at 7 TeV Center-of-mass Energy Using Diphoton Events with Large Missing Transverse Energy in the CMS Experiment at the LHC

2011 Gauge fields (Physics)
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Release : 2011
Genre : Gauge fields (Physics)
Kind : eBook
Book Rating : 816/5 ( reviews)

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Book Synopsis Search for New Physics in Pp Collisions at 7 TeV Center-of-mass Energy Using Diphoton Events with Large Missing Transverse Energy in the CMS Experiment at the LHC by : Robert Wayne Stringer

Download or read book Search for New Physics in Pp Collisions at 7 TeV Center-of-mass Energy Using Diphoton Events with Large Missing Transverse Energy in the CMS Experiment at the LHC written by Robert Wayne Stringer. This book was released on 2011. Available in PDF, EPUB and Kindle. Book excerpt: Many theoretical models of physics beyond the Standard Model provide a signature of two photons and large missing transverse energy [Special characters omitted.] in the final state. This search was performed using 36 pb[superscript -1] of proton-proton collision data at [Squared root of s] = 7 TeV. The candidate events are determined by comparing the [Special characters omitted.] distribution for events with two photons and at least one hadronic jet with the [Special characters omitted.] T distribution from QCD and electroweak processes that have no true missing transverse energy. 1.2 ± 0.8 background events were expected, with one event observed. This result was interpreted in two theoretical models beyond the Standard Model. The cross section for General Gauge Mediated Supersymmetry Breaking is given an upper limit between 0.3 pb and 1.1 pb. Universal Extra Dimensions has been excluded for all values of 1/ R

Search for New Physics with Long-lived Particles Decaying to Photons and Missing Energy in Pp Collisions at a Center-of-mass Energy of 7 TeV with the CMS Experiment at the LHC

2011 Gauge invariance
Download Search for New Physics with Long-lived Particles Decaying to Photons and Missing Energy in Pp Collisions at a Center-of-mass Energy of 7 TeV with the CMS Experiment at the LHC PDF Online Free

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Release : 2011
Genre : Gauge invariance
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Book Synopsis Search for New Physics with Long-lived Particles Decaying to Photons and Missing Energy in Pp Collisions at a Center-of-mass Energy of 7 TeV with the CMS Experiment at the LHC by : Hongliang Liu

Download or read book Search for New Physics with Long-lived Particles Decaying to Photons and Missing Energy in Pp Collisions at a Center-of-mass Energy of 7 TeV with the CMS Experiment at the LHC written by Hongliang Liu. This book was released on 2011. Available in PDF, EPUB and Kindle. Book excerpt: We perform a search for long-lived neutral particles decaying into a photon and invisible particles in pp collisions at a center-of-mass energy of 7 TeV at the Large Hadron Collider. In the context of gauge mediated supersymmetry with the lightest neutralino as the next-to-lightest supersymmetric particle and the gravitino as the lightest supersymmetric particle, the neutralino can decay into a gravitino and a photon with a non-zero lifetime. The impact parameter of the photon relative to the beam-beam collision point can be reconstructed using converted photons. The method is sensitive to lifetimes of the order of [Special characters omitted.] (0.1 ns). The data sample corresponds to an integrated luminosity of 2.1 ± 0.1 fb -1 recorded in the first part of 2011 by the CMS experiment at the LHC at [Special characters omitted.] = 7 TeV. The search is performed using events containing photons, missing transverse energy and jets. Upper limits at the 95% confidence level are presented on the cross section for such particles from pair-production, each of which decays into a photon and invisible particles.

Lepton Photon Interactions At High Energies (Lepton Photon 2017) - Proceedings Of The 28th International Symposium

2020-02-27 Science
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Release : 2020-02-27
Genre : Science
Kind : eBook
Book Rating : 410/5 ( reviews)

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Book Synopsis Lepton Photon Interactions At High Energies (Lepton Photon 2017) - Proceedings Of The 28th International Symposium by : Wang Wei

Download or read book Lepton Photon Interactions At High Energies (Lepton Photon 2017) - Proceedings Of The 28th International Symposium written by Wang Wei. This book was released on 2020-02-27. Available in PDF, EPUB and Kindle. Book excerpt: The latest of the 'Lepton Photon' symposium, one of the well-established series of meetings in the high-energy physics community, was successfully organized at the South Campus of Sun Yat-sen University, Guangzhou, China, from August 7-12, 2017, where physicists around the world gathered to discuss the latest advancements in the research field.This proceedings volume of the Lepton Photon 2017 collects contributions by the plenary session speakers and the posters' presenters, which cover the latest results in particle physics, nuclear physics, astrophysics, cosmology, and plans for future facilities.

Measurement of the T T-bar Production Cross Section in Pp Collisions at 7 TeV in Lepton + Jets Events Using B-quark Jet Identification

2011
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Release : 2011
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Book Synopsis Measurement of the T T-bar Production Cross Section in Pp Collisions at 7 TeV in Lepton + Jets Events Using B-quark Jet Identification by :

Download or read book Measurement of the T T-bar Production Cross Section in Pp Collisions at 7 TeV in Lepton + Jets Events Using B-quark Jet Identification written by . This book was released on 2011. Available in PDF, EPUB and Kindle. Book excerpt: A new measurement of the inclusive production cross section for pp to t t-bar is performed at a center-of-mass energy of 7 TeV using data collected by the CMS experiment at the LHC. The analysis uses a data sample corresponding to an integrated luminosity of 36 inverse picobarns, and is based on the final state with one isolated, high transverse momentum muon or electron, missing transverse energy, and hadronic jets. The ttbar content of the selected events is enhanced by requiring the presence of at least one jet consistent with b-quark hadronization. The measured cross section is 150 +/- 9 (stat.) +/- 17 syst.) +/- 6 (lumi.) pb and is in agreement with higher-order QCD calculations. The combination of this measurement with a previous CMS result based on dileptons gives 154 +/- 17 (stat.+syst.) +/- 6 (lumi.) pb.

Search for Diphoton Events with Large Missing Transverse Energy in 7 TeV Proton-Proton Collisions with the ATLAS Detector

2013
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Release : 2013
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Book Synopsis Search for Diphoton Events with Large Missing Transverse Energy in 7 TeV Proton-Proton Collisions with the ATLAS Detector by :

Download or read book Search for Diphoton Events with Large Missing Transverse Energy in 7 TeV Proton-Proton Collisions with the ATLAS Detector written by . This book was released on 2013. Available in PDF, EPUB and Kindle. Book excerpt:

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