998 resultados para cms lhc 7TeV


Relevância:

20.00% 20.00%

Publicador:

Resumo:

Tras analizar y evaluar la argumentación jurídica efectuada por el Tribunal del CIADI respecto del caso CMS vs. Argentina, se aprecia que tal argumentación descansa sobre la errada concepción de que en el caso no existían aspectos que afecten derechos humanos. En realidad se trataba de un caso difícil, en materia de derechos sociales, que no podía ser resuelto por la simple aplicación de las reglas específicas del sistema (subsunción), como erróneamente lo hizo el Tribunal del CIADI, pues necesariamente debía acudirse al procedimiento de la ponderación. Si se acude a la ponderación se podrá constatar que existen dos principios aplicables, cada uno de los cuales lleva a una solución incompatible con la del otro: por un lado, la protección del derecho a la seguridad jurídica del inversionista extranjero, que exige un respeto a los derechos pactados contractual y legalmente, y, por otro, el de la protección al derecho a la vivienda, que exige una congelación en las tarifas de servicios básicos esenciales, entre ellos del transporte y distribución del gas. En este caso el segundo prevalece sobre el primero.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Guidance for University of Reading staff wishing to add CentAUR publication lists to CMS web pages: staff profile page; department page; standard page. Log in with University of Reading (staff) username and password when prompted.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The complete understanding of the basic constituents of hadrons and the hadronic dynamics at high energies are two of the main challenges for the theory of strong interactions. In particular, the existence of intrinsic heavy quark components in the hadron wave function must be confirmed (or disproved). In this paper we propose a new mechanism for the production of D-mesons at forward rapidities based on the Color Glass Condensate (CGC) formalism and demonstrate that the resulting transverse momentum spectra are strongly dependent on the behavior of the charm distribution at large Bjorken x. Our results show clearly that the hypothesis of intrinsic charm can be tested in pp and p(d)A collisions at RHIC and LHC. (C) 2010 Elsevier B.V. All rights reserved.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

We study the collider phenomenology of bilinear R-parity violating supergravity, the simplest effective model for supersymmetric neutrino masses accounting for the current neutrino oscillation data. At the CERN Large Hadron Collider the center-of-mass energy will be high enough to probe directly these models through the search for the superpartners of the Standard Model (SM) particles. We analyze the impact of R-parity violation on the canonical supersymmetry searches-that is, we examine how the decay of the lightest supersymmetric particle (LSP) via bilinear R-parity violating interactions degrades the average expected missing momentum of the reactions and show how this diminishes the reach in the usual channels for supersymmetry searches. However, the R-parity violating interactions lead to an enhancement of the final states containing isolated same-sign di-leptons and trileptons, compensating the reach loss in the fully inclusive channel. We show how the searches for displaced vertices associated to LSP decay substantially increase the coverage in supergravity parameter space, giving the corresponding reaches for two reference luminosities of 10 and 100 fb(-1) and compare with those of the R-parity conserving minimal supergravity model.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Arbetet behandlar säkerhetstestning av webbapplikationer och CMS plattformen EPiServer. För att Know IT Dalarna ska kunna fortsätta leverera säkra webblösningar efterfrågar de en säkerhetsanalys över plattformen EPiServer men även över sina egenutvecklade applikationer. Syftet med arbetet var att höja säkerheten kring Know ITs webbaserade projekt och samtidigt göra utvecklarna mer medvetna om säkerheten vid utvecklingsfasen. Resultatet var att EPiServer som plattformen tillhandahåller en fullgod säkerhet. De direkta brister som identifierades var upp till antingen Know IT eller kunden att åtgärda och ansvaret lades på den som hade hand om driften av webbplatsen. Säkerhetstesterna som utfördes var bland annat tester emot åtkomsthantering, avlyssningsattacker, lösenordsattacker, SQL-injections och XSS-attacker.För att förenkla säkerhetstestningen skapades en checklista innehållandes steg för steg för att göra en grundläggande säkerhetstestning. Den innehöll även rekommendationer till Know IT Dalarna på områden som ska belysas och undersökas i framtiden. Checklistan kan användas av utvecklarna för att säkerställa att ett pågående projekt håller en bra nivå säkerhetsmässigt. Listan måste i framtiden uppdateras och hållas i fas med den ständiga tekniska utvecklingen som sker på området.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The scalar sector of the simplest version of the 3-3-1 electroweak model is constructed with three Higgs triplets only. We show that a relation involving two of the constants of the model, two vacuum expectation values of the neutral scalars, and the mass of the doubly charged Higgs boson leads to important information concerning the signals of this scalar particle.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Using a peculiar version of the SU(3)(L) circle times U(1)(N) electroweak model, we investigate the production of doubly charged Higgs boson at the Large Hadron Collider. Our results include branching ratio calculations for the doubly charged Higgs and for one of the neutral scalar bosons of the model. (c) 2006 Elsevier B.V. All rights reserved.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The Large Hadron Collider presents an unprecedented opportunity to probe the realm of new physics in the TeV region and shed light on some of the core unresolved issues of particle physics. These include the nature of electroweak symmetry breaking, the origin of mass, the possible constituent of cold dark matter, new sources of CP violation needed to explain the baryon excess in the universe, the possible existence of extra gauge groups and extra matter, and importantly the path Nature chooses to resolve the hierarchy problem - is it supersymmetry or extra dimensions. Many models of new physics beyond the standard model contain a hidden sector which can be probed at the LHC. Additionally, the LHC will be a. top factory and accurate measurements of the properties of the top and its rare decays will provide a window to new physics. Further, the LHC could shed light on the origin of neutralino masses if the new physics associated with their generation lies in the TeV region. Finally, the LHC is also a laboratory to test the hypothesis of TeV scale strings and D brane models. An overview of these possibilities is presented in the spirit that it will serve as a companion to the Technical Design Reports (TDRs) by the particle detector groups ATLAS and CMS to facilitate the test of the new theoretical ideas at the LHC. Which of these ideas stands the test of the LHC data will govern the course of particle physics in the subsequent decades.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

We study the collider phenomenology of bilinear R-parity violating supergravity, the simplest effective model for supersymmetric neutrino masses accounting for the current neutrino oscillation data. At the CERN Large Hadron Collider the center-of-mass energy will be high enough to probe directly these models through the search for the superpartners of the Standard Model (SM) particles. We analyze the impact of R-parity violation on the canonical supersymmetry searches-that is, we examine how the decay of the lightest supersymmetric particle (LSP) via bilinear R-parity violating interactions degrades the average expected missing momentum of the reactions and show how this diminishes the reach in the usual channels for supersymmetry searches. However, the R-parity violating interactions lead to an enhancement of the final states containing isolated same-sign di-leptons and trileptons, compensating the reach loss in the fully inclusive channel. We show how the searches for displaced vertices associated to LSP decay substantially increase the coverage in supergravity parameter space, giving the corresponding reaches for two reference luminosities of 10 and 100 fb(-1) and compare with those of the R-parity conserving minimal supergravity model.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Supersymmetric theories with bilinear R-parity violation can give rise to the observed neutrino masses and mixings. One important feature of such models is that the lightest supersymmetric particle might have a sufficiently large lifetime to produce detached vertices. Working in the framework of supergravity models, we analyze the potential of the LHCb experiment to search for supersymmetric models exhibiting bilinear R-parity violation. We show that the LHCb experiment can probe a large fraction of the m(0)circle times m(1/2), being able to explore gluino masses up to 1.3 TeV. The LHCb discover potential for these kinds of models is similar to the ATLAS and CMS ones in the low luminosity phase of operation of the LHC.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

We investigate a neutrino mass model in which the neutrino data is accounted for by bilinear R-parity violating supersymmetry with anomaly mediated supersymmetry breaking. We focus on the CERN Large Hadron Collider (LHC) phenomenology, studying the reach of generic supersymmetry search channels with leptons, missing energy and jets. A special feature of this model is the existence of long-lived neutralinos and charginos which decay inside the detector leading to detached vertices. We demonstrate that the largest reach is obtained in the displaced vertices channel and that practically all of the reasonable parameter space will be covered with an integrated luminosity of 10 fb(-1). We also compare the displaced vertex reaches of the LHC and Tevatron.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

We solve Einstein equations on the brane to derive the exact form of the brane-world-corrected perturbations in Kerr-Newman singularities, using Randall-Sundrum and Arkani-Hamed-Dimopoulos-Dvali (ADD) models. It is a consequence of such models that Kerr-Newman mini-black holes can be produced in LHC. We use this approach to derive a normalized correction for the Schwarzschild Myers-Perry radius of a static (4+n)-dimensional mini-black hole, using more realistic approaches arising from Kerr-Newman mini-black hole analysis. Besides, we prove that there are four Kerr-Newman black hole horizons in the brane-world scenario we use, although only the outer horizon is relevant in the physical measurable processes. Parton cross sections in LHC and Hawking temperature are also investigated as functions of Planck mass (in the LHC range 1-10 TeV), mini-black hole mass, and the number of large extra dimensions in brane-world large extra-dimensional scenarios. In this case a more realistic brane-effect-corrected formalism can achieve more precisely the effective extra-dimensional Planck mass and the number of large extra dimensions-in the Arkani-Hamed-Dimopoulos-Dvali model-or the size of the warped extra dimension-in Randall-Sundrum formalism.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

We investigate the sensitivity of the heavy ion mode of the LHC to anomalous Higgs boson couplings to photons, H gamma gamma, through the analysis of the processes gamma gamma --> b (b) over bar and gamma gamma --> gamma gamma in peripheral heavy ion collisions. We suggest cuts to improve the signal over background ratio and determine the capability of LHC to impose bounds on anomalous couplings by searching for a Higgs boson signal in these modes. (C) 2001 Elsevier B.V. B.V. All rights reserved.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

We demonstrate that a CERN LHC Higgs boson search in weak boson fusion production with subsequent decay to weak boson pairs is robust against extensions of the standard model or minimal supersymmetric standard model involving a large number of Higgs doublets. We also show that the transverse mass distribution provides unambiguous discrimination of a continuum Higgs signal from the standard model.