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We present a bottom-up approach to the question of supersymmetry breaking in the MSSM. Starting with the experimentally measurable low-energy supersymmetry breaking parameters, which can take any values consistent with present experimental…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Carena , P. H. Chankowski , M. Olechowski , S. Pokorski , C. E. M. Wagner

Jets plus missing transverse energy is one of the main search channels for new physics at the LHC. A major limitation lies in our understanding of QCD backgrounds. Using jet merging we can describe the number of jets in typical background…

High Energy Physics - Phenomenology · Physics 2011-05-25 Christoph Englert , Tilman Plehn , Peter Schichtel , Steffen Schumann

In order to assess the ability of jet observables to constrain the characteristics of the medium produced in heavy-ion collisions at the LHC, we investigate the influence of background subtraction and jet quenching on jet reconstruction,…

High Energy Physics - Phenomenology · Physics 2013-01-04 Liliana Apolinário , Néstor Armesto , Letícia Cunqueiro

A non-vanishing vacuum expectation value for an antisymmetric tensor field leads to the violation of Lorentz invariance, controlled by the dimension (-2) parameter, theta_{mu nu}. We assume that the zeroth order term in theta-expansion…

High Energy Physics - Phenomenology · Physics 2017-08-23 Irina Mocioiu , Maxim Pospelov , Radu Roiban

Motivated by the new results obtained in heavy-ion collision experiments at the LHC, several extensions of the standard calculations of energy loss have been made recently. In this manuscript, I provide a short overview of some of the…

High Energy Physics - Phenomenology · Physics 2013-10-23 Liliana Apolinário

This work explores various manifestations of bumblebee gravity within the metric-affine formalism. We investigate the impact of the Lorentz violation parameter, denoted as $X$, on the modification of the Hawking temperature. Our…

General Relativity and Quantum Cosmology · Physics 2024-02-01 A. A. Araújo Filho , H. Hassanabadi , N. Heidari , J. Kríz , S. Zare

Critical behavior of soft repulsive particles after quench of temperature near the jamming trasition is numerically investigated. It is found that the plateau of the mean square displacement of tracer particles and the pressure satisfy…

Statistical Mechanics · Physics 2015-03-19 Michio Otsuki , Hisao Hayakawa

Concept of transverse deflection probability of a parton that travels through strongly interacting medium, recently introduced by D'Eramo, Liu and Rajagopal, have been used to derive high energy evolution equation for the jet quenching…

High Energy Physics - Phenomenology · Physics 2018-02-07 Raktim Abir

Jet quenching, the modification of the properties of a QCD jet when the parton cascade takes place inside a medium, is an intrinsically quantum process, where color coherence effects play an essential role. Despite a very significant…

High Energy Physics - Phenomenology · Physics 2021-04-13 João Barata , Carlos A. Salgado

We disclose the effects of Lifshitz dynamical exponent $z$ on the properties of holographic paramagnetic-ferromagnetic phase transition in the background of Lifshitz spacetime. To preserve the conformal invariance in higher dimensions, we…

High Energy Physics - Theory · Physics 2021-09-14 B. Binaei Ghotbabadi , A. Sheykhi , G. H. Bordbar

The problem of boundary conditions in a supersymmetric theory of quantum cosmology is studied, with application to the one-loop prefactor in the quantum amplitude. Our background cosmological model is flat Euclidean space bounded by a…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Peter D. D'Eath , Giampiero Esposito

We study the interplay between the flow and hydrodynamic gradients in jet quenching at first order in opacity. We find that the mixed flow-gradient contributions in jet quenching are enhanced by the medium length, and survive in the eikonal…

High Energy Physics - Phenomenology · Physics 2024-02-06 Matvey V. Kuzmin , Xoán Mayo López , Jared Reiten , Andrey V. Sadofyev

The effects of a Lorentz symmetry violating background vector on the Aharonov-Casher bound and scattering scenarios is considered. Using an approach based on the self-adjoint extension method, an expression for the bound state energies is…

High Energy Physics - Theory · Physics 2015-08-18 Edilberto O. Silva , Fabiano M. Andrade

We study the generalized supersymmetric t-J model with Kondo impurities in the boundaries. We first construct the higher spin operator K-matrix for the XXZ Heisenberg chain. Setting the boundary parameter to be a special value, we find a…

Strongly Correlated Electrons · Physics 2009-10-31 Heng Fan , Miki Wadati , Rui-hong Yue

In this paper, the relativistic quantum dynamics of a scalar particle under the effect of Lorentz symmetry violation determined by a tensor $(K_{F})_{\mu\,\nu\,\alpha\,\beta}$ out of the Standard Model Extension is investigated. We see that…

General Relativity and Quantum Cosmology · Physics 2021-06-25 Faizuddin Ahmed

The most suitable way to study the jet quenching as a function of distance traversed is varying the impact parameter b of ultrarelativistic nucleus-nucleus collision (initial energy density in nuclear overlapping zone is almost independent…

High Energy Physics - Phenomenology · Physics 2016-09-06 I. P. Lokhtin , A. M. Snigirev

A model for spontaneous symmetry breaking using a specific form of the bumblebee model is analyzed in the context of a Schwarzschild background metric. The resulting back reaction of the symmetry-breaking field on the metric is computed to…

High Energy Physics - Phenomenology · Physics 2019-11-07 Don Colladay

In this paper, we employ the gauge/gravity duality to study jet quenching (JQ) phenomena in the quark-gluon plasma. For this purpose, we implement holographic QCD models constructed from an Einstein-Maxwell-dilaton gravity at finite…

High Energy Physics - Theory · Physics 2026-01-01 Irina Ya. Aref'eva , Ali Hajilou , Alexander Nikolaev , Pavel Slepov

Subtraction of the large background in reconstruction is a key ingredient in jet studies in high-energy heavy-ion collisions at RHIC and the LHC. Here we address the question to which extent the most commonly used subtraction techniques are…

High Energy Physics - Phenomenology · Physics 2015-06-12 Liliana Apolinário , Néstor Armesto , Leticia Cunqueiro

In the presence of Lorentz violation, the motion of a charged particle in a magnetic field is distorted. By measuring the eccentricities of particles' elliptical orbits and studying how those eccentricities vary with the absolute…

High Energy Physics - Phenomenology · Physics 2011-10-17 Brett Altschul