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We develop the maximum-entropy weak shear mass reconstruction method presented in earlier papers by taking each background galaxy image shape as an independent estimator of the reduced shear field and incorporating an intrinsic smoothness…

Astrophysics · Physics 2009-11-07 P. J. Marshall , M. P. Hobson , S. F. Gull , S. L. Bridle

We present a detailed mass reconstruction of the cluster RCS0224-0002 at $z=0.773$ from the strong lensing features observed with HST/WFPC2. The mass profile is reconstructed using a parametric approach. We introduce a novel method to fit…

Astrophysics · Physics 2009-11-13 J. Rzepecki , M. Lombardi , P. Rosati , A. Bignamini , P. Tozzi

We address the problem of mass measurements of supersymmetric particles at the Large Hadron Collider, using the ATLAS detector as an example. By using Markov Chain sampling techniques to combine standard measurements of kinematic edges in…

High Energy Physics - Phenomenology · Physics 2009-09-29 Christopher G. Lester , Michael A. Parker , Martin J. White

If supersymmetry exists at the electroweak scale, then it should be discovered at the LHC. Determining masses, of supersymmetric particles however, is more difficult. In this paper, methods are discussed to determine combinations of masses…

High Energy Physics - Phenomenology · Physics 2008-11-26 I. Hinchliffe , F. E. Paige , M. D. Shapiro , J. Soderqvist , W. Yao

A method for plasma delay and pulse-height defect corrections for Si surface barrier detectors (SBD) is presented. Based on known empirical formulae, simple approximations involving the measured time-of-flight (TOF) and energy of the ions…

Nuclear Experiment · Physics 2009-10-31 J. Velkovska , R. L. McGrath

We present a new strong lensing mass reconstruction of the Bullet cluster (1E 0657-56) at z=0.296, based on WFC3 and ACS HST imaging and VLT/FORS2 spectroscopy. The strong lensing constraints underwent substantial revision compared to…

Cosmology and Nongalactic Astrophysics · Physics 2016-10-26 D. Paraficz , J. -P. Kneib , J. Richard , A. Morandi , M. Limousin , E. Jullo , Johany Martinez

We study the possibility to determine the supersymmetric (SUSY) contribution to the muon anomalous magnetic dipole moment by using ILC measurements of the properties of superparticles. Assuming that the contribution is as large as the…

High Energy Physics - Phenomenology · Physics 2013-12-13 Motoi Endo , Koichi Hamaguchi , Sho Iwamoto , Teppei Kitahara , Takeo Moroi

We draw a possible scenario for the observation of massive long-lived charged particles at the LHC detector ATLAS. The required flexibility of the detector triggers and of the identification and reconstruction systems are discussed. As an…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. Ambrosanio , B. Mele , A. Nisati , S. Petrarca , G. Polesello , A. Rimoldi , G. Salvini

Event cameras are novel sensors that report brightness changes in the form of a stream of asynchronous "events" instead of intensity frames. They offer significant advantages with respect to conventional cameras: high temporal resolution,…

Computer Vision and Pattern Recognition · Computer Science 2019-06-19 Henri Rebecq , René Ranftl , Vladlen Koltun , Davide Scaramuzza

We explore, in a concrete example, to which extent new particle mass determinations are practicable with LHC data. Our chosen example is that of Yukawa-unified SUSY GUTs, whose viability has been recently studied for two general patterns of…

High Energy Physics - Phenomenology · Physics 2015-03-17 Kiwoon Choi , Diego Guadagnoli , Sang Hui Im , Chan Beom Park

Although synthetic aperture imaging (SAI) can achieve the seeing-through effect by blurring out off-focus foreground occlusions while recovering in-focus occluded scenes from multi-view images, its performance is often deteriorated by dense…

Computer Vision and Pattern Recognition · Computer Science 2022-12-06 Lei Yu , Xiang Zhang , Wei Liao , Wen Yang , Gui-Song Xia

This paper documents package for the particle level fast simulation. The package is designed to complete the AcerMC generator framework with the easy-to-use simulation and reconstruction algorithms. The package provides, starting from list…

High Energy Physics - Phenomenology · Physics 2007-05-23 E. Richter-Was

A method is proposed for determining the masses of the new particles N,X,Y,Z in collider events containing a pair of effectively identical decay chains Z to Y+jet, Y to X+l_1, X to N+l_2, where l_1, l_2 are opposite-sign same-flavour…

High Energy Physics - Phenomenology · Physics 2015-03-17 Mihoko M. Nojiri , Kazuki Sakurai , Bryan R. Webber

Searches for supersymmetry (SUSY) are performed using a sample of hadronic events produced in 8 TeV pp collisions at the CERN LHC. The searches are based on the MT2 variable, which is a measure of the transverse momentum imbalance in an…

High Energy Physics - Experiment · Physics 2015-05-20 CMS Collaboration

Some possible methods to determine at the LHC masses of SUSY particles are discussed.

High Energy Physics - Phenomenology · Physics 2011-03-02 Frank E. Paige

The observations in many applications consist of counts of discrete events, such as photons hitting a dector, which cannot be effectively modeled using an additive bounded or Gaussian noise model, and instead require a Poisson noise model.…

Optimization and Control · Mathematics 2016-11-17 Zachary T. Harmany , Roummel F. Marcia , Rebecca M. Willett

The maximum-entropy method is applied to the problem of reconstructing the projected mass density of a galaxy cluster using its gravitational lensing effects on background galaxies. We demonstrate the method by reconstructing the mass…

Astrophysics · Physics 2009-10-30 S. L. Bridle , M. P. Hobson , A. N. Lasenby , Richard Saunders

We propose a novel method to reconstruct high-resolution three-dimensional mass maps using data from photometric weak-lensing surveys. We apply an adaptive LASSO algorithm to perform a sparsity-based reconstruction on the assumption that…

Cosmology and Nongalactic Astrophysics · Physics 2022-02-03 Xiangchong Li , Naoki Yoshida , Masamune Oguri , Shiro Ikeda , Wentao Luo

We examine the ATLAS and CMS 7 & 8 TeV multijet supersymmetry (SUSY) searches requiring the incidence of a single lepton in the framework of the supersymmetric grand unified model No-Scale Flipped SU(5) with extra vector-like flippon…

High Energy Physics - Phenomenology · Physics 2013-09-18 Tianjun Li , James A. Maxin , Dimitri V. Nanopoulos , Joel W. Walker

This paper proposes new methods for analyzing dynamic images registered by multichannel, highly sensitive detectors with low spatial but high temporal resolution. The principal characteristic of the approach is the absence of factorization…

Instrumentation and Methods for Astrophysics · Physics 2024-10-10 S. A. Sharakin , R. E. Saraev