A5103250703- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Neutrino Physics Research
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Anomaly Detection Techniques and Applications
- International Science and Diplomacy
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Meteorological Phenomena and Simulations
- Photocathodes and Microchannel Plates
- Space Science and Extraterrestrial Life
- Scientific Research and Discoveries
- Medical Imaging Techniques and Applications
- Machine Learning in Healthcare
- Electronic Health Records Systems
- DNA Repair Mechanisms
- Algorithms and Data Compression
RWTH Aachen University
2016-2025
Berlin Institute of Health at Charité - Universitätsmedizin Berlin
2024
SLAC National Accelerator Laboratory
2010-2016
Stanford University
2014-2016
Deutsches Elektronen-Synchrotron DESY
1992-2014
European Organization for Nuclear Research
1999-2014
University of Bonn
2007-2014
Institute of High Energy Physics
2012-2013
Institute of Particle Physics
2012
Howard Hughes Medical Institute
2011
We review the theoretical status of squark and gluino hadroproduction provide numerical predictions for all pair-production processes at Tevatron LHC, with a particular emphasis on proton–proton collisions 7 TeV. Our include next-to-leading order supersymmetric QCD corrections resummation soft gluon emission next-to-leading-logarithmic accuracy. discuss impact higher-order total cross-sections, an estimate uncertainty due to scale variation parton distribution functions.
We present state-of-the-art cross section predictions for the production of supersymmetric squarks and gluinos at upcoming LHC run with a centre-of-mass energy $$\sqrt{s} = 13$$ $$14$$ TeV, potential future $$pp$$ colliders operating 33$$ $$100$$ TeV. The results are based on calculations which include resummation soft-gluon emission next-to-leading logarithmic accuracy, matched to order QCD corrections. Furthermore, we provide an estimate theoretical uncertainty due variation...
We evaluate dark matter (DM) limits from cosmic-ray antiproton observations using the recent precise AMS-02 measurements. properly take into account propagation uncertainties, fitting DM and parameters at same time marginalizing over latter. find a significant indication of signal for masses near 80 GeV, with hadronic annihilation cross section close to thermal value, ⟨σv⟩≈3×10−26 cm3 s−1. Intriguingly, this is compatible interpretation Galactic center gamma-ray excess. Confirmation will...
Cross sections for elastic and proton-dissociative photoproduction of J/ψ mesons are measured with the H1 detector in positron-proton collisions at HERA. The data were collected ep centre-of-mass energies $\sqrt{s}\approx318~\mathrm{GeV}$ $\sqrt {s}\approx225 \ \mbox{GeV}$ , corresponding to integrated luminosities $\mathcal{L} = 130~\mbox{pb}^{-1}$ 10.8~\mbox{pb}^{-1}$ respectively. cross as a function photon-proton energy range 25<W γp <110 GeV. Differential dσ/dt, where t is squared...
A bstract Autoencoders are widely used in machine learning applications, particular for anomaly detection. Hence, they have been introduced high energy physics as a promising tool model-independent new searches. We scrutinize the usage of autoencoders unsupervised detection based on reconstruction loss to show their capabilities, but also limitations. As particle benchmark scenario, we study tagging top jet images background QCD images. Although reproduce positive results from literature,...
Higgs bosons can be searched for in the channels pp macro/pp-->tt macro H + X at Fermilab Tevatron and Cern Large Hadron Collider (LHC). We have calculated QCD corrections to these processes standard model next-to-leading order. The higher-order reduce renormalization factorization scale dependence considerably stabilize theoretical predictions cross sections. At central mu = (2m(t)+M(H))/2 properly defined K factors are slightly below unity (K approximately 0.8) above LHC 1.2).
We analyze the production of charginos, neutralinos, and sleptons at hadron colliders Tevatron LHC in direct channels $p\overline{p}/pp\ensuremath{\rightarrow}{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\chi}}}_{i}{\stackrel{\ifmmode \~{}\fi{}}{\ensuremath{\chi}}}_{j}+X$ $\stackrel{\ifmmode \~{}\fi{}}{\ensuremath{\ell}}{\stackrel{\stackrel{\ifmmode \~{}\fi{}}{\ensuremath{\ell}}}{\ifmmode\bar\else\textasciimacron\fi{}}}^{\ensuremath{'}}+X$. The cross sections for these reactions...
Higgs-boson production in association with W or Z bosons, $p\overline{p}\ensuremath{\rightarrow}WH/ZH+X,$ is the most promising discovery channel for a light standard model Higgs particle at Fermilab Tevatron. We present calculation of electroweak $O(\ensuremath{\alpha})$ corrections to these processes. The decrease theoretical prediction by up 5%--10%, depending detail on mass and input-parameter scheme. update cross-section associated WH ZH Tevatron CERN LHC, including next-to-leading...
The complete set of electroweak O(alpha) corrections to the Drell--Yan-like production W bosons is calculated and compared an approximation provided by leading term expansion about W-resonance pole. All relevant formulae are listed explicitly, particular attention paid issues gauge invariance instability bosons. A detailed discussion numerical results underlines phenomenological importance W-boson at Tevatron LHC. While pole yields a good description resonance observables, it not sufficient...
The scalar partners of top and bottom quarks are expected to be the lightest squarks in supersymmetric theories, with potentially large cross sections at hadron colliders. We present predictions for production Tevatron LHC, including next-to-leading order corrections QCD resummation soft gluon emission next-to-leading-logarithmic accuracy. discuss impact higher-order on total transverse-momentum distributions, provide an estimate theoretical uncertainty due scale variation parton...
This document emerged from work that started in January 2012 as a joint effort by the ATLAS, CMS and LPCC supersymmetry (SUSY) working groups to compile state-of-the-art cross section predictions for SUSY particle production at LHC. We present sections various processes pp collisions $\sqrt{s} =7$ TeV, including an estimate of theoretical uncertainty due scale variation parton distribution functions. Further results higher LHC centre-of-mass energies will be collected...
A bstract We perform global fits to the parameters of Constrained Minimal Super-symmetric Standard Model (CMSSM) and a variant with non-universal Higgs masses (NUHM1). In addition constraints from low-energy precision observables cosmological dark matter density, we take into account LHC exclusions searches in jets plus missing transverse energy signatures about 5 fb −1 integrated luminosity. also include most recent upper bound on branching ratio B s → μμ LHCb. Furthermore, implications for...
We study constraints on new physics from Higgs production at the LHC in context of an effective field theory (EFT), focusing searches $HV$ ($V=W,Z$) associated which are particularly sensitive to high-energy behavior certain dimension-six operators. show that analyses these generally dominated by a kinematic region where generic EFT expansion breaks down, and we establish under conditions they can nevertheless be meaningful. For example, Wilson coefficients operators whose effects grow with...
If supersymmetry (SUSY) has a compressed spectrum then the current mass limits from LHC can be drastically reduced. We consider possible "worst case" scenario where gluino and/or squarks are degenerate with lightest SUSY particle (LSP). The most sensitive searches for these spectra via final state LSPs recoiling against initial radiation (ISR). match matrix element to parton shower accurately model ISR. All and monojet analyses employed we find that LSP decoupled gluinos, . For gluinos...
Weakly interacting dark matter particles can be pair-produced at colliders and detected through signatures featuring missing energy in association with either QCD/EW radiation or heavy quarks. In order to constrain the mass couplings standard model particles, accurate precise predictions for production cross sections distributions are of prime importance. this work, we consider various simplified models s-channel mediators. We implement such FeynRules/MadGraph5_aMC@NLO framework, which...
Global fits of primary and secondary cosmic-ray (CR) fluxes measured by AMS-02 have great potential to study CR propagation models search for exotic sources antimatter such as annihilating dark matter (DM). Previous studies antiprotons revealed a possible hint DM signal which, however, could be affected systematic uncertainties. To test the robustness signal, in this work we systematically two important uncertainties: antiproton production cross sections needed calculate source spectra...
We investigate the constrained Minimal Supersymmetric Standard Model (cMSSM) in light of constraining experimental and observational data from precision measurements, astrophysics, direct supersymmetry searches at LHC measurements properties Higgs boson, by means a global fit using program Fittino. As previous studies, we find rather poor agreement best point with data. also stability electro-weak vacuum preferred region parameter space around point. that is metastable, lifetime...
We extend the known Universal One-Loop Effective Action (UOLEA) by all operators which involve scalars and fermions, not including contributions arising from open covariant derivatives. Our generic analytic expressions for one-loop Wilson coefficients of effective up to dimension six allow an application UOLEA a broader class UV-complete models. apply our results various theories supersymmetric models, where different particles are integrated out at high mass scale.
Strongly interacting dark sectors predict novel LHC signatures such as semi-visible jets resulting from showers that contain both stable and unstable mesons. Distinguishing large QCD backgrounds is difficult constitutes an exciting challenge for jet classification. In this article we explore the potential of supervised deep neural networks to identify jets. We show dynamic graph convolutional operating on so-called particle clouds outperform analysing images well other based Lorentz vectors....