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We study the resummation of soft gluon emission corrections to the production of a top-antitop pair in association with a Z boson at the Large Hadron Collider to next-to-next-to-leading logarithmic accuracy. By means of an in-house parton…

High Energy Physics - Phenomenology · Physics 2017-05-24 Alessandro Broggio , Andrea Ferroglia , Giovanni Ossola , Ben D. Pecjak , Ray D. Sameshima

The detection of pairs of sleptons, charginos and charged higgs bosons produced via photon-photon fusion at the LHC is studied, assuming a couple of benchmark points of the MSSM model. Due to low cross sections, it requires large integrated…

High Energy Physics - Phenomenology · Physics 2008-12-18 N. Schul , K. Piotrzkowski

Motivated by current searches for electroweak superpartners at the Large Hadron Collider, we present precision predictions for pair production of such particles in the framework of the Minimal Supersymmetric Standard Model. We make use of…

High Energy Physics - Phenomenology · Physics 2013-05-09 Benjamin Fuks , Michael Klasen , David R. Lamprea , Marcel Rothering

Accurate theoretical calculations of slepton pair production processes at threshold are necessary for an accurate determination of slepton masses. We discuss the gauge invariant calculation of these processes for selectron and smuon pairs,…

High Energy Physics - Phenomenology · Physics 2009-04-13 A. Freitas , D. J. Miller

Due to the greater experimental precision expected from the currently ongoing LHC Run 3, equally accurate theoretical predictions are essential. We update the documentation of the Resummino package, a program dedicated to precision cross…

High Energy Physics - Phenomenology · Physics 2023-08-09 J. Fiaschi , B. Fuks , M. Klasen , A. Neuwirth

We improve the theoretical predictions for the production of extra neutral gauge bosons at hadron colliders by implementing the Z' bosons in the MC@NLO generator and by computing their differential and total cross sections in joint p_T and…

High Energy Physics - Phenomenology · Physics 2008-11-26 B. Fuks , M. Klasen , F. Ledroit , Q. Li , J. Morel

Results are presented of a search for heavy stable charged particles produced in proton-proton collisions at sqrt(s) = 13 TeV using a data sample corresponding to an integrated luminosity of 2.5 inverse femtobarns collected in 2015 with the…

High Energy Physics - Experiment · Physics 2017-01-06 CMS Collaboration

We study the prospects for detecting the sleptons of the Minimal Supersymmetric Standard Model at hadron colliders and supercolliders. We use ISAJET 7.03 to simulate charged slepton and sneutrino pair production, incorporating slepton and…

High Energy Physics - Phenomenology · Physics 2011-03-17 H. Baer , C. Chen , F. Paige , X. Tata

Theoretical predictions for the production cross sections of leptoquarks at the CERN LHC are presented including higher-order QCD corrections. These corrections reduce the dependence on the renormalization/factorization scales…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Krämer , T. Plehn , M. Spira , P. M. Zerwas

We investigate the potentials of future high energy lepton-proton colliders to detect supersymmetric particles in the charged current type $lp\to\tilde\nu_l\tilde qX$, $l=e,\mu$, reactions. We also study their decays by using the mass…

High Energy Physics - Phenomenology · Physics 2009-11-07 A. T. Alan , S. Sultansoy

We discuss the production of photon pairs in hadronic collisions, from fixed target to LHC energies. The study which follows is based on a QCD calculation at full next-to-leading order accuracy, including single and double fragmentation…

High Energy Physics - Phenomenology · Physics 2011-09-13 T. Binoth , J. Ph. Guillet , E. Pilon , M. Werlen

We calculate total and differential cross sections for the pair production, at the Large Hadron Collider, of exotic leptons that could emerge from models with vector-like leptons and in Type-III seesaw scenarios. Our predictions include…

High Energy Physics - Phenomenology · Physics 2023-04-17 A. H. Ajjath , Benjamin Fuks , Hua-Sheng Shao , Yehudi Simon

A new method is presented for measuring the spin of selectrons and smuons at the Large Hadron Collider (LHC), using an angular variable which is sensitive to the polar angle in direct slepton pair production. This variable is invariant…

High Energy Physics - Phenomenology · Physics 2009-11-11 A. J. Barr

Scenarios with new physics particles feebly interacting with the Standard Model sector provide compelling candidates for dark matter searches. Geared with a set of new experiments for the detection of neutrinos and long-lived particles the…

High Energy Physics - Phenomenology · Physics 2024-04-12 Luca Buonocore , Felix Kling , Luca Rottoli , Jonas Sominka

If the minimal supersymmetric standard model at scales of around 1 TeV is realized in nature, the total top-squark pair production cross section should be measurable at the CERN Large Hadron Collider. In this work we present precise…

High Energy Physics - Phenomenology · Physics 2015-06-15 Alessandro Broggio , Andrea Ferroglia , Matthias Neubert , Leonardo Vernazza , Li Lin Yang

Searches for the electroweak production of charginos, neutralinos and sleptons in final states characterized by the presence of two leptons (electrons and muons) and missing transverse momentum are performed using 20.3 fb-1 of proton-proton…

High Energy Physics - Experiment · Physics 2014-08-21 ATLAS Collaboration

At the LHC, directly pair-produced sleptons may be easier to identify than those arising in cascade decays of squarks or gluinos. Higgs exchange processes leading to such slepton pair-production are calculated to one-loop in the MSSM. It…

High Energy Physics - Phenomenology · Physics 2007-05-23 Mike Bisset , Sreerup Raychaudhuri , Probir Roy

If supersymmetry near the TeV scale is realized in Nature, the pair production of scalar top squarks is expected to be observable at the Large Hadron Collider. Recently, effective field-theory methods were employed to obtain approximate…

High Energy Physics - Phenomenology · Physics 2015-06-18 Alessandro Broggio , Andrea Ferroglia , Matthias Neubert , Leonardo Vernazza , Li Lin Yang

The production of a top-antitop quark pair in association with a $W$ boson ($t\bar tW$) is one of the heaviest signatures currently probed at the Large Hadron Collider (LHC). Since the first observation reported in 2015 the corresponding…

High Energy Physics - Phenomenology · Physics 2023-12-08 Luca Buonocore , Simone Devoto , Massimiliano Grazzini , Stefan Kallweit , Javier Mazzitelli , Luca Rottoli , Chiara Savoini

We present a calculation of the next-to-leading order QCD corrections to slepton pair production in association with a jet at the LHC together with their implementation in the POWHEG BOX. For the simulation of parton-shower effects and the…

High Energy Physics - Phenomenology · Physics 2015-06-23 Barbara Jager , Andreas von Manteuffel , Stephan Thier