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Rare decays of the Z boson provide a sensitive probe for physics beyond the Standard Model (SM). This study investigates the $e^{+}e^{-} \to Z \to \nu\bar{\nu}\gamma$ process within the context of the Tera-Z programmes at future colliders…

High Energy Physics - Phenomenology · Physics 2026-03-27 H. Denizli , A. Senol , M. Köksal

We study the CP-conserving and CP-violating dimension-six operators of Higgs-gauge boson couplings via $pp\to\gamma\gamma$+n-jet signal process in a strongly interacting light Higgs based effective field theory framework at the center of…

High Energy Physics - Phenomenology · Physics 2021-02-03 H. Denizli , A. Senol

Fermion compositness, and other new physics which can be described by an exchange of very massive particles ($Z^\prime$ boson, leptoquarks, sparticles with R-parity violating couplings), can be manifest itself as the presence of a strong…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. A. Pankov

We present an implementation of electroweak $ZZjj$ production in the POWHEG BOX V2 framework, an upgrade of the POWHEG BOX program which includes a number of new features that are particularly helpful for high-multiplicity processes. We…

High Energy Physics - Phenomenology · Physics 2015-06-18 Barbara Jager , Alexander Karlberg , Giulia Zanderighi

The first observation of the electroweak (EW) production of a Z boson, a photon, and two forward jets (Z$\gamma$jj) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. A data set corresponding to an integrated…

High Energy Physics - Experiment · Physics 2021-10-13 CMS Collaboration

We present the leading order unpolarized and polarized cross sections in electroweak semi-inclusive deep inelastic leptoproduction. The azimuthal dependences in the cross section differential in the transverse momentum of the vector boson…

High Energy Physics - Phenomenology · Physics 2009-10-31 Daniel Boer , R. Jakob , P. J. Mulders

We study possibilities to measure the triple anomalous W-boson couplings to photon in the $e\gamma\to W\nu$ process via its lepton decay channel (with the simplest signature). We found that in the study of the $W$ quadruple momentum…

High Energy Physics - Phenomenology · Physics 2007-05-23 Dmitriy A. Anipko , Ilya F. Ginzburg , Alexey V. Pak

Using the chargino-neutralino and slepton search results from the LHC in conjunction with the WMAP/PLANCK and $(g-2)_{\mu}$ data, we constrain several generic pMSSM models with decoupled strongly interacting sparticles, heavier Higgs bosons…

High Energy Physics - Phenomenology · Physics 2014-07-07 Manimala Chakraborti , Utpal Chattopadhyay , Arghya Choudhury , Amitava Datta , Sujoy Poddar

Light CP-violating Higgs bosons with mass lower than 70 GeV might have escaped detection in direct searches at the LEP collider. They may remain undetected in conventional search channels at the Tevatron and LHC. In this Letter we show that…

High Energy Physics - Phenomenology · Physics 2008-11-26 B. E. Cox , J. R. Forshaw , J. S. Lee , J. Monk , A. Pilaftsis

We explore $\mathcal CP$-violation effects of Higgs-top interactions in the associated production of a Higgs boson with top-pair in the dileptonic decay modes of top-quark originating from proton proton collisions $pp \to t\bar{t}H \to (l^+…

High Energy Physics - Phenomenology · Physics 2023-08-08 Apurba Tiwari , Sudhir Kumar Gupta

We explore the potential for the discovery of a dilaton $\mathcal{O}(200-500)$ GeV in a classical scale/conformal invariant extension of the Standard Model by investigating the size of the corresponding breaking scale $\Lambda$ at the LHC,…

High Energy Physics - Phenomenology · Physics 2016-10-12 Priyotosh Bandyopadhyay , Claudio Coriano , Antonio Costantini , Luigi Delle Rose

We obtain constraints on possible anomalous interactions of the top quark with the electroweak vector bosons arising from the precision measurements at the Z pole. In the framework of $SU(2)_L \otimes U(1)_Y$ chiral Lagrangians, we examine…

High Energy Physics - Phenomenology · Physics 2009-10-30 O. J. P. Eboli , M. C. Gonzalez-Garcia , S. F. Novaes

The standard model (SM) production of four top quarks ($\mathrm{t\bar{t}t\bar{t}}$) in proton-proton collision is studied by the CMS Collaboration. The data sample, collected during the 2016-2018 data taking of the LHC, corresponds to an…

High Energy Physics - Experiment · Physics 2020-02-04 CMS Collaboration

Measurements of the di- and multiboson production cross sections at the LHC constitute stringent tests of the electroweak sector of the Standard Model and provide a model-independent means to search for new physics at the TeV scale. The…

High Energy Physics - Experiment · Physics 2017-08-23 Elena Yatsenko

The cross sections for the reaction $\gamma\gamma\rightarrow 4\ell$ in proton--proton collisions are calculated at the LHC energies. We show that the purely electroweak process $\gamma\gamma\rightarrow 4\ell$ can be studied at the LHC and…

High Energy Physics - Phenomenology · Physics 2016-08-24 Mateusz Dyndal , Laurent Schoeffel

We report on the measurement of the $\gamma p \rightarrow J/\psi p$ cross section from $E_\gamma = 11.8$ GeV down to the threshold at $8.2$ GeV using a tagged photon beam with the GlueX experiment. We find the total cross section falls…

Nuclear Experiment · Physics 2019-09-12 The GlueX Collaboration , A. Ali , M. Amaryan , E. G. Anassontzis , A. Austregesilo , M. Baalouch , F. Barbosa , J. Barlow , A. Barnes , E. Barriga , T. D. Beattie , V. V. Berdnikov , T. Black , W. Boeglin , M. Boer , W. J. Briscoe , T. Britton , W. K. Brooks , B. E. Cannon , N. Cao , E. Chudakov , S. Cole , O. Cortes , V. Crede , M. M. Dalton , T. Daniels , A. Deur , S. Dobbs , A. Dolgolenko , R. Dotel , M. Dugger , R. Dzhygadlo , H. Egiyan , A. Ernst , P. Eugenio , C. Fanelli , S. Fegan , A. M. Foda , J. Foote , J. Frye , S. Furletov , L. Gan , A. Gasparian , V. Gauzshtein , N. Gevorgyan , C. Gleason , K. Goetzen , A. Goncalves , V. S. Goryachev , L. Guo , H. Hakobyan , A. Hamdi , S. Han , J. Hardin , G. M. Huber , A. Hurley , D. G. Ireland , M. M. Ito , N. S. Jarvis , R. T. Jones , V. Kakoyan , G. Kalicy , M. Kamel , C. Kourkoumelis , S. Kuleshov , I. Kuznetsov , I. Larin , D. Lawrence , D. I. Lersch , H. Li , W. Li , B. Liu , K. Livingston , G. J. Lolos , V. Lyubovitskij , D. Mack , H. Marukyan , V. Matveev , M. McCaughan , M. McCracken , W. McGinley , J. McIntyre , C. A. Meyer , R. Miskimen , R. E. Mitchell , F. Mokaya , F. Nerling , L. Ng , A. I. Ostrovidov , Z. Papandreou , M. Patsyuk , P. Pauli , R. Pedroni , L. Pentchev , K. J. Peters , W. Phelps , E. Pooser , N. Qin , J. Reinhold , B. G. Ritchie , L. Robison , D. Romanov , C. Romero , C. Salgado , A. M. Schertz , R. A. Schumacher , J. Schwiening , K. K. Seth , X. Shen , M. R. Shepherd , E. S. Smith , D. I. Sober , A. Somov , S. Somov , O. Soto , J. R. Stevens , I. I. Strakovsky , K. Suresh , V. Tarasov , S. Taylor , A. Teymurazyan , A. Thiel , G. Vasileiadis , D. Werthmueller , T. Whitlatch , N. Wickramaarachchi , M. Williams , T. Xiao , Y. Yang , J. Zarling , Z. Zhang , G. Zhao , Q. Zhou , X. Zhou , B. Zihlmann

A measurement of the W boson pair production cross section in proton-proton collisions at sqrt(s) = 8 TeV is presented. The data collected with the CMS detector at the LHC correspond to an integrated luminosity of 19.4 inverse femtobarns.…

High Energy Physics - Experiment · Physics 2016-08-17 CMS Collaboration

We consider the possibility of observing deviations from the Standard Model gauge-boson self-couplings at a future $500$~GeV $e^+ e^-$ linear collider. We concentrate on the case in which the electroweak symmetry breaking sector is strongly…

High Energy Physics - Phenomenology · Physics 2009-10-28 A. A. Likhoded , T. Han , G. Valencia

A new exclusion limit for the electromagnetic production of a light U(1) gauge boson {\gamma}' decaying to e^+e^- was determined by the A1 Collaboration at the Mainz Microtron. Such light gauge bosons appear in several extensions of the…

Recent measurements at the Large Hadron Collider allow for a robust and precise characterisation of the electro-weak interactions of the top quark. We present the results of a global analysis at next-to-leading order precision including…

High Energy Physics - Phenomenology · Physics 2022-02-14 Víctor Miralles , Marcos Miralles López , María Moreno Llácer , Ana Peñuelas , Martín Perelló , Marcel Vos