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Dielectrons are unique observables in ultra-relativistic heavy-ion collisions. Thanks to their penetrating nature, they carry information from all stages of the collision and can provide knowledge about pre-equilibirium dynamics, QGP…

Nuclear Experiment · Physics 2024-04-24 Harald Appelshäuser

We systematically study the possibility to probe the physics behind the electroweak symmetry breaking at the LHC assuming new strong interactions being responsible for the effect. The new physics is described by the Higgs-less effective…

High Energy Physics - Phenomenology · Physics 2009-03-12 M. Gintner , I. Melo , B. Trpisova

We calculate the order O(alpha^2 alpha_s^3) interference effect between the gluon fusion and weak boson fusion processes allowed at the one-loop level in Higgs boson plus 2 jet production at the LHC. The corresponding one-loop amplitudes,…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. R. Andersen , T. Binoth , G. Heinrich , J. M. Smillie

For the Standard Model extended with a real scalar singlet field, the modification of the heavy Higgs signal due to interference with the continuum background and the off-shell light Higgs contribution is studied for gg --> ZZ, WW --> 4…

High Energy Physics - Phenomenology · Physics 2015-09-30 Nikolas Kauer , Claire O'Brien

Prospective searches about Higgs physics and beyond the Standard Model are presented for the CMS and ATLAS experiments. Possible excesses of events in real data could be an indication of the existence of new particles, even with few hundred…

High Energy Physics - Experiment · Physics 2009-06-11 N. De Filippis , for CMS , ATLAS Collaboration

The Large Hadron Collider will provide an unprecedented quantity of collision data right from the start-up. The challenge for the LHC experiments is the quick use of these data for the final commissioning of the detectors, including…

High Energy Physics - Experiment · Physics 2007-05-23 Kati Lassila-Perini

The Higgs boson discovery at the Large Hadron Collider (LHC) at CERN confirmed the existence of the last missing particle of the Standard Model (SM). The existence of new fundamental constituents of matter beyond the SM is of great…

High Energy Physics - Phenomenology · Physics 2025-03-25 Srimoy Bhattacharya , Benjamin Lieberman , Mukesh Kumar , Andreas Crivellin , Yaquan Fang , Rachid Mazini , Bruce Mellado

We consider the diphoton resonance at the 13 TeV LHC in a consistent model with new scalars and vector-like fermions added to the Standard Model (SM), which can be constructed from orbifold grand unified theories and string models. The…

High Energy Physics - Phenomenology · Physics 2016-03-30 Bhaskar Dutta , Yu Gao , Tathagata Ghosh , Ilia Gogoladze , Tianjun Li

We extend the relativistic plane--wave impulse approximation formalism to incorporate a specific class of relativistic interference effects for use in describing inclusive electrodisintegration of $^2$H. The role of these ``exchange'' terms…

Nuclear Theory · Physics 2009-10-22 G. I. Poulis , T. W. Donnelly

The considerable center-of-mass energy and luminosity provided by the Large Hadron Collider (LHC) will ensure a discovery reach for new particles which extends well into the multi-TeV region. ATLAS and CMS have carried out many studies of…

High Energy Physics - Experiment · Physics 2019-08-14 Kamal Benslama

At present, the simulations for hadronic Z decay used at the Large Hadron Collider (LHC) neglect the effects of interference between the electroweak production of the hadronic Z boson and the Quantum Chromodynamics (QCD) production of…

High Energy Physics - Experiment · Physics 2022-08-30 Arman Boroumand Naeini

Many domains of high energy physics analysis are starting to explore machine learning techniques. Powerful methods can be used to identify and measure rare processes from previously insurmountable backgrounds. One of the most profound…

High Energy Physics - Phenomenology · Physics 2020-09-16 Benjamin Tannenwald , Christopher Neu , Ang Li , Gracemarie Buehlmann , Anna Cuddeback , Leigh Hatfield , Ruhi Parvatam , Colby Thompson

The observation of resonances is unequivocal evidence of new physics beyond the Standard Model at the Large Hadron Collider (LHC). So far, inclusive and model dependent searches have not provided evidence of new resonances, indicating that…

High Energy Physics - Experiment · Physics 2021-11-29 Salah-eddine Dahbi , Joshua Choma , Bruce Mellado , Gaogalalwe Mokgatitswane , Xifeng Ruan , Benjamin Lieberman , Turgay Celik

The signature at the LHC of many Beyond the Standard Model (BSM) scenarios is events with large missing energy. If the forward outgoing protons are measured, we show that the production and decay of BSM particles in the central rapidity…

High Energy Physics - Phenomenology · Physics 2014-11-20 V. A. Khoze , A. D. Martin , M. G. Ryskin , A. G. Shuvaev

The ATLAS and CMS collaborations at the LHC have recently announced evidence for the rare Higgs boson decay into a $Z$ boson and a photon. We analyze the interference between the process $gg\! \to \! H \! \to \! Z \gamma$ induced by loops…

High Energy Physics - Phenomenology · Physics 2024-03-29 Federico Buccioni , Federica Devoto , Abdelhak Djouadi , John Ellis , Jérémie Quevillon , Lorenzo Tancredi

Several current measurements of $b \rightarrow s l^+ l^-$ processes are in tension with Standard Model predictions, whereas others (e.g.\ $R_K$ and $R_{K^\ast}$) are in reasonable agreement with them. We examine some recent $Z^\prime$…

High Energy Physics - Phenomenology · Physics 2024-10-18 Ben Allanach

Pair production of heavy vector bosons is a key process at colliders: it allows to test our understanding of the Standard Model and to explore the existence of new physics through precision measurements of production rates and differential…

High Energy Physics - Phenomenology · Physics 2023-07-21 Rafael Aoude , Eric Madge , Fabio Maltoni , Luca Mantani

This article gives an overview of recent highlights from experimental measurements of heavy-ion collisions at ultra-relativistic energies: Measurements of electroweak probes constrain both the initial collision geometry and the nuclear…

Nuclear Experiment · Physics 2020-12-17 Yvonne Pachmayer

A series of new physics scenarios predict the existence of the extra charged gauge boson $W'$, which can induce charged-current (CC) non-standard neutrino interactions (NSIs). The theoretical constraints on the simplified $W'$ model and…

High Energy Physics - Phenomenology · Physics 2023-03-02 Chong-Xing Yue , Xue-Jia Cheng , Ji-Chong Yang

Many of the open questions beyond the Standard Model will be addressed by the LHC, including the origin of mass, supersymmetry, dark matter and the possibility of large extra dimensions. A linear e+ e- collider (LC) with sufficient…

High Energy Physics - Phenomenology · Physics 2009-09-11 John Ellis
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