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The demanding beam performance requirements of the High Luminosity (HL-) LHC project translate into a set of requirements and upgrade paths for the LHC injector complex. In this paper the performance requirements for the SPS and the known…

For both the FCC-ee and the ILC, to exploit properly the respective precision physics program, the theoretical precision tag on the respective luminosity will need to be improved from the analogs of the $ 0.054 \% (0.061\%)$ results at LEP…

High Energy Physics - Phenomenology · Physics 2023-02-03 B. F. L. Ward , S. Jadach , W. Placzek , M. Skrzypek , S. A. Yost

The very forward region is one of the most challenging regions to instrument at a future $e^+e^-$ collider. At CEPC, machine-detector interface includes, among others, a calorimeter dedicated for precision measurement of the integrated…

Accurate measurements of particles masses, couplings and widths are possible by measuring production cross sections near threshold. We discuss the prospects for performing such measurements at a high luminosity muon collider.

High Energy Physics - Phenomenology · Physics 2009-10-31 M. S. Berger

We update present bounds on the helicity of the neutrinos produced in muon decay, including e+ e- -> fbar f LEP 2 data. These significantly reduce the limits derived from all the other electroweak precision data. In Standard Model…

High Energy Physics - Phenomenology · Physics 2015-03-17 Francisco del Aguila , Juan Antonio Aguilar-Saavedra , Jorge de Blas

The potential to discover a Standard-Model-like Higgs boson at the LHC in the mass range from 150-180 GeV, decaying into a pair of W bosons with subsequent leptonic decays, has been established during the last 10 years. Assuming that such a…

High Energy Physics - Phenomenology · Physics 2008-11-26 G. Davatz , M. Dittmar , F. Pauss

Leptonic decays of W/Z bosons provide the first electroweak precision measurements at the Large Hadron Collider (LHC). The results of measurements of inclusive W and Z boson production cross sections in pp collisions at $\sqrt{s}=7…

High Energy Physics - Experiment · Physics 2019-08-13 Jeremy Werner

We argue that an LHC measurement of some simple quantities related to the ratio of rates of e+mu- to e-mu+ events is surprisingly sensitive to as-yet unexcluded R-parity violating supersymmetric models with non-zero lambda-prime 231…

High Energy Physics - Phenomenology · Physics 2017-07-28 Christopher Gorham Lester , Benjamin Hylton Brunt

Precise measurements of the electromagnetic dipole moments of charged leptons are powerful probes of physics beyond the Standard Model of particle physics. It is essential to study avenues for optimizing the measurement strategies for the…

High Energy Physics - Phenomenology · Physics 2024-10-31 Kartik Bhide , Valerie Lang

A strategy to determine the luminosity at Hadron Colliders is discussed using the simultaneous W-boson and Z-boson event counts. The emphasis of the study will be on the uncertainty induced by the parton density functions. Understanding…

High Energy Physics - Phenomenology · Physics 2007-05-23 Walter T. Giele , Stephane A. Keller

The precision physics program of the ILC requires precise knowledge of the state of beam polarisation. In fact the Compton polarimeters intended for the ILC will have to measure the polarisation with error a factor of 2 smaller than the…

Instrumentation and Detectors · Physics 2014-11-20 Christoph Bartels , Anthony Hartin , Christian Helebrant , Daniela Kaefer , Jenny List

The very forward region is one of the most challenging regions to instrument at a future $e^+e^-$ collider. At CEPC, machine-detector interface includes, among others, a calorimeter dedicated for precision measurement of the integrated…

Instrumentation and Detectors · Physics 2022-11-24 Ivan Smiljanic , Ivanka Bozovic Jelisavcic , Goran Kacarevic , Natasa Vukasinovic , Ivana Vidakovic , Vladimir Rekovic

Pixelated silicon detectors are state-of-the-art technology to achieve precise tracking and vertexing at collider experiments, designed to accurately measure the hit position of incoming particles in high rate and radiation environments.…

Instrumentation and Detectors · Physics 2021-12-08 I. Zoi , A. Ebrahimi , F. Feindt , E. Garutti , P. Gunnellini , A. Hinzmann , C. Niemeyer , D. Pitzl , J. Schwandt , G. Steinbrück

At FCC-ee, about $1.7 \times 10^{11}$ \mbox{Z $\to$ \texttau$^+$\texttau$^-$} events will be produced. This high statistics in the clean e$^+$e$^-$ environment opens the possibility of much improved determinations of \texttau-lepton…

High Energy Physics - Experiment · Physics 2021-07-28 Mogens Dam

After the successful LHC operation at the center-of-mass energies of 7 and 8 TeV in 2010-2012, plans are actively advancing for a series of upgrades of the accelerator, culminating roughly ten years from now in the high-luminosity LHC…

Instrumentation and Detectors · Physics 2014-08-29 Walter Hopkins

Measurements of normalized differential top-quark-pair ($t\bar{t}$) production cross sections are performed using final states with two leptons ($e^+e^-$, $\mu^+\mu^-$, and $e^\pm\mu^\mp$) in proton-proton ($pp$) collisions at $\sqrt{s}$ =…

High Energy Physics - Experiment · Physics 2016-11-30 Mykola Savitskyi

The next-generation lepton colliders, such as CEPC, FCC-ee, and ILC will make precision measurement of the Higgs boson properties. We first extract the Higgs coupling precision from Higgs observables at CEPC to illustrate the potential of…

High Energy Physics - Phenomenology · Physics 2016-12-09 Shao-Feng Ge , Hong-Jian He , Rui-Qing Xiao

This paper explores the physics reach of the High-Luminosity Large Hadron Collider (HL-LHC) for searches of new particles decaying to two jets. We discuss inclusive searches in dijets and b-jets, as well as searches in semi-inclusive events…

High Energy Physics - Experiment · Physics 2018-06-06 S. V. Chekanov , J. T. Childers , D. Frizzell , J. Proudfoot , R. Wang

We investigate the LHC and Higgs Factory prospects for measuring the CP phase in the Higgs-tau-tau coupling. Currently this phase can be anywhere between 0 degrees (CP even) and 90 degrees (CP odd). A new, ideal observable is identified…

High Energy Physics - Phenomenology · Physics 2013-10-30 Roni Harnik , Adam Martin , Takemichi Okui , Reinard Primulando , Felix Yu