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Jet vetoes are a prominent part of the signal selection in various analyses at the LHC. We discuss jet vetoes for which the transverse momentum of a jet is weighted by a smooth function of the jet rapidity. With a suitable choice of the…

高能物理 - 唯象学 · 物理学 2015-03-25 Shireen Gangal , Maximilian Stahlhofen , Frank J. Tackmann

One of the main theoretical systematics in studies of final states with large jet multiplicities at high-energy hadron colliders is associated with the merging of QCD parton showers and hard-scattering matrix elements. We present a method…

高能物理 - 唯象学 · 物理学 2022-09-28 A. Bermudez Martinez , F. Hautmann , M. L. Mangano

Dijet events in photon-proton collisions in which there is a large pseudorapidity separation Delta eta > 2.5 between the two highest E_T jets are studied with the H1 detector at HERA. The inclusive dijet cross sections are measured as…

高能物理 - 实验 · 物理学 2008-11-26 H1 Collaboration , C. Adloff

We present a next-to-leading order QCD calculation for the single-inclusive production of collimated jets at hadron colliders, when the jet is defined by maximizing a suitable jet function that depends on the momenta of final-state…

高能物理 - 唯象学 · 物理学 2015-03-05 Tom Kaufmann , Asmita Mukherjee , Werner Vogelsang

We compute the complete set of two-loop beam functions for the transverse momentum distribution of the leading jet produced in association with an arbitrary colour-singlet system. Our results constitute the last missing ingredient for the…

高能物理 - 唯象学 · 物理学 2023-05-17 Samuel Abreu , Jonathan R. Gaunt , Pier Francesco Monni , Luca Rottoli , Robert Szafron

Jet interactions in a hot QCD medium created in heavy-ion collisions are conventionally assessed by measuring the modification of the distributions of jet observables with respect to the proton-proton baseline. However, the steeply falling…

高能物理 - 唯象学 · 物理学 2021-04-01 Yi-Lun Du , Daniel Pablos , Konrad Tywoniuk

We discuss four-jet production at the LHC. We calculate cross section for both single-parton scattering (SPS) using the ALPGEN code as well as for double-parton scattering (DPS) in leading-order collinear approach. Our results are compared…

高能物理 - 唯象学 · 物理学 2015-03-30 Rafal Maciula , Antoni Szczurek

Non-global QCD observables are characterised by a sensitivity to the full angular distribution of soft radiation emitted coherently in hard scattering processes. This complexity poses a challenge to their all-order resummation, that was…

高能物理 - 唯象学 · 物理学 2022-04-13 Andrea Banfi , Frédéric A. Dreyer , Pier Francesco Monni

We analyze the production of a single top squark at hadron colliders: ppbar/pp -> \tilde{t}_1 + X. The total cross sections and the transverse momentum distributions are presented in next-to-leading order QCD. The higher-order corrections…

高能物理 - 唯象学 · 物理学 2009-10-31 T. Plehn

We present a new general algorithm for calculating arbitrary jet cross sections in arbitrary scattering processes to next-to-leading accuracy in perturbative QCD. The algorithm is based on the subtraction method. The key ingredients are new…

高能物理 - 唯象学 · 物理学 2009-10-28 Stefano Catani , Michael H. Seymour

Two-jet cross sections in deep inelastic scattering at HERA are calculated in next-to-leading order. The QCD corrections are implemented in a new $ep\rightarrow n$ jets event generator, MEPJET, which allows to analyze arbitrary jet…

高能物理 - 唯象学 · 物理学 2009-10-28 Erwin Mirkes , Dieter Zeppenfeld

Jet fragmentation transverse momentum ($j_{\rm T}$) distributions are measured in proton-proton (pp) and proton-lead (p-Pb) collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed with the…

核实验 · 物理学 2021-12-10 ALICE Collaboration

The production of forward jets of transverse momentum $p_T(j)\approx Q$ and large momentum fraction $x_{jet}\gg x$ probes the onset of BFKL dynamics at HERA. A full ${\cal O}(\alpha_s^2)$ calculation of the inclusive forward jet cross…

高能物理 - 唯象学 · 物理学 2007-05-23 Erwin Mirkes , Dieter Zeppenfeld

Gradient jet tomography in high-energy heavy-ion collisions utilizes the asymmetric transverse momentum broadening of a propagating parton in an inhomogeneous medium. Such broadening is studied within a path integral description of the…

高能物理 - 唯象学 · 物理学 2023-04-12 Yu Fu , Jorge Casalderrey-Solana , Xin-Nian Wang

Differential spectra in observables that resolve additional soft or collinear QCD emissions exhibit Sudakov double logarithms in the form of logarithmic plus distributions. Important examples are the total transverse momentum $q_T$ in…

高能物理 - 唯象学 · 物理学 2017-02-24 Markus A. Ebert , Frank J. Tackmann

Results on inclusive jet production in proton-antiproton collisions at sqrt(s) =1.96 TeV based on 1 fb-1 of CDF Run II data are presented. Measurements are preformed using the k_T algorithm in a wide range of jet transverse momentum and jet…

高能物理 - 实验 · 物理学 2007-05-23 Olga Norniella

The production of the three jets in hadron-hardon collision is the first more complex process which allow us to define a branch of variables in order to do more precise measurement of the strong coupling and the parton distribution function…

高能物理 - 唯象学 · 物理学 2008-11-26 Zoltan Nagy

The distributions of transverse momentum and longitudinal momentum fraction of charged particles in jets are measured in Pb+Pb and pp collisions with the ATLAS detector at the LHC. The distributions are measured as a function of jet…

高能物理 - 实验 · 物理学 2017-09-20 ATLAS Collaboration

We construct dijet differential cross sections at large momentum transfer, in which threshold logarithms have been summed to all orders in perturbation theory. This extends previous work on heavy quark production, by treating collinear…

高能物理 - 唯象学 · 物理学 2014-11-17 Nikolaos Kidonakis , Gianluca Oderda , George Sterman

Di-jet production is studied in collisions of quasi-real photons radiated by the LEP beams at e+e- centre-of-mass energies 161 and 172 GeV. The jets are reconstructed using a cone jet finding algorithm. The angular distributions of direct…

高能物理 - 实验 · 物理学 2008-11-26 OPAL Collaboration , G. Abbiendi et al