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We give a prescription for attaching parton showers to next-to-leading order (NLO) partonic jet cross sections in electron-positron annihilation. Our method effectively extends to NLO the scheme of Catani, Krauss, Kuhn, and Webber for…

高能物理 - 唯象学 · 物理学 2007-05-23 Zoltan Nagy , Davison E. Soper

Energy Correlators measure the energy deposited in multiple detectors as a function of the angles between the detectors. In this paper, we analytically compute the three particle correlator in the collinear limit in QCD for quark and gluon…

高能物理 - 唯象学 · 物理学 2020-11-10 Hao Chen , Ming-Xing Luo , Ian Moult , Tong-Zhi Yang , Xiaoyuan Zhang , Hua Xing Zhu

We derive a new method for initial-state collinear showering in Monte-Carlo event generators which is based on the use of unintegrated parton correlation functions. Combined with a previously derived method for final-state showering, the…

高能物理 - 唯象学 · 物理学 2008-11-26 John C. Collins , Xiaomin Zu

We investigate angular correlations in multi-jet final states at high-energy colliders and discuss their sensitivity to initial-state showering effects, including QCD coherence and corrections to collinear ordering.

高能物理 - 唯象学 · 物理学 2008-08-27 F. Hautmann , H. Jung

The jet quenching phenomenon in heavy ion collisions provides a strong evidence of the modification of parton shower in the quark-gluon plasma (QGP). Jet substructure observables can probe various aspects of the jet formation mechanism.…

高能物理 - 唯象学 · 物理学 2016-11-22 Yang-Ting Chien

Spin correlations in the top quark-antiquark system and the polarization of the top quark are measured using dilepton final states produced in pp collisions at the LHC at sqrt(s) = 7 TeV. The data correspond to an integrated luminosity of…

高能物理 - 实验 · 物理学 2014-05-07 CMS Collaboration

We probe for statistical and Coulomb induced spin textures among the low-lying states of repulsively-interacting particles confined to potentials that are both rotationally and time-reversal invariant. In particular, we focus on…

介观与纳米尺度物理 · 物理学 2011-03-08 Catherine J. Stevenson , Jordan Kyriakidis

Parton showers are among the most widely used tools in collider physics. Despite their key importance, none so far has been able to demonstrate accuracy beyond a basic level known as leading logarithmic (LL) order, with ensuing limitations…

高能物理 - 唯象学 · 物理学 2020-08-05 Mrinal Dasgupta , Frédéric A. Dreyer , Keith Hamilton , Pier Francesco Monni , Gavin P. Salam , Gregory Soyez

We reveal the direct link between the jet clustering algorithms recently proposed by Howard Georgi and parton shower kinematics, providing firm foundation from the theoretical side. The kinematics of this class of elegant algorithms is…

高能物理 - 唯象学 · 物理学 2015-06-11 Shao-Feng Ge

Structure functions of polarized spin-1 hadrons will be measured at various accelerator facilities in the near future. Recently, transverse-momentum-dependent and collinear parton distribution functions were theoretically proposed at twist…

高能物理 - 唯象学 · 物理学 2022-01-27 S. Kumano , Qin-Tao Song

The spin coherence phenomena and the possibility of their observation in nanomagnetic insulators attract more and more attention in the last several years. Recently it has been shown that in these systems in large transverse magnetic field…

介观与纳米尺度物理 · 物理学 2007-05-23 I. S. Tupitsyn

We extend the improved Collins-Soper-Sterman (iCSS) $W+Y$ construction recently presented in~\cite{Collins:2016hqq} to the case of polarized observables, where we focus in particular on the Sivers effect in semi-inclusive deep-inelastic…

高能物理 - 唯象学 · 物理学 2018-04-05 Leonard Gamberg , Andreas Metz , Daniel Pitonyak , Alexei Prokudin

For the first time, differential cross sections for the production of W-bosons in conjunction with up to three jets, computed at next-to leading order in QCD and including parton shower corrections, are presented and compared to recent…

高能物理 - 唯象学 · 物理学 2013-02-14 Stefan Hoeche , Frank Krauss , Marek Schonherr , Frank Siegert

We show how generalized energy correlation functions can be used as a powerful probe of jet substructure. These correlation functions are based on the energies and pair-wise angles of particles within a jet, with (N+1)-point correlators…

高能物理 - 唯象学 · 物理学 2015-06-15 Andrew J. Larkoski , Gavin P. Salam , Jesse Thaler

The projected energy correlator measures the energy deposited in multiple detectors as a function of the largest angular distance $x_L = (1 - \cos\chi_L)/2$ between detectors. The collinear limit $x_L\to 0$ of the projected energy…

高能物理 - 唯象学 · 物理学 2023-07-17 Wen Chen , Jun Gao , Yibei Li , Zhen Xu , Xiaoyuan Zhang , Hua Xing Zhu

We perform Monte Carlo simulations of 2-d dynamically triangulated surfaces coupled to Ising and three--states Potts model matter. By measuring spin-spin correlation functions as a function of the geodesic distance we provide substantial…

高能物理 - 格点 · 物理学 2009-10-28 J. Ambjorn , K. N. Anagnostopoulos , U. Magnea , G. Thorleifsson

Azimuthal correlations between the two jets with the largest transverse momenta $ {p_{\mathrm{T}}} $ in inclusive 2-, 3-, and 4-jet events are presented for several regions of the leading jet $ {p_{\mathrm{T}}} $ up to 4 TeV. For 3- and…

高能物理 - 实验 · 物理学 2018-07-12 CMS Collaboration

We present the matching of NLO QCD and NLO EW corrections to parton showers for vector-boson pair production at the LHC. We consider leptonic final states, including resonant and non-resonant diagrams, spin correlations and off-shell…

高能物理 - 唯象学 · 物理学 2020-09-24 Mauro Chiesa , Carlo Oleari , Emanuele Re

We outline a new formalism for dipole-type parton showers which maintain exact energy-momentum conservation at each step of the evolution. Particular emphasis is put on the coherence properties, the level at which recoil effects do enter…

高能物理 - 唯象学 · 物理学 2011-01-17 Simon Platzer , Stefan Gieseke

We introduce collinear drop jet substructure observables, which are unaffected by contributions from collinear radiation, and systematically probe soft radiation within jets. These observables can be designed to be either sensitive or…

高能物理 - 唯象学 · 物理学 2020-07-15 Yang-Ting Chien , Iain W. Stewart