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Coupled Linear Boltzmann Transport and hydrodynamics (CoLBT-hydro) is developed for co-current and event-by-event simulations of jet transport and jet-induced medium excitation (j.i.m.e.) in high-energy heavy-ion collisions. This is made…

Nuclear Theory · Physics 2017-12-14 Wei Chen , Shanshan Cao , Tan Luo , Long-Gang Pang , Xin-Nian Wang

Hadron production is investigated in proton-proton (pp) collisions at \surds = 7 TeV LHC energy - especially outside the cones of identified jets. We improved the original CDF definition of underlying event and introduce surrounding…

High Energy Physics - Phenomenology · Physics 2011-09-06 A. G. Agócs , G. G. Barnaföldi , P. Lévai

We present an extension to the Pythia Monte Carlo event generator that enables simulations of collisions between a generic hadron beam on a nuclear target with energy variation in event-by-event basis. This builds upon Pythia's module for…

High Energy Physics - Phenomenology · Physics 2024-11-25 Ilkka Helenius , Marius Utheim

Suppression of jet spectra or jet quenching in high-energy heavy-ion collisions is caused by jet energy loss in the dense medium. The azimuthal anisotropy of jet energy loss in non-central heavy-ion collisions can lead to jet anisotropy…

High Energy Physics - Phenomenology · Physics 2022-01-24 Yayun He , Wei Chen , Tan Luo , Shanshan Cao , Long-Gang Pang , Xin-Nian Wang

We present Monte-Carlo simulations of jet evolution in lead-lead collisions at the Large Hadron Collider (LHC) at CERN focusing on the dijet asymmetry measured by the ATLAS and CMS collaborations. In the simulation, hard partons are…

High Energy Physics - Phenomenology · Physics 2011-09-28 Clint Young , Sangyong Jeon , Charles Gale , Bjoern Schenke

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…

High Energy Physics - Experiment · Physics 2008-11-26 OPAL Collaboration , G. Abbiendi et al

We investigate the effects of saturation dynamics on midrapidity flow observables by adding fluctuating hotspots into the novel Monte Carlo EKRT (MC-EKRT) event generator for high-energy nuclear collisions. We demonstrate that the intensity…

High Energy Physics - Phenomenology · Physics 2024-07-02 Henry Hirvonen , Mikko Kuha , Jussi Auvinen , Kari J. Eskola , Yuuka Kanakubo , Harri Niemi

Reconstructed jets in heavy ion collisions are a crucial tool for understanding the quark-gluon plasma. The separation of jets from the underlying event is necessary particularly in central heavy ion reactions in order to quantify medium…

We report on event structure and double helicity asymmetry ($A_LL$) of jet production in longitudinally polarized p+p collisions at $\sqrt{s}$=200 GeV. Photons and charged particles were measured at midrapidity $|\eta| < 0.35$ with the…

High Energy Physics - Experiment · Physics 2011-08-09 A. Adare , S. Afanasiev , C. Aidala , N. N. Ajitanand , Y. Akiba , H. Al-Bataineh , J. Alexander , K. Aoki , L. Aphecetche , R. Armendariz , S. H. Aronson , J. Asai , E. T. Atomssa , R. Averbeck , T. C. Awes , B. Azmoun , V. Babintsev , G. Baksay , L. Baksay , A. Baldisseri , K. N. Barish , P. D. Barnes , B. Bassalleck , S. Bathe , S. Batsouli , V. Baublis , A. Bazilevsky , S. Belikov , R. Bennett , Y. Berdnikov , A. A. Bickley , J. G. Boissevain , H. Borel , K. Boyle , M. L. Brooks , H. Buesching , V. Bumazhnov , G. Bunce , S. Butsyk , S. Campbell , B. S. Chang , J. -L. Charvet , S. Chernichenko , J. Chiba , C. Y. Chi , M. Chiu , I. J. Choi , T. Chujo , P. Chung , A. Churyn , V. Cianciolo , C. R. Cleven , B. A. Cole , M. P. Comets , P. Constantin , M. Csanád , T. Csörgő , T. Dahms , K. Das , G. David , M. B. Deaton , K. Dehmelt , H. Delagrange , A. Denisov , D. d'Enterria , A. Deshpande , E. J. Desmond , O. Dietzsch , A. Dion , M. Donadelli , O. Drapier , A. Drees , A. K. Dubey , A. Durum , V. Dzhordzhadze , Y. V. Efremenko , J. Egdemir , F. Ellinghaus , W. S. Emam , A. Enokizono , H. En'yo , S. Esumi , K. O. Eyser , D. E. Fields , M. Finger , M. Finger , F. Fleuret , S. L. Fokin , Z. Fraenkel , J. E. Frantz , A. Franz , A. D. Frawley , K. Fujiwara , Y. Fukao , T. Fusayasu , S. Gadrat , I. Garishvili , A. Glenn , H. Gong , M. Gonin , J. Gosset , Y. Goto , R. Granier de Cassagnac , N. Grau , S. V. Greene , M. Grosse Perdekamp , T. Gunji , H. -Å. Gustafsson , T. Hachiya , A. Hadj Henni , C. Haegemann , J. S. Haggerty , H. Hamagaki , R. Han , H. Harada , E. P. Hartouni , K. Haruna , E. Haslum , R. Hayano , M. Heffner , T. K. Hemmick , T. Hester , X. He , H. Hiejima , J. C. Hill , R. Hobbs , M. Hohlmann , W. Holzmann , K. Homma , B. Hong , T. Horaguchi , D. Hornback , T. Ichihara , H. Iinuma , K. Imai , M. Inaba , Y. Inoue , D. Isenhower , L. Isenhower , M. Ishihara , T. Isobe , M. Issah , A. Isupov , B. V. Jacak , J. Jia , J. Jin , O. Jinnouchi , B. M. Johnson , K. S. Joo , D. Jouan , F. Kajihara , S. Kametani , N. Kamihara , J. Kamin , M. Kaneta , J. H. Kang , H. Kanou , D. Kawall , A. V. Kazantsev , A. Khanzadeev , J. Kikuchi , D. H. Kim , D. J. Kim , E. Kim , E. Kinney , Á. Kiss , E. Kistenev , A. Kiyomichi , J. Klay , C. Klein-Boesing , L. Kochenda , V. Kochetkov , B. Komkov , M. Konno , D. Kotchetkov , A. Kozlov , A. Král , A. Kravitz , J. Kubart , G. J. Kunde , N. Kurihara , K. Kurita , M. J. Kweon , Y. Kwon , G. S. Kyle , R. Lacey , Y. S. Lai , J. G. Lajoie , A. Lebedev , D. M. Lee , M. K. Lee , T. Lee , M. J. Leitch , M. A. L. Leite , B. Lenzi , T. Liška , A. Litvinenko , M. X. Liu , X. Li , B. Love , D. Lynch , C. F. Maguire , Y. I. Makdisi , A. Malakhov , M. D. Malik , V. I. Manko , Y. Mao , L. Mašek , H. Masui , F. Matathias , M. McCumber , P. L. McGaughey , Y. Miake , P. Mikeš , K. Miki , T. E. Miller , A. Milov , S. Mioduszewski , M. Mishra , J. T. Mitchell , M. Mitrovski , A. Morreale , D. P. Morrison , T. V. Moukhanova , D. Mukhopadhyay , J. Murata , S. Nagamiya , Y. Nagata , J. L. Nagle , M. Naglis , I. Nakagawa , Y. Nakamiya , T. Nakamura , K. Nakano , J. Newby , M. Nguyen , B. E. Norman , R. Nouicer , A. S. Nyanin , E. O'Brien , S. X. Oda , C. A. Ogilvie , H. Ohnishi , K. Okada , M. Oka , O. O. Omiwade , A. Oskarsson , M. Ouchida , K. Ozawa , R. Pak , D. Pal , A. P. T. Palounek , V. Pantuev , V. Papavassiliou , J. Park , W. J. Park , S. F. Pate , H. Pei , J. -C. Peng , H. Pereira , V. Peresedov , D. Yu. Peressounko , C. Pinkenburg , M. L. Purschke , A. K. Purwar , H. Qu , J. Rak , A. Rakotozafindrabe , I. Ravinovich , K. F. Read , S. Rembeczki , M. Reuter , K. Reygers , V. Riabov , Y. Riabov , G. Roche , A. Romana , M. Rosati , S. S. E. Rosendahl , P. Rosnet , P. Rukoyatkin , V. L. Rykov , B. Sahlmueller , N. Saito , T. Sakaguchi , S. Sakai , H. Sakata , V. Samsonov , S. Sato , S. Sawada , J. Seele , R. Seidl , V. Semenov , R. Seto , D. Sharma , I. Shein , A. Shevel , T. -A. Shibata , K. Shigaki , M. Shimomura , K. Shoji , A. Sickles , C. L. Silva , D. Silvermyr , C. Silvestre , K. S. Sim , C. P. Singh , V. Singh , S. Skutnik , M. Slunečka , A. Soldatov , R. A. Soltz , W. E. Sondheim , S. P. Sorensen , I. V. Sourikova , F. Staley , P. W. Stankus , E. Stenlund , M. Stepanov , A. Ster , S. P. Stoll , T. Sugitate , C. Suire , J. Sziklai , T. Tabaru , S. Takagi , E. M. Takagui , A. Taketani , Y. Tanaka , K. Tanida , M. J. Tannenbaum , A. Taranenko , P. Tarján , T. L. Thomas , M. Togawa , A. Toia , J. Tojo , L. Tomášek , H. Torii , R. S. Towell , V. -N. Tram , I. Tserruya , Y. Tsuchimoto , C. Vale , H. Valle , H. W. van Hecke , J. Velkovska , R. Vértesi , A. A. Vinogradov , M. Virius , V. Vrba , E. Vznuzdaev , M. Wagner , D. Walker , X. R. Wang , Y. Watanabe , J. Wessels , S. N. White , D. Winter , C. L. Woody , M. Wysocki , W. Xie , Y. L. Yamaguchi , A. Yanovich , Z. Yasin , J. Ying , S. Yokkaichi , G. R. Young , I. Younus , I. E. Yushmanov , W. A. Zajc , O. Zaudtke , C. Zhang , S. Zhou , J. Zimányi , L. Zolin

The first results from heavy ion collisions at the Large Hadron Collider for charged particle spectra and elliptic flow are compared to an event-by-event hybrid approach with an ideal hydrodynamic expansion. This approach has been shown to…

Nuclear Theory · Physics 2013-05-29 Hannah Petersen

Heavy quark production in multijet events at $e^+e^-$ colliders is studied at tree level. Total production rates are given and compared with the corresponding results for massless quarks. A new method of computing helicity amplitudes is…

High Energy Physics - Phenomenology · Physics 2009-09-25 Alessandro Ballestrero , Ezio Maina , Stefano Moretti

Recent observations of quark-gluon plasma (QGP) like signatures in high multiplicity proton-proton (pp) collisions, have compelled the heavy-ion physics community to re-examine small collision systems for proper baseline studies.…

High Energy Physics - Phenomenology · Physics 2025-02-11 Aswathy Menon Kavumpadikkal Radhakrishnan , Suraj Prasad , Sushanta Tripathy , Neelkamal Mallick , Raghunath Sahoo

The parton-to-hadron fragmentation functions (FFs) obtained from the YaJEM and PYTHIA6 Monte Carlo event generators, are studied for jets produced in a strongly-interacting medium and in the QCD "vacuum" respectively. The medium…

High Energy Physics - Phenomenology · Physics 2014-11-10 Redamy Pérez-Ramos , Thorsten Renk

A model for the production of large rapidity gaps being implemented in the Monte Carlo event generator PHOJET is discussed. In this model, high-mass diffraction dissociation exhibits properties similar to hadron production in…

High Energy Physics - Phenomenology · Physics 2007-05-23 F. W. Bopp , R. Engel , J. Ranft

One of the event shape observables, the transverse spherocity ($S_0$), has been studied successfully in small collision systems such as proton-proton collisions at the LHC as a tool to separate jetty and isotropic events. It has a unique…

High Energy Physics - Phenomenology · Physics 2021-10-11 Neelkamal Mallick , Raghunath Sahoo , Sushanta Tripathy , Antonio Ortiz

In ultra-relativistic heavy ion collisions at the LHC, each nucleus acts as a source of high-energy quasi-real photons that can participate in scattering processes without causing either participating nucleus to break up and emit forward…

Nuclear Experiment · Physics 2026-04-29 ATLAS Collaboration

The simple method for simulation of ``thermal'' hadron spectra in ultrarelativistic heavy ion collisions including longitudinal, transverse and elliptic flow is developed. The model is realized as fast Monte-Carlo event generator.

High Energy Physics - Phenomenology · Physics 2007-05-23 I. P. Lokhtin , A. M. Snigirev

A Monte Carlo event generator is constructed for a two-Higgs-doublet model with maximal CP symmetry, the MCPM. The model contains five physical Higgs bosons; the $\rho'$, behaving similarly to the standard-model Higgs boson, two extra…

High Energy Physics - Phenomenology · Physics 2015-06-11 J. Brehmer , V. Lendermann , M. Maniatis , O. Nachtmann , H. -C. Schultz-Coulon , R. Stamen

We study the impact of new set of cuts, proposed in our previous works, on the improvement of accuracy of the jet energy calibration with 'p p ->photon+Jet+X' process at LHC. Monte Carlo events produced by the PYTHIA 5.7 generator are used…

High Energy Physics - Experiment · Physics 2007-05-23 D. V. Bandurin , V. F. Konoplyanikov , N. B. Skachkov

We compute predictions for various low-transverse-momentum bulk observables in $\sqrt{s_{NN}} = 5.023$ TeV Pb+Pb collisions at the LHC from the event-by-event next-to-leading-order perturbative-QCD + saturation + viscous hydrodynamics…

High Energy Physics - Phenomenology · Physics 2016-02-03 H. Niemi , K. J. Eskola , R. Paatelainen , K. Tuominen