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By employing the Gubser solutions of causal relativistic second-order Israel-Stewart hydrodynamics, we study the thermal dilepton production from heavy-ion collisions, considering the transverse expansion of the viscous hot QCD medium along…

High Energy Physics - Phenomenology · Physics 2025-06-23 Lakshmi J. Naik , V. Sreekanth

In this letter, the production of deuterons and anti-deuterons in pp collisions at $\sqrt{s} = 7$ TeV is studied as a function of the charged-particle multiplicity density at mid-rapidity with the ALICE detector at the LHC. Production…

Nuclear Experiment · Physics 2019-11-11 ALICE Collaboration

We consider dilepton production in high energy proton-nucleus (and very forward nucleus-nucleus) collisions. Treating the target nucleus as a Color Glass Condensate and describing the projectile proton (nucleus) as a collection of quarks…

High Energy Physics - Phenomenology · Physics 2010-11-30 F. Gelis , Jamal Jalilian-Marian

In total 1317 di-lepton events with significant missing transverse momentum were identified in a total data sample of 680 pb-1 collected at e+e- centre-of-mass energies ranging from 183 GeV to 209 GeV. The number of di-lepton events, the…

High Energy Physics - Experiment · Physics 2008-11-26 The OPAL collaboration , G. Abbiendi

The production of Like-Sign-Di-leptons (LSD), in the high energy lepton number violating ($\Delta L = +2$) reaction, p p --> 2jets + l+l+ (l=e,\mu,\tau) of interest for the experiments to be performed at the forthcoming Large Hadron…

High Energy Physics - Phenomenology · Physics 2009-10-31 O. Panella , C. Carimalo , Y. N. Srivastava

We discuss the latest theoretical results on direct photon and dilepton production from relativistic heavy-ion collisions. While the dilepton spectra at low invariant mass show in-medium effects like a collisional broadening of the vector…

High Energy Physics - Phenomenology · Physics 2015-06-22 E. L. Bratkovskaya

The NA49 experiment has collected comprehensive data on particle production in nucleus-nucleus collisions over the whole SPS beam energies range, the critical energy domain where the expected phase transition to a deconfined phase is…

Nuclear Experiment · Physics 2019-08-14 G. L. Melkumov

The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high energy hadronic collisions. In this paper the production of (anti-)deuterons is…

Nuclear Experiment · Physics 2021-02-08 ALICE Collaboration

We report on dilepton measurements for central Pb on Au collisions at the top CERN SPS energy with the upgraded CERES experiment. The dilepton mass spectrum of 2000 data with improved mass resolution shows an enhancement over the…

Nuclear Experiment · Physics 2009-04-14 A. Marin , for CERES Collaboration

Results obtained with the HADES dielectron spectrometer at GSI are discussed, with emphasis on dilepton production in elementary reactions.

Nuclear Experiment · Physics 2010-05-25 B. Ramstein

The inclusive K+ mesons production in proton-nucleus collisions in the near threshold and subthreshold energy regimes is analyzed with respect to the one-step (pN->K+YN, Y=Lambda,Sigma) and the two-step (pN->NNpi, NN2pi; piN->K+Y)…

Nuclear Theory · Physics 2009-10-30 S. V. Efremov , E. Ya. Paryev

We report measurements of electron pair production in elementary p+p and d+p reactions at 1.25 GeV/u with the HADES spectrometer. For the first time, the electron pairs were reconstructed for n+p reactions by detecting the proton spectator…

Inclusive e$^+$e$^-$ production has been studied with HADES in $\pi^-$ + p, $\pi^-$ + C and $\pi^- + \mathrm{CH}_2$ reactions, using the GSI pion beam at $\sqrt{s_{\pi p}}$ = 1.49 GeV. Invariant mass and transverse momentum distributions…

Nuclear Experiment · Physics 2023-09-26 R. Abou Yassine , J. Adamczewski-Musch , O. Arnold , E. T. Atomssa , M. Becker , C. Behnke , J. C. Berger-Chen , A. Blanco , C. Blume , M. Böhmer , L. Chlad , P. Chudoba , I. Ciepał , S. Deb , C. Deveaux , D. Dittert , J. Dreyer , E. Epple , L. Fabbietti , P. Fonte , C. Franco , J. Friese , I. Fröhlich , J. Förtsch , T. Galatyuk , J. A. Garzón , R. Gernhäuser , R. Greifenhagen , M. Grunwald , M. Gumberidze , S. Harabasz , T. Heinz , T. Hennino , C. Höhne , F. Hojeij , R. Holzmann , M. Idzik , B. Kämpfer , K-H. Kampert , B. Kardan , V. Kedych , I. Koenig , W. Koenig , M. Kohls , J. Kolas , B. W. Kolb , G. Korcyl , G. Kornakov , R. Kotte , W. Krueger , A. Kugler , T. Kunz , R. Lalik , K. Lapidus , S. Linev , F. Linz , L. Lopes , M. Lorenz , T. Mahmoud , L. Maier , A. Malige , J. Markert , S. Maurus , V. Metag , J. Michel , D. M. Mihaylov , V. Mikhaylov , A. Molenda , C. Müntz , R. Münzer , M. Nabroth , L. Naumann , K. Nowakowski , J. Orliński , J. -H. Otto , Y. Parpottas , M. Parschau , C. Pauly , V. Pechenov , O. Pechenova , K. Piasecki , J. Pietraszko , T. Povar , P. Prościnki , A. Prozorov , W. Przygoda , K. Pysz , B. Ramstein , N. Rathod , P. Rodriguez-Ramos , A. Rost , A. Rustamov , P. Salabura , T. Scheib , N. Schild , K. Schmidt-Sommerfeld , H. Schuldes , E. Schwab , F. Scozzi , F. Seck , P. Sellheim , J. Siebenson , L. Silva , U. Singh , J. Smyrski , S. Spataro , S. Spies , M. Stefaniak , H. Ströbele , J. Stroth , C. Sturm , K. Sumara , O. Svoboda , M. Szala , P. Tlusty , M. Traxler , H. Tsertos , O. Vazquez-Doce , V. Wagner , A. A. Weber , C. Wendisch , M. G. Wiebusch , J. Wirth , A Wladyszewska , H. P. Zbroszczyk , E. Zherebtsova , M. Zielinski , P. Zumbruch

We examine a new mechanism of $e^+e^-$ pair production in $NN$ collisions associated with the $NN$-decoupled dibaryon $d^\star_1$(1956) formation in the process $NN \to \gamma^\star d^\star_1$, where $\gamma^\star$ is the virtual photon…

Nuclear Theory · Physics 2015-05-20 Anatoliy S. Khrykin

This paper presents single lepton and dilepton kinematic distributions measured in dileptonic $t\bar{t}$ events produced in 20.2 fb$^{-1}$ of $\sqrt{s}=8$ TeV $pp$ collisions recorded by the ATLAS experiment at the LHC. Both absolute and…

High Energy Physics - Experiment · Physics 2017-12-01 ATLAS Collaboration

A search for events containing two or more high-transverse-momentum isolated leptons has been performed in ep collisions with the ZEUS detector at HERA using the full collected data sample, corresponding to an integrated luminosity of 480…

High Energy Physics - Experiment · Physics 2012-08-27 ZEUS Collaboration

Dilepton production associated with minijets is calculated in ultrarelativistic heavy ion collisions using the first order approximation of the dilepton fragmentation functions of quarks and gluons. The full QCD evolution of the…

Nuclear Theory · Physics 2009-10-22 K. J. Eskola , Xin-Nian Wang

A measurement of $\textit{W}$ boson production in lead-lead collisions at $\sqrt{s_{\mathrm{NN}}}=$2.76 TeV is presented. It is based on the analysis of data collected with the ATLAS detector at the LHC in 2011 corresponding to an…

High Energy Physics - Experiment · Physics 2015-01-27 ATLAS Collaboration

Dilepton production in heavy-ion collisions at top SPS energy is investigated within a coarse-graining approach that combines an underlying microscopic evolution of the nuclear reaction with the application of medium-modified spectral…

Nuclear Theory · Physics 2015-07-07 Stephan Endres , Hendrik van Hees , Janus Weil , Marcus Bleicher

Utilizing a coarse-graining method to convert hadronic transport simulations of Au+Au collisions at SIS energies into local temperature, baryon and pion densities, we compute the pertinent radiation of thermal dileptons based on an…

Nuclear Theory · Physics 2016-05-19 Tetyana Galatyuk , Paul M. Hohler , Ralf Rapp , Florian Seck , Joachim Stroth