Related papers: Production and evolution path of dileptons at HADE…

Constraints on Kinetic Mixing of Dark Photons from Dilepton Spectra

Dark photons, the hypothetical gauge bosons associated with an additional $U(1)^{\prime}$ symmetry, can couple to Standard Model particles through a small kinetic mixing parameter $\varepsilon$ with the ordinary photon. This mechanism…

High Energy Physics - Phenomenology · Physics 2025-12-01 A. W. Romero Jorge , E. Bratkovskaya , T. Song , L. Sagunski

Search for anomalous production of prompt same-sign lepton pairs and pair-produced doubly charged Higgs bosons with $\sqrt{s} = 8$ TeV $pp$ collisions using the ATLAS detector

A low-background inclusive search for new physics in events with same-sign dileptons is presented. The search uses proton-proton collisions corresponding to 20.3 fb$^{-1}$ of integrated luminosity taken in 2012 at a centre-of-mass energy of…

High Energy Physics - Experiment · Physics 2015-03-17 ATLAS Collaboration

Investigating $^{238}$U Deformation via Dilepton Production in Relativistic Heavy-Ion Collisions

Due to their weak coupling to the strongly interacting matter produced in relativistic heavy-ion collisions, dileptons serve as a sensitive probe of the initial geometry of the colliding nuclei. In this study, we investigate the influence…

Nuclear Theory · Physics 2025-07-25 Wen-Hao Zhou , Lu-Meng Liu , Che Ming Ko , Kai-Jia Sun , Jun Xu

Dilepton anisotropy from $p + Be$ and $Ca + Ca$ collisions at BEVALAC energies

A full calculation of lepton-pair angular characteristics is carried out for $e^+e^-$ pairs created in $p + Be$ and $Ca + Ca$ collisions from 1.0 to 2.1 GeV/A. It is demonstrated that the dilepton decay anisotropy depends sensitively on the…

Nuclear Theory · Physics 2009-10-30 E. L. Bratkovskaya , W. Cassing , U. Mosel

Production and in-medium modification of $\phi$ mesons in proton-nucleus reactions from a transport approach

Production and in-medium modification of hidden strange $\phi$ mesons are studied in proton-nucleus reactions - p+C, p+Cu and p+Pb - at 12 GeV/c, partially measured by the KEK E325 collaboration via the dilepton decay mode. This work is…

High Energy Physics - Phenomenology · Physics 2024-08-29 Philipp Gubler , Masaya Ichikawa , Taesoo Song , Elena Bratkovskaya

$\Delta$ resonances in Ca+Ca, Ni+Ni and Au+Au reactions from 1 AGeV to 2 AGeV: Consistency between yields, mass shifts and decoupling temperatures

The Ultra-relativistic Quantum Molecular Dynamics (UrQMD) transport approach is used to calculate $\Delta$(1232) yields in Ca+Ca, Ni+Ni and Au+Au collisions between 1 AGeV and 2 AGeV. We compare and validate two different methods to extract…

Nuclear Theory · Physics 2021-02-03 Tom Reichert , Paula Hillmann , Marcus Bleicher

Study of the quasi-free $np \to np \pi^+\pi^-$ reaction with a deuterium beam at 1.25 GeV/nucleon

The tagged quasi-free $np \to np\pi^+\pi^-$ reaction has been studied experimentally with the High Acceptance Di-Electron Spectrometer (HADES) at GSI at a deuteron incident beam energy of 1.25 GeV/nucleon ($\sqrt s \sim$ 2.42 GeV/c for the…

Nuclear Experiment · Physics 2015-09-25 G. Agakishiev , A. Balanda , D. Belver , A. V. Belyaev , A. Blanco , M. Böhmer , J. L. Boyard , P. Braun-Munzinger , P. Cabanelas , E. Castro , S. Chernenko , T. Christ , M. Destefanis , J. Díaz , F. Dohrmann , A. Dybczak , L. Fabbietti , O. V. Fateev , P. Finocchiaro , P. Fonte , J. Friese , I. Fröhlich , T. Galatyuk , J. A. Garzón , R. Gernhäuser , A. Gil , C. Gilardi , K. Göbel , M. Golubeva , D. González-Díaz , F. Guber , M. Gumberidze , T. Hennino , R. Holzmann , A. Ierusalimov , I. Iori , A. Ivashkin , M. Jurkovic , B. Kämpfer , T. Karavicheva , D. Kirschner , I. Koenig , W. Koenig , B. W. Kolb , R. Kotte , F. Krizek , R. Krücken , W. Kühn , A. Kugler , A. Kurepin , A. Kurilkin , P. Kurilkin , V. Ladygin , S. Lang , J. S. Lange , K. Lapidus , T. Liu , L. Lopes , M. Lorenz , L. Maier , A. Mangiarotti , J. Markert , V. Metag , B. Michalska , J. Michel , E. Morinière , J. Mousa , C. Müntz , L. Naumann , J. Otwinowski , Y. C. Pachmayer , M. Palka , Y. Parpottas , V. Pechenov , O. Pechenova , J. Pietraszko , W. Przygoda , B. Ramstein , A. Reshetin , A. Rustamov , A. Sadovsky , P. Salabura , A. Schmah , E. Schwab , Yu. G. Sobolev , S. Spataro , B. Spruck , H. Ströbele , J. Stroth , C. Sturm , A. Tarantola , K. Teilab , P. Tlusty , M. Traxler , R. Trebacz , H. Tsertos , V. Wagner , T. Vasiliev , M. Weber , M. Wisniowski , T. Wojcik , J. Wüstenfeld , S. Yurevich , Y. Zanevsky , P. Zhou

Deuteron production in AuAu collisions at $\sqrt{s_{NN}} = 7-200$ GeV via pion catalysis

We study deuteron production using no-coalescence hydrodynamic + transport simulations of central AuAu collisions at $\sqrt{s_{NN}} = 7 - 200$ GeV. Deuterons are sampled thermally at the transition from hydrodynamics to transport, and…

High Energy Physics - Phenomenology · Physics 2021-04-02 Dmytro Oliinychenko , Chun Shen , Volker Koch

Measurements of Dielectron Production in Au$+$Au Collisions at $\sqrt{s_{NN}}$= 27, 39, and 62.4 GeV from the STAR Experiment

We report systematic measurements of dielectron ($e^{\pm}e^{\pm}$) invariant-mass $M_{ee}$ spectra at mid-rapidity in Au+Au collisions at $\sqrt{s_{NN}}$ = 27, 39, and 62.4 GeV taken with the STAR detector at the Relativistic Heavy Ion…

Nuclear Experiment · Physics 2018-10-25 STAR Collaboration , J. Adam , L. Adamczyk , J. R. Adams , J. K. Adkins , G. Agakishiev , M. M. Aggarwal , Z. Ahammed , I. Alekseev , D. M. Anderson , R. Aoyama , A. Aparin , D. Arkhipkin , E. C. Aschenauer , M. U. Ashraf , F. Atetalla , A. Attri , G. S. Averichev , X. Bai , V. Bairathi , K. Barish , A. J. Bassill , A. Behera , R. Bellwied , A. Bhasin , A. K. Bhati , J. Bielcik , J. Bielcikova , L. C. Bland , I. G. Bordyuzhin , J. D. Brandenburg , A. V. Brandin , D. Brown , J. Bryslawskyj , I. Bunzarov , J. Butterworth , H. Caines , M. Calderón de la Barca Sánchez , D. Cebra , I. Chakaberia , P. Chaloupka , B. K. Chan , F-H. Chang , Z. Chang , N. Chankova-Bunzarova , A. Chatterjee , S. Chattopadhyay , J. H. Chen , X. Chen , J. Cheng , M. Cherney , W. Christie , G. Contin , H. J. Crawford , M. Csanad , S. Das , T. G. Dedovich , I. M. Deppner , A. A. Derevschikov , L. Didenko , C. Dilks , X. Dong , J. L. Drachenberg , J. C. Dunlop , T. Edmonds , L. G. Efimov , N. Elsey , J. Engelage , G. Eppley , R. Esha , S. Esumi , O. Evdokimov , J. Ewigleben , O. Eyser , R. Fatemi , S. Fazio , P. Federic , J. Fedorisin , P. Filip , E. Finch , Y. Fisyak , C. E. Flores , L. Fulek , C. A. Gagliardi , T. Galatyuk , F. Geurts , A. Gibson , D. Grosnick , D. S. Gunarathne , Y. Guo , A. Gupta , W. Guryn , A. I. Hamad , A. Hamed , A. Harlenderova , J. W. Harris , L. He , S. Heppelmann , S. Heppelmann , N. Herrmann , A. Hirsch , L. Holub , Y. Hong , S. Horvat , B. Huang , H. Z. Huang , S. L. Huang , T. Huang , X. Huang , T. J. Humanic , P. Huo , G. Igo , W. W. Jacobs , A. Jentsch , J. Jia , K. Jiang , S. Jowzaee , X. Ju , E. G. Judd , S. Kabana , S. Kagamaster , D. Kalinkin , K. Kang , D. Kapukchyan , K. Kauder , H. W. Ke , D. Keane , A. Kechechyan , M. Kelsey , D. P. Kikoła , C. Kim , T. A. Kinghorn , I. Kisel , A. Kisiel , M. Kocan , L. Kochenda , L. K. Kosarzewski , A. F. Kraishan , L. Kramarik , L. Krauth , P. Kravtsov , K. Krueger , N. Kulathunga , L. Kumar , R. Kunnawalkam Elayavalli , J. Kvapil , J. H. Kwasizur , R. Lacey , J. M. Landgraf , J. Lauret , A. Lebedev , R. Lednicky , J. H. Lee , C. Li , W. Li , X. Li , Y. Li , Y. Liang , R. Licenik , J. Lidrych , T. Lin , A. Lipiec , M. A. Lisa , F. Liu , H. Liu , P. Liu , P. Liu , X. Liu , Y. Liu , Z. Liu , T. Ljubicic , W. J. Llope , M. Lomnitz , R. S. Longacre , S. Luo , X. Luo , G. L. Ma , L. Ma , R. Ma , Y. G. Ma , N. Magdy , R. Majka , D. Mallick , S. Margetis , C. Markert , H. S. Matis , O. Matonoha , J. A. Mazer , K. Meehan , J. C. Mei , N. G. Minaev , S. Mioduszewski , D. Mishra , B. Mohanty , M. M. Mondal , I. Mooney , Z. Moravcova , D. A. Morozov , Md. Nasim , K. Nayak , J. D. Negrete , J. M. Nelson , D. B. Nemes , M. Nie , G. Nigmatkulov , T. Niida , L. V. Nogach , T. Nonaka , G. Odyniec , A. Ogawa , K. Oh , S. Oh , V. A. Okorokov , D. Olvitt , B. S. Page , R. Pak , Y. Panebratsev , B. Pawlik , H. Pei , C. Perkins , R. L. Pinter , J. Pluta , J. Porter , M. Posik , N. K. Pruthi , M. Przybycien , J. Putschke , A. Quintero , S. K. Radhakrishnan , R. L. Ray , R. Reed , H. G. Ritter , J. B. Roberts , O. V. Rogachevskiy , J. L. Romero , L. Ruan , J. Rusnak , O. Rusnakova , N. R. Sahoo , P. K. Sahu , S. Salur , J. Sandweiss , J. Schambach , A. M. Schmah , W. B. Schmidke , N. Schmitz , B. R. Schweid , F. Seck , J. Seger , M. Sergeeva , R. Seto , P. Seyboth , N. Shah , E. Shahaliev , P. V. Shanmuganathan , M. Shao , F. Shen , W. Q. Shen , S. S. Shi , Q. Y. Shou , E. P. Sichtermann , S. Siejka , R. Sikora , M. Simko , J Singh , S. Singha , D. Smirnov , N. Smirnov , W. Solyst , P. Sorensen , H. M. Spinka , B. Srivastava , T. D. S. Stanislaus , D. J. Stewart , M. Strikhanov , B. Stringfellow , A. A. P. Suaide , T. Sugiura , M. Sumbera , B. Summa , X. M. Sun , Y. Sun , B. Surrow , D. N. Svirida , P. Szymanski , A. H. Tang , Z. Tang , A. Taranenko , T. Tarnowsky , J. H. Thomas , A. R. Timmins , D. Tlusty , T. Todoroki , M. Tokarev , C. A. Tomkiel , S. Trentalange , R. E. Tribble , P. Tribedy , S. K. Tripathy , O. D. Tsai , B. Tu , T. Ullrich , D. G. Underwood , I. Upsal , G. Van Buren , J. Vanek , A. N. Vasiliev , I. Vassiliev , F. Videbæk , S. Vokal , S. A. Voloshin , A. Vossen , F. Wang , G. Wang , P. Wang , Y. Wang , Y. Wang , J. C. Webb , L. Wen , G. D. Westfall , H. Wieman , S. W. Wissink , R. Witt , Y. Wu , Z. G. Xiao , G. Xie , W. Xie , J. Xu , N. Xu , Q. H. Xu , Y. F. Xu , Z. Xu , C. Yang , Q. Yang , S. Yang , Y. Yang , Z. Ye , Z. Ye , L. Yi , K. Yip , I. -K. Yoo , H. Zbroszczyk , W. Zha , D. Zhang , J. Zhang , L. Zhang , S. Zhang , S. Zhang , X. P. Zhang , Y. Zhang , Z. Zhang , J. Zhao , C. Zhong , C. Zhou , X. Zhu , Z. Zhu , M. K. Zurek , M. Zyzak

Subthreshold K+ Meson Production in Proton-Nucleus Reactions

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

Subthreshold antiproton production in pC, dC and $\alpha$C reactions

Data from KEK on subthreshold antiproton as well as on charged pion and kaon production in pC, dC and $\alpha$C reactions at energies between 3.5 and 12.0 A GeV are described for the first time within a unified approach. We use a model…

Nuclear Theory · Physics 2007-05-23 H. Mueller , V. I. Komarov

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

We present measurements of exclusive \pi^{+,0} and \eta\ production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy in hadron and dielectron channels. In the case of \pi^+ and \pi^0, high-statistics invariant-mass and angular…

Nuclear Experiment · Physics 2015-06-04 HADES Collaboration , G. Agakishiev , H. Alvarez-Pol , A. Balanda , R. Bassini , M. Böhmer , H. Bokemeyer , J. L. Boyard , P. Cabanelas , S. Chernenko , T. Christ , M. Destefanis , F. Dohrmann , A. Dybczak , T. Eberl , L. Fabbietti , O. Fateev , P. Finocchiaro , J. Friese , I. Fröhlich , T. Galatyuk , J. A. Garzón , R. Gernhäuser , C. Gilardi , M. Golubeva , D. González-Díaz , F. Guber , M. Gumberidze , T. Hennino , R. Holzmann , A. Ierusalimov , I. Iori , A. Ivashkin , M. Jurkovic , B. Kämpfer , K. Kanaki , T. Karavicheva , I. Koenig , W. Koenig , B. W. Kolb , R. Kotte , A. Kozuch , F. Krizek , W. Kühn , A. Kugler , A. Kurepin , S. Lang , K. Lapidus , T. Liu , L. Maier , J. Markert , V. Metag , B. Michalska , E. Morinière , J. Mousa , M. Münch , C. Müntz , L. Naumann , J. Otwinowski , Y. C. Pachmayer , V. Pechenov , O. Pechenova , T. Pérez Cavalcanti , J. Pietraszko , V. Pospísil , W. Przygoda , B. Ramstein , A. Reshetin , M. Roy-Stephan , A. Rustamov , A. Sadovsky , B. Sailer , P. Salabura , M. Sánchez , A. Schmah , E. Schwab , Yu. G. Sobolev , S. Spataro , B. Spruck , H. Ströbele , J. Stroth , C. Sturm , A. Tarantola , K. Teilab , P. Tlusty , A. Toia , M. Traxler , R. Trebacz , H. Tsertos , V. Wagner , M. Wisniowski , T. Wojcik , J. Wüstenfeld , S. Yurevich , Y. Zanevsky , P. Zumbruch

Excitation Spectra of the ${}^{12}{\rm C}(p,d)$ Reaction near the $\eta'$-Meson Emission Threshold Measured in Coincidence with High-Momentum Protons

The missing mass of the ${}^{12}{\rm C}(p,d)$ reaction has been measured near the $\eta'$-meson emission threshold in coincidence with a high-momentum proton to selectively collect $\eta'$-${}^{11}{\rm C}$ mesic nucleus formation events at…

Nuclear Experiment · Physics 2025-09-10 R. Sekiya , K. Itahashi , Y. K. Tanaka , S. Hirenzaki , N. Ikeno , V. Metag , M. Nanova , J. Yamagata-Sekihara , V. Drozd , H. Ekawa , H. Geissel , E. Haettner , A. Kasagi , E. Liu , M. Nakagawa , S. Purushothaman , C. Rappold , T. R. Saito , H. Alibrahim Alfaki , F. Amjad , M. Armstrong , K. -H. Behr , J. Benlliure , Z. Brencic , T. Dickel , S. Dubey , S. Escrig , M. Feijoo-Fontán , H. Fujioka , Y. Gao , F. Goldenbaum , A. Graña González , M. N. Harakeh , Y. He , H. Heggen , C. Hornung , N. Hubbard , M. Iwasaki , N. Kalantar-Nayestanaki , M. Kavatsyuk , E. Kazantseva , A. Khreptak , B. Kindler , H. Kollmus , D. Kostyleva , S. Kraft-Bermuth , N. Kurz , B. Lommel , S. Minami , D. J. Morrissey , P. Moskal , I. Mukha , C. Nociforo , H. J. Ong , S. Pietri , E. Rocco , J. L. Rodríguez-Sánchez , P. Roy , R. Ruber , S. Schadmand , C. Scheidenberger , P. Schwarz , V. Serdyuk , M. Skurzok , B. Streicher , K. Suzuki , B. Szczepanczyk , X. Tang , N. Tortorelli , M. Vencelj , T. Weber , H. Weick , M. Will , K. Wimmer , A. Yamamoto , A. Yanai , J. Zhao

Production of Eta-Mesons in 200 AGeV/c S+S and S+Au Reactions

Minimum Bias production cross sections of $\eta$ mesons have been measured in 200 AGeV/c S+Au and S+S collisions at the CERN SPS by reconstructing the $\eta \to \gamma\gamma$ decay. The measurements have been made over the rapidity range…

High Energy Physics - Experiment · Physics 2009-10-28 R. Albrecht , WA80-Collaboration

A coarse-graining approach for dilepton production at SPS energies

Coarse-grained output from transport calculations is used to determine thermal dilepton emission rates by applying medium-modified spectral functions from thermal quantum field theoretical models. By averaging over an ensemble of events…

Nuclear Theory · Physics 2015-05-27 Stephan Endres , Hendrik van Hees , Janus Weil , Marcus Bleicher

Analysis of dilepton production in Au+Au collisions at sqrt(s_NN)=200 GeV within the Parton-Hadron-String Dynamics (PHSD) transport approach

We address dilepton production in Au+Au collisions at sqrt(s_NN)=200 GeV by employing the parton-hadron-string dynamics (PHSD) off-shell transport approach. Within the PHSD one goes beyond the quasiparticle approximation by solving…

Nuclear Theory · Physics 2015-06-03 O. Linnyk , W. Cassing , J. Manninen , E. L. Bratkovskaya , C. M. Ko

High Momentum Dilepton Production from Jets in a Quark Gluon Plasma

We discuss the emission of high momentum lepton pairs in central Au+Au collisions at RHIC ($\sqrt{s_{NN}}=$200 GeV) and Pb+Pb collisions at the LHC ($\sqrt{s_{NN}}=$5500 GeV). Yields of dileptons produced through interactions of jets with…

High Energy Physics - Phenomenology · Physics 2008-11-26 Simon Turbide , Charles Gale , Dinesh K. Srivastava , Rainer J. Fries

Dilepton measurements with CERES

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

Investigation of the $\mathbf{\Sigma^{0}}$ Production Mechanism in p(3.5 GeV)+p Collisions

The production of $\Sigma^0$ hyperons in proton proton collisions at a beam kinetic energy of 3.5 GeV impinging on a liquid hydrogen target was investigated using data collected with the HADES setup. The total production cross section is…

Nuclear Experiment · Physics 2023-01-30 R. Abou Yassine , O. Arnold , M. Becker , P. Bergmann , A. Blanco , C. Blum , M. Böhmer , N. Carolino , L. Chlad , P. Chudoba , I. Ciepał , J. Dreyer , W. Esmail , L. Fabbietti , P. Fonte , J. Friese , I. Fröhlich , T. Galatyuk , J. A. Garzón , M. Grunwald , M. Gumberidze , S. Harabasz , C. Höhne , F. Hojeij , R. Holzmann , H. Huck , M. Idzik , B. Kämpfer , B. Kardan , V. Kedych , I. Koenig , W. Koenig , M. Kohls , J. Kolas , G. Korcyl , G. Kornakov , R. Kotte , W. Krueger , A. Kugler , T. Kunz , R. Lalik , F. Linz , L. Lopes , M. Lorenz , A. Malige , J. Markert , V. Metag , J. Michel , A. Molenda , C. Müntz , M. Nabroth , L. Naumann , K. Nowakowski , J. Orliński , J. -H. Otto , Y. Parpottas , M. Parschau , V. Pechenov , O. Pechenova , K. Piasecki , J. Pietraszko , A. Prozorov , W. Przygoda , B. Ramstein , N. Rathod , J. Ritman , A. Rost , A. Rustamov , P. Salabura , N. Schild , E. Schwab , F. Seck , U. Singh , S. Spies , M. Stefaniak , H. Ströbele , J. Stroth , C. Sturm , K. Sumara , O. Svoboda , M. Szala , P. Tlusty , M. Traxler , H. Tsertos , V. Wagner , A. A. Weber , C. Wendisch , H. P. Zbroszczyk , E. Zherebtsova , M. Zielinski , P. Zumbruch

$e^+e^-$ pairs from $\pi^-$A reactions

We present a dynamical study of $e^+e^-$ production in $\pi^-$A reactions at 1.3 and 1.7 GeV on the basis of the Coupled-Channel-BUU approach. The contributions from vector mesons ($\rho,\omega$) are calculated taking into account the…

Nuclear Theory · Physics 2009-10-30 Th. Weidmann , E. L. Bratkovskaya , W. Cassing , U. Mosel