Related papers: Measuring sigma(e^+e^- \to hadrons) using tagged p…

Measurements of Fragmentation Photons with the PHENIX Detector

Direct photons associated with jets provide a direct measurement of the effects of energy loss on the fragmentation of the parton as it propagates through the medium. Perturbative QCD calculations describe the direct photon cross section…

Nuclear Experiment · Physics 2019-08-13 Ali Hanks

Study of the reaction $e^+e^- \to \pi^0\gamma$ with the SND detector at the VEPP-2M collider

The process $e^+e^- \to \pi^0\gamma$ has been studied in the experiment with the SND detector at the VEPP-2M $e^+e^-$ collider. The $e^+e^- \to \pi^0\gamma$ cross section has been measured in the center-of-mass energy range from 0.60 to…

High Energy Physics - Experiment · Physics 2016-05-09 M. N. Achasov , K. I. Beloborodov , A. V. Berdyugin , A. G. Bogdanchikov , T. V. Dimova , V. P. Druzhinin , V. B. Golubev , I. A. Koop , A. A. Korol , S. V. Koshuba. E. V. Pakhtusova , S. I. Serednyakov , Yu. M. Shatunov , Z. K. Silagadze , A. N. Skrinsky , Yu. V. Usov , A. V. Vasiljev

Measurement of inclusive electron cross section in $\gamma \gamma$ collisions at TRISTAN

We have studied open charm production in $\gamma \gamma$ collisions with the TOPAZ detector at the TRISTAN $e^{+}e^{-}$ collider. In this study, charm quarks were identified by electrons (and positrons) from semi-leptonic decays of charmed…

High Energy Physics - Experiment · Physics 2010-11-01 M. Iwasaki

Direct measurement of photons from the electron-hadron bremsstrahlung at the EIC

Direct detection of bremsstrahlung photons, in principle, offers the most straightforward and most robust method of luminosity determination at the EIC, but requires an extraordinary performance of the photon detector. In this paper, we…

Instrumentation and Detectors · Physics 2025-10-08 L. Adamczyk , Y. Ali , J. J. Chwastowski , A. B. Kowalewska , B. Pawlik , K. Piotrzkowski , M. Przybycien

Observation of the h_c(1P) using e^+e^- collisions above DDbar threshold

Using 586pb^-1 of e^+e^- collision data at E_CM = 4170MeV, produced at the CESR collider and collected with the CLEO-c detector, we observe the process e^+e^- --> pi^+ pi^- h_c(1P). We measure its cross section to be 15.6+-2.3+-1.9+-3.0pb,…

High Energy Physics - Experiment · Physics 2011-09-01 CLEO Collaboration , T. K. Pedlar , D. Cronin-Hennessy , J. Hietala , S. Dobbs , Z. Metreveli , K. K. Seth , A. Tomaradze , T. Xiao , L. Martin , A. Powell , G. Wilkinson , H. Mendez , J. Y. Ge , D. H. Miller , I. P. J. Shipsey , B. Xin , G. S. Adams , D. Hu , B. Moziak , J. Napolitano , K. M. Ecklund , J. Insler , H. Muramatsu , C. S. Park , L. J. Pearson , E. H. Thorndike , S. Ricciardi , C. Thomas , M. Artuso , S. Blusk , R. Mountain , T. Skwarnicki , S. Stone , L. M. Zhang , G. Bonvicini , D. Cinabro , A. Lincoln , M. J. Smith , P. Zhou , J. Zhu , P. Naik , J. Rademacker , D. M. Asner , K. W. Edwards , K. Randrianarivony , G. Tatishvili , R. A. Briere , H. Vogel , P. U. E. Onyisi , J. L. Rosner , J. P. Alexander , D. G. Cassel , S. Das , R. Ehrlich , L. Gibbons , S. W. Gray , D. L. Hartill , B. K. Heltsley , D. L. Kreinick , V. E. Kuznetsov , J. R. Patterson , D. Peterson , D. Riley , A. Ryd , A. J. Sadoff , X. Shi , W. M. Sun , J. Yelton , P. Rubin , N. Lowrey , S. Mehrabyan , M. Selen , J. Wiss , J. Libby , M. Kornicer , R. E. Mitchell , M. R. Shepherd , C. M. Tarbert , D. Besson

Measurement of W-pair production in e+e- collisions at 189GeV

The production of W-pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 174.2 pb^-1. Cross sections are given for different topologies of W decays…

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

Measurement of Born cross section of $e^{+}e^{-}\rightarrow\Sigma^{+}\bar\Sigma^{-}$ at center-of-mass energies between 3.510 and 4.951 GeV

Using 24.1 fb$^{-1}$ of $e^{+}e^{-}$ collision data collected with the BESIII detector at the BEPCII collider, the Born cross sections and effective form factors of the $e^{+}e^{-}\rightarrow\Sigma^{+}\bar\Sigma^{-}$ reaction are measured.…

High Energy Physics - Experiment · Physics 2024-05-07 BESIII Collaboration , M. Ablikim , M. N. Achasov , P. Adlarson , O. Afedulidis , X. C. Ai , R. Aliberti , A. Amoroso , Q. An , Y. Bai , O. Bakina , I. Balossino , Y. Ban , H. -R. Bao , V. Batozskaya , K. Begzsuren , N. Berger , M. Berlowski , M. Bertani , D. Bettoni , F. Bianchi , E. Bianco , A. Bortone , I. Boyko , R. A. Briere , A. Brueggemann , H. Cai , X. Cai , A. Calcaterra , G. F. Cao , N. Cao , S. A. Cetin , J. F. Chang , G. R. Che , G. Chelkov , C. Chen , C. H. Chen , Chao Chen , G. Chen , H. S. Chen , H. Y. Chen , M. L. Chen , S. J. Chen , S. L. Chen , S. M. Chen , T. Chen , X. R. Chen , X. T. Chen , Y. B. Chen , Y. Q. Chen , Z. J. Chen , Z. Y. Chen , S. K. Choi , G. Cibinetto , F. Cossio , J. J. Cui , H. L. Dai , J. P. Dai , A. Dbeyssi , R. E. de Boer , D. Dedovich , C. Q. Deng , Z. Y. Deng , A. Denig , I. Denysenko , M. Destefanis , F. De Mori , B. Ding , X. X. Ding , Y. Ding , Y. Ding , J. Dong , L. Y. Dong , M. Y. Dong , X. Dong , M. C. Du , S. X. Du , Z. H. Duan , P. Egorov , Y. H. Fan , J. Fang , J. Fang , S. S. Fang , W. X. Fang , Y. Fang , Y. Q. Fang , R. Farinelli , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , J. H. Feng , Y. T. Feng , M. Fritsch , C. D. Fu , J. L. Fu , Y. W. Fu , H. Gao , X. B. Gao , Y. N. Gao , Yang Gao , S. Garbolino , I. Garzia , L. Ge , P. T. Ge , Z. W. Ge , C. Geng , E. M. Gersabeck , A. Gilman , K. Goetzen , L. Gong , W. X. Gong , W. Gradl , S. Gramigna , M. Greco , M. H. Gu , Y. T. Gu , C. Y. Guan , Z. L. Guan , A. Q. Guo , L. B. Guo , M. J. Guo , R. P. Guo , Y. P. Guo , A. Guskov , J. Gutierrez , K. L. Han , T. T. Han , X. Q. Hao , F. A. Harris , K. K. He , K. L. He , F. H. Heinsius , C. H. Heinz , Y. K. Heng , C. Herold , T. Holtmann , P. C. Hong , G. Y. Hou , X. T. Hou , Y. R. Hou , Z. L. Hou , B. Y. Hu , H. M. Hu , J. F. Hu , S. L. Hu , T. Hu , Y. Hu , G. S. Huang , K. X. Huang , L. Q. Huang , X. T. Huang , Y. P. Huang , T. Hussain , F. Hölzken , N Hüsken , N. in der Wiesche , J. Jackson , S. Janchiv , J. H. Jeong , Q. Ji , Q. P. Ji , W. Ji , X. B. Ji , X. L. Ji , Y. Y. Ji , X. Q. Jia , Z. K. Jia , D. Jiang , H. B. Jiang , P. C. Jiang , S. S. Jiang , T. J. Jiang , X. S. Jiang , Y. Jiang , J. B. Jiao , J. K. Jiao , Z. Jiao , S. Jin , Y. Jin , M. Q. Jing , X. M. Jing , T. Johansson , S. Kabana , N. Kalantar-Nayestanaki , X. L. Kang , X. S. Kang , M. Kavatsyuk , B. C. Ke , V. Khachatryan , A. Khoukaz , R. Kiuchi , O. B. Kolcu , B. Kopf , M. Kuessner , X. Kui , N. Kumar , A. Kupsc , W. Kühn , J. J. Lane , P. Larin , L. Lavezzi , T. T. Lei , Z. H. Lei , M. Lellmann , T. Lenz , C. Li , C. Li , C. H. Li , Cheng Li , D. M. Li , F. Li , G. Li , H. B. Li , H. J. Li , H. N. Li , Hui Li , J. R. Li , J. S. Li , Ke Li , L. J Li , L. K. Li , Lei Li , M. H. Li , P. R. Li , Q. M. Li , Q. X. Li , R. Li , S. X. Li , T. Li , W. D. Li , W. G. Li , X. Li , X. H. Li , X. L. Li , X. Z. Li , Xiaoyu Li , Y. G. Li , Z. J. Li , Z. X. Li , C. Liang , H. Liang , H. Liang , Y. F. Liang , Y. T. Liang , G. R. Liao , L. Z. Liao , J. Libby , A. Limphirat , C. C. Lin , D. X. Lin , T. Lin , B. J. Liu , B. X. Liu , C. Liu , C. X. Liu , F. H. Liu , Fang Liu , Feng Liu , G. M. Liu , H. Liu , H. B. Liu , H. M. Liu , Huanhuan Liu , Huihui Liu , J. B. Liu , J. Y. Liu , K. Liu , K. Y. Liu , Ke Liu , L. Liu , L. C. Liu , Lu Liu , M. H. Liu , P. L. Liu , Q. Liu , S. B. Liu , T. Liu , W. K. Liu , W. M. Liu , X. Liu , X. Liu , Y. Liu , Y. Liu , Y. B. Liu , Z. A. Liu , Z. D. Liu , Z. Q. Liu , X. C. Lou , F. X. Lu , H. J. Lu , J. G. Lu , X. L. Lu , Y. Lu , Y. P. Lu , Z. H. Lu , C. L. Luo , M. X. Luo , T. Luo , X. L. Luo , X. R. Lyu , Y. F. Lyu , F. C. Ma , H. Ma , H. L. Ma , J. L. Ma , L. L. Ma , M. M. Ma , Q. M. Ma , R. Q. Ma , X. T. Ma , X. Y. Ma , Y. Ma , Y. M. Ma , F. E. Maas , M. Maggiora , S. Malde , Y. J. Mao , Z. P. Mao , S. Marcello , Z. X. Meng , J. G. Messchendorp , G. Mezzadri , H. Miao , T. J. Min , R. E. Mitchell , X. H. Mo , B. Moses , N. Yu. Muchnoi , J. Muskalla , Y. Nefedov , F. Nerling , L. S. Nie , I. B. Nikolaev , Z. Ning , S. Nisar , Q. L. Niu , W. D. Niu , Y. Niu , S. L. Olsen , Q. Ouyang , S. Pacetti , X. Pan , Y. Pan , A. Pathak , P. Patteri , Y. P. Pei , M. Pelizaeus , H. P. Peng , Y. Y. Peng , K. Peters , J. L. Ping , R. G. Ping , S. Plura , V. Prasad , F. Z. Qi , H. Qi , H. R. Qi , M. Qi , T. Y. Qi , S. Qian , W. B. Qian , C. F. Qiao , X. K. Qiao , J. J. Qin , L. Q. Qin , L. Y. Qin , X. S. Qin , Z. H. Qin , J. F. Qiu , Z. H. Qu , C. F. Redmer , K. J. Ren , A. Rivetti , M. Rolo , G. Rong , Ch. Rosner , S. N. Ruan , N. Salone , A. Sarantsev , Y. Schelhaas , K. Schoenning , M. Scodeggio , K. Y. Shan , W. Shan , X. Y. Shan , Z. J Shang , J. F. Shangguan , L. G. Shao , M. Shao , C. P. Shen , H. F. Shen , W. H. Shen , X. Y. Shen , B. A. Shi , H. Shi , H. C. Shi , J. L. Shi , J. Y. Shi , Q. Q. Shi , S. Y. Shi , X. Shi , J. J. Song , T. Z. Song , W. M. Song , Y. J. Song , Y. X. Song , S. Sosio , S. Spataro , F. Stieler , Y. J. Su , G. B. Sun , G. X. Sun , H. Sun , H. K. Sun , J. F. Sun , K. Sun , L. Sun , S. S. Sun , T. Sun , W. Y. Sun , Y. Sun , Y. J. Sun , Y. Z. Sun , Z. Q. Sun , Z. T. Sun , C. J. Tang , G. Y. Tang , J. Tang , Y. A. Tang , L. Y. Tao , Q. T. Tao , M. Tat , J. X. Teng , V. Thoren , W. H. Tian , Y. Tian , Z. F. Tian , I. Uman , Y. Wan , S. J. Wang , B. Wang , B. L. Wang , Bo Wang , D. Y. Wang , F. Wang , H. J. Wang , J. J. Wang , J. P. Wang , K. Wang , L. L. Wang , M. Wang , Meng Wang , N. Y. Wang , S. Wang , S. Wang , T. Wang , T. J. Wang , W. Wang , W. Wang , W. P. Wang , X. Wang , X. F. Wang , X. J. Wang , X. L. Wang , X. N. Wang , Y. Wang , Y. D. Wang , Y. F. Wang , Y. L. Wang , Y. N. Wang , Y. Q. Wang , Yaqian Wang , Yi Wang , Z. Wang , Z. L. Wang , Z. Y. Wang , Ziyi Wang , D. H. Wei , F. Weidner , S. P. Wen , Y. R. Wen , U. Wiedner , G. Wilkinson , M. Wolke , L. Wollenberg , C. Wu , J. F. Wu , L. H. Wu , L. J. Wu , X. Wu , X. H. Wu , Y. Wu , Y. H. Wu , Y. J. Wu , Z. Wu , L. Xia , X. M. Xian , B. H. Xiang , T. Xiang , D. Xiao , G. Y. Xiao , S. Y. Xiao , Y. L. Xiao , Z. J. Xiao , C. Xie , X. H. Xie , Y. Xie , Y. G. Xie , Y. H. Xie , Z. P. Xie , T. Y. Xing , C. F. Xu , C. J. Xu , G. F. Xu , H. Y. Xu , M. Xu , Q. J. Xu , Q. N. Xu , W. Xu , W. L. Xu , X. P. Xu , Y. C. Xu , Z. P. Xu , Z. S. Xu , F. Yan , L. Yan , W. B. Yan , W. C. Yan , X. Q. Yan , H. J. Yang , H. L. Yang , H. X. Yang , Tao Yang , Y. Yang , Y. F. Yang , Y. X. Yang , Yifan Yang , Z. W. Yang , Z. P. Yao , M. Ye , M. H. Ye , J. H. Yin , Z. Y. You , B. X. Yu , C. X. Yu , G. Yu , J. S. Yu , T. Yu , X. D. Yu , Y. C. Yu , C. Z. Yuan , J. Yuan , L. Yuan , S. C. Yuan , Y. Yuan , Y. J. Yuan , Z. Y. Yuan , C. X. Yue , A. A. Zafar , F. R. Zeng , S. H. Zeng , X. Zeng , Y. Zeng , Y. J. Zeng , X. Y. Zhai , Y. C. Zhai , Y. H. Zhan , A. Q. Zhang , B. L. Zhang , B. X. Zhang , D. H. Zhang , G. Y. Zhang , H. Zhang , H. Zhang , H. C. Zhang , H. H. Zhang , H. H. Zhang , H. Q. Zhang , H. R. Zhang , H. Y. Zhang , J. Zhang , J. Zhang , J. J. Zhang , J. L. Zhang , J. Q. Zhang , J. S. Zhang , J. W. Zhang , J. X. Zhang , J. Y. Zhang , J. Z. Zhang , Jianyu Zhang , L. M. Zhang , Lei Zhang , P. Zhang , Q. Y. Zhang , R. Y. Zhang , Shuihan Zhang , Shulei Zhang , X. D. Zhang , X. M. Zhang , X. Y. Zhang , Y. Zhang , Y. T. Zhang , Y. H. Zhang , Y. M. Zhang , Yan Zhang , Yao Zhang , Z. D. Zhang , Z. H. Zhang , Z. L. Zhang , Z. Y. Zhang , Z. Y. Zhang , Z. Z. Zhang , G. Zhao , J. Y. Zhao , J. Z. Zhao , Lei Zhao , Ling Zhao , M. G. Zhao , N. Zhao , R. P. Zhao , S. J. Zhao , Y. B. Zhao , Y. X. Zhao , Z. G. Zhao , A. Zhemchugov , B. Zheng , B. M. Zheng , J. P. Zheng , W. J. Zheng , Y. H. Zheng , B. Zhong , X. Zhong , H. Zhou , J. Y. Zhou , L. P. Zhou , S. Zhou , X. Zhou , X. K. Zhou , X. R. Zhou , X. Y. Zhou , Y. Z. Zhou , J. Zhu , K. Zhu , K. J. Zhu , K. S. Zhu , L. Zhu , L. X. Zhu , S. H. Zhu , S. Q. Zhu , T. J. Zhu , W. D. Zhu , Y. C. Zhu , Z. A. Zhu , J. H. Zou , J. Zu

Determination of the LEP center-of-mass energy from Zgamma events

Radiative returns to the Z resonance (Zgamma events) provide a method to determine the centre-of-mass energy of the high energy e+e- colliders and already at LEP2. The method is applied for the data collected with the ALEPH detector in 1997…

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

First insight into transverse-momentum-dependent fragmentation physics at photon-photon colliders

Future planned lepton colliders, both in the circular and linear configurations, can effectively work as virtual and quasi-real photon-photon colliders and are expected to stimulate an intense physics program in the next few years. In this…

High Energy Physics - Phenomenology · Physics 2025-04-18 Simone Anedda , Francesco Murgia , Cristian Pisano

Measurements of low energy e+e- hadronic cross sections and implications for the muon g-2

Numerous channels of the cross section e+e- --> hadrons have been measured by the BABAR experiment using the ISR method. For the pi+pi-(gamma) and K+K-(gamma) channels, BABAR has pioneered the method based on the ratio between the hadronic…

High Energy Physics - Experiment · Physics 2014-07-18 B. Malaescu

High Energy Photon-Photon Collisions -

The collisions of high energy photons produced at an electron-positron collider provide a comprehensive laboratory for testing QCD, electroweak interactions, and extensions of the Standard Model. The luminosity and energy of the colliding…

High Energy Physics - Phenomenology · Physics 2009-09-25 Stanley J. Brodsky , SLAC , Peter M. Zerwas , DESY

Multi-Photon Production in e+e- collisions at sqrt(s) = 181 - 209 GeV

The process e+e- -> gamma gamma (gamma) is studied using data collected by the OPAL detector at LEP between the years 1997 and 2000. The data set corresponds to an integrated luminosity of 672.3pb-1 at centre-of-mass energies lying between…

High Energy Physics - Experiment · Physics 2008-11-07 The OPAL collaboration , G. Abbiendi

Observing true tauonium via two-photon fusion at $e^+e^-$ and hadron colliders

The feasibility of observing true tauonium, the bound state of two tau leptons, $\mathcal{T}_0\equiv(\tau^+\tau^-)_0$, via photon-photon collisions at $e^+e^-$ colliders and at the LHC, is studied. The production cross sections of the…

High Energy Physics - Phenomenology · Physics 2022-05-25 David d'Enterria , Hua-Sheng Shao

$\gamma \gamma$ cross-sections and $\gamma \gamma$ colliders

We summarize the predictions of different models for total $\gamma \gamma$ cross-sections. The experimentaly observed rise of $\sigma_{\gamma \gamma}$ with $\sqrt{s_{\gamma \gamma}}$, faster than that for $\sigma_{\bar p p}$,…

High Energy Physics - Phenomenology · Physics 2009-11-07 Rohini M. Godbole , G. Pancheri

Measurement of the $e^+e^-\to\pi^+\pi^-\pi^0$ cross section in the energy region from 0.56 to 1.1 GeV with the SND detector

The precise measurement of the $e^+e^-\to\pi^+\pi^-\pi^0$ cross section is performed in the center-of-mass energy range $E = 560$--1100 MeV using a data sample of 66 pb$^{-1}$ collected in the experiment with the SND detector at the…

High Energy Physics - Experiment · Physics 2026-03-06 SND Collaboration , M. N. Achasov , A. E. Alizzi , A. Yu. Barnyakov , K. I. Beloborodov , A. V. Berdyugin , D. E. Berkaev , A. G. Bogdanchikov , A. A. Botov , V. S. Denisov , T. V. Dimova , V. P. Druzhinin , R. A. Efremov , E. A. Eminov , L. B. Fomin , L. V. Kardapoltsev , A. A. Kattsin , A. G. Kharlamov , I. A. Koop , A. A. Korol , D. P. Kovrizhin , A. S. Kupich , A. P. Kryukov , N. A. Melnikova , N. Yu. Muchnoi , A. E. Obrazovsky , A. A. Oorzhak , I. V. Ovtin , E. V. Pakhtusova , E. A. Perevedentsev , I. A. Polomoshnov , K. V. Pugachev , Yu. A. Rogovsky , V. A. Romanov , S. I. Serednyakov , Yu. M. Shatunov , D. A. Shtol , Z. K. Silagadze , K. D. Sungurov , M. V. Timoshenko , I. K. Surin , Yu. V. Usov , I. M. Zemlyansky , V. N. Zhabin , Yu. M. Zharinov , V. V. Zhulanov , P. V. Zhulanova

Azimuthal correlations of high-pT photons and hadrons in Au+Au collisions at RHIC

The measurement of gamma+jet events with a direct photon in coincidence with an energetic parton can provide unique insights into the propagation and fragmentation of the parton in the presence of the hot and dense medium created in…

Nuclear Experiment · Physics 2019-08-14 Thomas Dietel

Signals of a superlight gravitino at e^+ e^- colliders when the other superparticles are heavy

If the gravitino G is very light and all the other supersymmetric particles are above threshold, supersymmetry may still be found at colliders, by looking at processes with only gravitinos and ordinary particles in the final state. We…

High Energy Physics - Phenomenology · Physics 2009-10-30 Andrea Brignole , Ferruccio Feruglio , Fabio Zwirner

A method for computing hadron-nucleus cross sections in fully active sampling calorimetric targets

Interaction cross section measurements in fixed-target scattering experiments are typically performed by measuring the attenuation of a beam of particles that is incident upon a target slab of material. A fully active sampling calorimeter,…

Instrumentation and Detectors · Physics 2022-09-30 Johnny Ho , David W. Schmitz

Two particle correlations: a probe of the LHC QCD medium

The properties of $\gamma$--jet pairs emitted in heavy-ion collisions provide an accurate mean to perform a tomographic measurement of the medium created in the collision through the study of the medium modified jet properties. The idea is…

High Energy Physics - Experiment · Physics 2019-08-13 Yaxian Mao

Status and Prospectives of Hadronic Cross Section at Low Energy

In this talk I will review the experimental status and the prospects for the future of $\sigma(e^+ e^- \to hadrons)$ at low energy. The recent preliminary results obtained by KLOE and BABAR collaborations using the radiative return will be…

High Energy Physics - Experiment · Physics 2007-05-23 Graziano Venanzoni