Related papers: Study of QED processes e+ e- --> e+ e- gamma, e+ e…

Measurement of the $e^+e^-\to\pi^+\pi^-$ cross section from threshold to 1.2 GeV with the CMD-3 detector

The cross section of the process $e^+e^-\to\pi^+\pi^-$ has been measured in the center of mass energy range from 0.32 to 1.2 GeV with the CMD-3 detector at the electron-positron collider VEPP-2000. The measurement is based on a full dataset…

High Energy Physics - Experiment · Physics 2024-06-06 3 Collaboration , F. V. Ignatov , R. R. Akhmetshin , A. N. Amirkhanov , A. V. Anisenkov , V. M. Aulchenko , N. S. Bashtovoy , D. E. Berkaev , A. E. Bondar , A. V. Bragin , S. I. Eidelman , D. A. Epifanov , L. B. Epshteyn , A. L. Erofeev , G. V. Fedotovich , A. O. Gorkovenko , F. J. Grancagnolo , A. A. Grebenuk , S. S. Gribanov , D. N. Grigoriev , V. L. Ivanov , S. V. Karpov , A. S. Kasaev , V. F. Kazanin , B. I. Khazin , A. N. Kirpotin , I. A. Koop , A. A. Korobov , A. N. Kozyrev , E. A. Kozyrev , P. P. Krokovny , A. E. Kuzmenko , A. S. Kuzmin , I. B. Logashenko , P. A. Lukin , A. P. Lysenko , K. Yu. Mikhailov , I. V. Obraztsov , V. S. Okhapkin , A. V. Otboev , E. A. Perevedentsev , Yu. N. Pestov , A. S. Popov , G. P. Razuvaev , Yu. A. Rogovsky , A. A. Ruban , N. M. Ryskulov , A. E. Ryzhenenkov , A. V. Semenov , A. I. Senchenko , P. Yu. Shatunov , Yu. M. Shatunov , V. E. Shebalin , D. N. Shemyakin , B. A. Shwartz , D. B. Shwartz , A. L. Sibidanov , E. P. Solodov , A. A. Talyshev , M. V. Timoshenko , V. M. Titov , S. S. Tolmachev , A. I. Vorobiov , I. M. Zemlyansky , D. S. Zhadan , Yu. M. Zharinov , A. S. Zubakin , Yu. V. Yudin

Differential cross section of gamma n to K+ Sigma- on bound neutrons with incident photons from 1.1 to 3.6 GeV

Differential cross sections of the reaction gamma d to K+ Sigma- (p) have been measured with the CLAS detector at Jefferson Lab using incident photons with energies between 1.1 and 3.6 GeV. This is the first complete set of strangeness…

Nuclear Experiment · Physics 2019-08-13 S. Anefalos Pereira , M. Mirazita , P. Rossi , E. De Sanctis , G. Niculescu , I. Niculescu , S. Stepanyan

Search for the radiative decay $\eta \to \pi^0 \gamma \gamma$ in the SND experiment at VEPP-2M

The $\eta \to \pi^0 \gamma \gamma$ decay was investigated by the SND detector at VEPP-2M $e^+e^-$ collider in the reaction $e^+e^-\to\phi\to \eta\gamma$. Here we present the results and some details of this study. We report an upper limit…

High Energy Physics - Experiment · Physics 2008-11-26 M. N. Achasov , K. I. Beloborodov , A. V. Berdyugin , A. V. Bozhenok , A. G. Bogdanchikov , D. A. Bukin , S. V. Burdin , T. V. Dimova , A. A. Drozdetsky , V. P. Druzhinin , D. I. Ganyushin , V. B. Golubev , V. N. Ivanchenko , I. A. Koop , A. A. Korol , S. V. Koshuba , A. V. Otboev , E. V. Pakhtusova , A. A. Salnikov , V. V. Shary , S. I. Serednyakov , Yu. M. Shatunov , V. A. Sidorov , Z. K. Silagadze , A. G. Skripkin , A. A. Valishev , A. V. Vasiljev , Yu. S. Velikzhanin

Precise measurement of $R_{\text{uds}}$ and $R$ between 1.84 and 3.72 GeV at the KEDR detector

The present work continues a series of the KEDR measurements of the $R$ value that started in 2010 at the VEPP-4M $e^+e^-$ collider. By combining new data with our previous results in this energy range we measured the values of…

High Energy Physics - Experiment · Physics 2018-11-14 V. V. Anashin , O. V. Anchugov , V. M. Aulchenko , E. M. Baldin , G. N. Baranov , A. K. Barladyan , A. Yu. Barnyakov , M. Yu. Barnyakov , S. E. Baru , I. Yu. Basok , A. M. Batrakov , E. A. Bekhtenev , A. E. Blinov , V. E. Blinov , A. V. Bobrov , V. S. Bobrovnikov , A. V. Bogomyagkov , A. E. Bondar , A. R. Buzykaev , P. B. Cheblakov , V. L. Dorohov , S. I. Eidelman , D. N. Grigoriev , S. A. Glukhov , V. V. Kaminskiy , S. E. Karnaev , G. V. Karpov , S. V. Karpov , K. Yu. Karukina , D. P. Kashtankin , P. V. Kasyanenko , T. A. Kharlamova , V. A. Kiselev , V. V. Kolmogorov , S. A. Kononov , K. Yu. Kotov , A. A. Krasnov , E. A. Kravchenko , V. N. Kudryavtsev , V. F. Kulikov , G. Ya. Kurkin , I. A. Kuyanov , E. B. Levichev , D. A. Maksimov , V. M. Malyshev , A. L. Maslennikov , O. I. Meshkov , S. I. Mishnev , I. A. Morozov , I. I. Morozov , S. A. Nikitin , I. B. Nikolaev , I. N. Okunev , A. P. Onuchin , S. B. Oreshkin , A. A. Osipov , I. V. Ovtin , S. V. Peleganchuk , S. G. Pivovarov , P. A. Piminov , V. V. Petrov , V. G. Prisekin , O. L. Rezanova , A. A. Ruban , G. A. Savinov , A. G. Shamov , D. N. Shatilov , D. A. Shvedov , B. A. Shwartz , E. A. Simonov , S. V. Sinyatkin , A. N. Skrinsky , A. V. Sokolov , D. P. Sukhanov , A. M. Sukharev , E. V. Starostina , A. A. Talyshev , V. A. Tayursky , V. I. Telnov , Yu. A. Tikhonov , K. Yu. Todyshev , A. G. Tribendis , G. M. Tumaikin , Yu. V. Usov , A. I. Vorobiov , V. N. Zhilich , A. A. Zhukov , V. V. Zhulanov , A. N. Zhuravlev

Measurement of e+e- -> pi+pi- cross section with CMD-2 around rho-meson

The cross section of the process e+e- -> pi+pi- has been measured using about 114000 events collected by the CMD-2 detector at the VEPP-2M e+e- collider in the center-of-mass energy range from 0.61 to 0.96 GeV. Results of the pion form…

High Energy Physics - Experiment · Physics 2008-11-26 2 collaboration

Latest studies on the reaction e+ e- --> K + K- gamma

Recent theoretical studies of the e+ e- --> K + K- gamma process are described. Three main reaction mechanisms are considered: the initial state radiation, the final state radiation and the strong interaction between the outgoing K+ K-…

High Energy Physics - Phenomenology · Physics 2018-10-24 Leonard Lesniak , Michal Silarski

Study of the process $e^+ e^- \to K^0_{S}K^0_{L}$ in the center-of-mass energy range 1004--1060 MeV with the CMD-3 detector at the VEPP-2000 $e^+ e^-$ collider

The $e^+ e^- \to K^0_{S}K^0_{L}$ cross section has been measured in the center-of-mass energy range 1004--1060 MeV at 25 energy points using $6.1 \times 10^5$ events with $K^0_{S}\to \pi^+\pi^-$ decay. The analysis is based on 5.9 pb$^{-1}$…

High Energy Physics - Experiment · Physics 2018-08-25 E. A. Kozyrev

Noncommutative QED corrections to e^+e^-\to\gamma\gamma\gamma at linear collider energies

We compute the total cross section as well as angular and energy distributions for process $e^+e^-\to\gamma\gamma\gamma$ with both unpolarized and polarized beams in the framework of noncommutative quantum electrodynamics (NCQED). The…

High Energy Physics - Phenomenology · Physics 2008-11-26 Alberto Devoto , Stefano Di Chiara , Wayne W. Repko

Measurement of $R_{\text{uds}}$ and $R$ between 3.12 and 3.72 GeV at the KEDR detector

Using the KEDR detector at the VEPP-4M $e^+e^-$ collider, we have measured the values of $R_{\text{uds}}$ and $R$ at seven points of the center-of-mass energy between 3.12 and 3.72 GeV. The total achieved accuracy is about or better than…

High Energy Physics - Experiment · Physics 2016-01-12 V. V. Anashin , V. M. Aulchenko , E. M. Baldin , A. K. Barladyan , A. Yu. Barnyakov , M. Yu. Barnyakov , S. E. Baru , I. Yu. Basok , A. M. Batrakov , A. E. Blinov , V. E. Blinov , A. V. Bobrov , V. S. Bobrovnikov , A. V. Bogomyagkov , A. E. Bondar , A. R. Buzykaev , S. I. Eidelman , D. N. Grigoriev , Yu. M. Glukhovchenko , S. E. Karnaev , G. V. Karpov , S. V. Karpov , P. V. Kasyanenko , T. A. Kharlamova , V. A. Kiselev , V. V. Kolmogorov , S. A. Kononov , K. Yu. Kotov , E. A. Kravchenko , V. N. Kudryavtsev , V. F. Kulikov , G. Ya. Kurkin , I. A. Kuyanov , E. B. Levichev , D. A. Maksimov , V. M. Malyshev , A. L. Maslennikov , O. I. Meshkov , S. I. Mishnev , I. I. Morozov , N. Yu. Muchnoi , V. V. Neufeld , S. A. Nikitin , I. B. Nikolaev , I. N. Okunev , A. P. Onuchin , S. B. Oreshkin , A. A. Osipov , I. V. Ovtin , S. V. Peleganchuk , S. G. Pivovarov , P. A. Piminov , V. V. Petrov , V. G. Prisekin , O. L. Rezanova , A. A. Ruban , V. K. Sandyrev , G. A. Savinov , A. G. Shamov , D. N. Shatilov , B. A. Shwartz , E. A. Simonov , S. V. Sinyatkin , A. N. Skrinsky , A. V. Sokolov , A. M. Sukharev , E. V. Starostina , A. A. Talyshev , V. A. Tayursky , V. I. Telnov , Yu. A. Tikhonov , K. Yu. Todyshev , G. M. Tumaikin , Yu. V. Usov , A. I. Vorobiov , V. N. Zhilich , V. V. Zhulanov , A. N. Zhuravlev

Measurement of the $\mathbf{e^+e^- \rightarrow K_S K_L \pi^0}$ cross section in the energy range $\mathbf{\sqrt{s}=1.3-2.0}$ GeV

The $e^+e^- \rightarrow K_S K_L \pi^0$ cross section is measured in the center-of-mass energy range $\sqrt{s}=1.3-2.0$ GeV. The analysis is based on the data sample with an integrated luminosity of 33.5 pb$^{-1}$ collected with the SND…

High Energy Physics - Experiment · Physics 2018-02-28 M. N. Achasov , V. M. Aulchenko , A. Yu. Barnyakov , K. I. Beloborodov , A. V. Berdyugin , D. E. Berkaev , A. G. Bogdanchikov , A. A. Botov , T. V. Dimova , V. P. Druzhinin , V. B. Golubev , L. V. Kardapoltsev , A. S. Kasaev , A. G. Kharlamov , A. N. Kirpotin , I. A. Koop , L. A. Korneev , A. A. Korol , D. P. Kovrizhin , S. V. Koshuba , A. S. Kupich , N. A. Melnikova , K. A. Martin , A. E. Obrazovsky , A. V. Otboev , E. V. Pakhtusova , K. V. Pugachev , Yu. A. Rogovsky , A. I. Senchenko , S. I. Serednyakov , Z. K. Silagadze , Yu. M. Shatunov , D. A. Shtol , D. B. Shwartz , I. K. Surin , Yu. V. Usov , A. V. Vasiljev

A Phenomenological Study of the Process $e^+e^-\to\mu^+\mu^-\nu_l\bar\nu_l$ at High Energy $e^+e^-$ Colliders and Measurement of the $ZWW$ and $\gamma WW$ Couplings

We perform a detailed study of the process $e^+e^-\to \mu^+\mu^-\nu_l\bar\nu_l$ including all contributions. The contributions other than from real gauge boson production leads to a rich phenomenology. We explore the use of the process as a…

High Energy Physics - Phenomenology · Physics 2009-10-28 G. Couture , S. Godfrey

Recent results from the KEDR Detector

We report results of experiments performed with the KEDR detector at the VEPP-4M e+e- collider. They include precise measurement of the D0 and D+- meson masses, determination of the psi(3770) resonance parameters, and a search for narrow…

High Energy Physics - Experiment · Physics 2015-05-18 V. V. Anashin , V. M. Aulchenko , E. M. Baldin , A. K. Barladyan , A. Yu. Barnyakov , M. Yu. Barnyakov , S. E. Baru , I. V. Bedny , O. L. Beloborodova , A. E. Blinov , V. E. Blinov , A. V. Bobrov , V. S. Bobrovnikov , A. V. Bogomyagkov , A. E. Bondar , A. R. Buzykaev , S. I. Eidelman , Yu. M. Glukhovchenko , V. V. Gulevich , D. V. Gusev , S. E. Karnaev , S. V. Karpov , T. A. Kharlamova , V. A. Kiselev , S. A. Kononov , K. Yu. Kotov , E. A. Kravchenko , V. F. Kulikov , G. Ya. Kurkin , E. A. Kuper , E. B. Levichev , D. A. Maksimov , V. M. Malyshev , A. L. Maslennikov , A. S. Medvedko , O. I. Meshkov , S. I. Mishnev , I. I. Morozov , N. Yu. Muchnoi , V. V. Neufeld , S. A. Nikitin , I. B. Nikolaev , I. N. Okunev , A. P. Onuchin , S. B. Oreshkin , I. O. Orlov , A. A. Osipov , S. V. Peleganchuk , S. G. Pivovarov , P. A. Piminov , V. V. Petrov , A. O. Poluektov , I. N. Popkov , V. G. Prisekin , A. A. Ruban , V. K. Sandyrev , G. A. Savinov , A. G. Shamov , D. N. Shatilov , B. A. Shwartz , E. A. Simonov , S. V. Sinyatkin , Yu. I. Skovpen , A. N. Skrinsky , V. V. Smaluk , A. V. Sokolov , A. M. Sukharev , E. V. Starostina , A. A. Talyshev , V. A. Tayursky , V. I. Telnov , Yu. A. Tikhonov , K. Yu. Todyshev , G. M. Tumaikin , Yu. V. Usov , A. I. Vorobiov , A. N. Yushkov , V. N. Zhilich , V. V. Zhulanov , A. N. Zhuravlev

Search for direct production of a2(1320) and f2(1270) mesons in e+e- annihilation

A search for direct production of C-even resonances a2(1320) and f2(1270) in e+e- annihilation was performed with SND detector at VEPP-2M e+e- collider. The upper limits of electronic widths of these mesons were obtained at 90% confidence…

High Energy Physics - Experiment · Physics 2008-11-26 M. N. Achasov , S. E. Baru , K. I. Beloborodov , A. V. Berdyugin , A. G. Bogdanchikov , A. V. Bozhenok , D. A. Bukin , S. V. Burdin , T. V. Dimova , A. A. Drozdetsky , V. P. Druzhinin , M. S. Dubrovin , I. A. Gaponenko , V. B. Golubev , V. N. Ivanchenko , A. A. Korol , M. S. Korostelev , S. V. Koshuba , G. A. Kukartsev , E. V. Pakhtusova , A. A. Polunin , E. E. Pyata , A. A. Salnikov , S. I. Serednyakov , V. A. Sidorov , Z. K. Silagadze , A. N. Skrinsky , V. V. Shary , Yu. M. Shatunov , A. V. Vasiljev

Search for the process $\mathbf{e^+e^- \to\eta}$

A search for the rare decay $\eta \rightarrow e^+e^-$ is performed using the inverse process $e^+e^- \rightarrow \eta$ in the decay mode $\eta\to\pi^0\pi^0\pi^0 $. We analyze data with an integrated luminosity of 654 nb$^{-1} $ accumulated…

High Energy Physics - Experiment · Physics 2018-09-26 M. N. Achasov , A. Yu. Barnyakov , K. I. Beloborodov , A. V. Berdyugin , D. E. Berkaev , A. G. Bogdanchikov , A. A. Botov , T. V. Dimova , V. P. Druzhinin , V. B. Golubev , L. V. Kardapoltsev , A. S. Kasaev , A. G. Kharlamov , I. A. Koop , L. A. Korneev , A. A. Korol , D. P. Kovrizhin , S. V. Koshuba , A. S. Kupich , R. A. Litvinov , K. A. Martin , N. A. Melnikova , N. Yu. Muchnoi , A. E. Obrazovsky , E. V. Pakhtusova , K. V. Pugachev , Yu. A. Rogovsky , A. I. Senchenko , S. I. Serednyakov , Z. K. Silagadze , D. N. Shatilov , Yu. M. Shatunov , D. A. Shtol , D. B. Shwartz , I. K. Surin , Yu. V. Usov , A. V. Vasiljev , V. N. Zhabin , V. V. Zhulanov

Signatures of Extra Dimensions at e-gamma and gamma-gamma Colliders

We study the processes \gamma \e -> \gamma \e and \gamma \gamma -> \gamma \gamma, in the context of the proposal for Weak Scale Quantum Gravity (WSQG) with large extra dimensions. With an ultraviolet cutoff $M_S \sim 1$ TeV for the…

High Energy Physics - Phenomenology · Physics 2015-06-25 Hooman Davoudiasl

Measurement of the WW-Gamma Vertex Through Single Photon Production at e^+ e^- Colliders

We perform a detailed study of the process $e^+e^-\to\gamma\nu_l\bar\nu_l$ and its sensitivity to anomalous gauge boson couplings of the $\gamma WW$ vertex. We concentrate on LEP II energies, $\sqrt{s}=200$ GeV, and energies appropria- te…

High Energy Physics - Phenomenology · Physics 2014-11-17 G. Couture , S. Godfrey

Differential cross section and photon-beam asymmetry for the gamma p -> pi- Delta++(1232) reaction at forward pi- angles for Egamma=1.5-2.95 GeV

Differential cross sections and photon-beam asymmetries for the gamma p -> pi- Delta++(1232) reaction have been measured for 0.7<cos(theta)<1 and Egamma=1.5-2.95 GeV at SPring-8/LEPS. The first-ever high statistics cross section data are…

Nuclear Experiment · Physics 2018-05-23 H. Kohri , S. H. Shiu , W. C. Chang , Y. Yanai , D. S. Ahn , J. K. Ahn , J. Y. Chen , S. Date , H. Ejiri , H. Fujimura , M. Fujiwara , S. Fukui , W. Gohn , K. Hicks , A. Hosaka , T. Hotta , S. H. Hwang , K. Imai , T. Ishikawa , K. Joo , Y. Kato , Y. Kon , H. S. Lee , Y. Maeda , T. Mibe , M. Miyabe , Y. Morino , N. Muramatsu , T. Nakano , Y. Nakatsugawa , S. i. Nam , M. Niiyama , H. Noumi , Y. Ohashi , T. Ohta , M. Oka , J. D. Parker , C. Rangacharyulu , R. Y. Ryu , T. Sawada , H. Shimizu , E. A. Strokovsky , Y. Sugaya , M. Sumihama , T. Tsunemi , M. Uchida , M. Ungaro , S. Y. Wang , M. Yosoi

Search for Lepton Flavor Violation Process e^+e^- \to e\mu in the Energy Region \sqrt{s}=984 -- 1060 MeV and \phi\to e\mu Decay

The search for lepton-flavor-violation process e^+e^-\to e\mu in the energy region \sqrt{s}=984 - 1060 MeV with SND detector at VEPP-2M e^+e^- collider is reported. The model independent 90% CL upper limits on the e^+e^-\to e\mu cross…

High Energy Physics - Experiment · Physics 2010-04-29 M. N. Achasov , K. I. Beloborodov , A. V. Bergyugin , A. G. Bogdanchikov , A. D. Bukin , D. A. Bukin , T. V. Dimova , V. P. Druzhinin , V. B. Golubev , I. A. Koop , A. A. Korol , S. V. Koshuba , A. P. Lysenko , E. V. Pakhtusova , S. I. Serednyakov , Yu. M . Shatunov , Z. K. Silagadze , A. N. Skrinsky , A. V. Vasiljev

Excited Neutrino at Next Linear Colliders

The possibility of single and pair excited neutrino production in high energy e+e-, gamma-e and gamma-gamma collisions on linear colliders is studied. The integrated cross sections of these subproceses are calculated. Special attention is…

High Energy Physics - Phenomenology · Physics 2011-04-20 A. S. Belyaev , E. E. Boos

Measurement of the e+e- -> D(*)+D(*)- cross-sections

We report first measurements of e+e- -> D(*)+D(*)- processes far above threshold. The cross-sections for e+e- -> DT*+DL*- and e+e- -> D+D*T- at sqrt{s}=10.58 GeV/c2 are measured to be 0.55 +- 0.03 +- 0.05 pb and 0.62 +- 0.03 +- 0.06 pb,…

High Energy Physics - Experiment · Physics 2019-08-14 T. Uglov