Related papers: Joint description of the e+e- annihilation into bo…

On the reaction g d -> pi0 d near the threshold of eta production

We consider the reaction g+d -> pi+d in a wide energy range around and above the eta-meson photoproduction threshold at backward CM angles of the outgoing pion. Our theoretical analysis is essentially motivated by the recent measurements of…

Nuclear Theory · Physics 2008-11-26 A. E. Kudryavtsev , V. E. Tarasov , I. I. Strakovsky , W. J. Briscoe , Y. Ilieva

Study of e+e- --> omega pi0 --> pi0 pi0 gamma in the energy range 1.05--2.00 GeV with SND

The cross section for the process e+e- --> omega pi0 --> pi0 pi0 gamma has been measured in the energy range 1.05--2.00 GeV. The experiment has been performed at the e+e- collider VEPP-2000 with the SND detector. The measured e+e- --> omega…

High Energy Physics - Experiment · Physics 2013-09-18 M. N. Achasov , V. M. Aulchenko , A. Yu. Barnyakov , K. I. Beloborodov , A. V. Berdyugin , A. G. Bogdanchikov , A. A. Botov , T. V. Dimova , V. P. Druzhinin , V. B. Golubev , K. A. Grevtsov , L. V. Kardapoltsev , A. G. Kharlamov , D. P. Kovrizhin , I. A. Koop , A. A. Korol , S. V. Koshuba , A. P. Lysenko , K. A. Martin , I. N. Nesterenko , A. E. Obrazovsky , E. V. Pakhtusova , E. A. Perevedentsev , A. L. Romanov , S. I. Serednyakov , Z. K. Silagadze , K. Yu. Skovpen , A. N. Skrinsky , I. K. Surin , Yu. A. Tikhonov , A. V. Vasiljev , P. Yu. Shatunov , Yu. M. Shatunov , D. A. Shtol , A. L. Romanov , I. M. Zemlyansky

The e+ e- --> 3(pi+pi-), 2(pi+pi-pi0) and K+K- 2(pi+pi-) Cross Sections at Center-of-Mass Energies from Production Threshold to 4.5 GeV Measured with Initial-State Radiation

We study the processes e+ e- --> 3(pi+pi-)gamma, 2(pi+pi-pi0)gamma and K+ K- 2(pi+pi-)gamma, with the photon radiated from the initial state. About 20,000, 33,000 and 4,000 fully reconstructed events, respectively, have been selected from…

High Energy Physics - Experiment · Physics 2010-03-19 The BABAR Collaboration , B. Aubert

Another look at the angular distributions of the $\gamma\gamma\to\pi \pi$ reactions

We analyze the existing data on the angular distributions of the $\gamma\gamma\to \pi^+ \pi^- ,\pi^0 \pi^0$ reactions with using of the unitary model for helicity 2 amplitude. The purpose is to obtain the D--wave parameters and S--wave…

High Energy Physics - Phenomenology · Physics 2008-02-03 A. E. Kaloshin , V. M. Persikov , V. V. Serebryakov

Study of isospin violating $\phi$ excitation in $e^+e^- \to \omega\pi^0$

We study the reaction $e^+ e^-\to \omega\pi^0$ in the vicinity of $\phi$ mass region. The isospin-violating $\phi$ excitation is accounted for by two major mechanisms. One is electromagnetic (EM) transition and the other is strong isospin…

High Energy Physics - Phenomenology · Physics 2015-05-13 Gang Li , Yuan-Jiang Zhang , Qiang Zhao

$\chi_{c0} \, \omega$ production in $e^+e^-$ annihilation through $\psi(4160)$

We argue that the recent BESIII data on the cross section for the process $e^+e^- \to \chi_{c0} \, \omega$ in the center of mass energy range 4.21 - 4.42 GeV can be described by the contribution of the known charmonium-like resonance…

High Energy Physics - Phenomenology · Physics 2015-03-05 Xin Li , M. B. Voloshin

Production of $\pi^0\rho^0$ pair in electron-positron annihilation in the Nambu-Jona-Lasinio model

The process $e^+e^- \to \pi^0\rho$ is described in the framework of the expanded NJL model in the energy region from 0.9 GeV to 1.5 GeV. The contribution of intermediate state with vector mesons $\omega(782), \,\,\phi(1020)$, and…

High Energy Physics - Phenomenology · Physics 2015-06-03 A. I. Ahmadov , E. A. Kuraev , M. K. Volkov

Four-pion production in tau decays and e+e- annihilation: an update

An improved description of four-pion production in electron-positron annihilation and in tau lepton decays is presented. The model amplitude is fitted to recent data from BaBar which cover a wide energy range and which were obtained…

High Energy Physics - Phenomenology · Physics 2008-11-26 Henryk Czyz , Johann H. Kuhn , Agnieszka Wapienik

Measurement of the $e^+e^-\to\pi^+\pi^-\pi^0$ cross section from 0.7 GeV to 3.0 GeV via initial-state radiation

The cross section of the process $e^+e^-\to\pi^+\pi^-\pi^0$ is measured with a precision of 1.6% to 25% in the energy range between $0.7$ and 3.0 GeV using the Initial State Radiation method. A data set with an integrated luminosity of…

High Energy Physics - Experiment · Physics 2019-12-25 M. Ablikim , M. N. Achasov , P. Adlarson , S. Ahmed , M. Albrecht , M. Alekseev , A. Amoroso , F. F. An , Q. An , Y. Bai , O. Bakina , R. Baldini Ferroli , I. Balossino , Y. Ban , K. Begzsuren , J. V. Bennett , N. Berger , M. Bertani , D. Bettoni , F. Bianchi , J Biernat , J. Bloms , I. Boyko , R. A. Briere , H. Cai , X. Cai , A. Calcaterra , G. F. Cao , N. Cao , S. A. Cetin , J. Chai , J. F. Chang , W. L. Chang , G. Chelkov , D. Y. Chen , G. Chen , H. S. Chen , J. Chen , M. L. Chen , S. J. Chen , X. R. Chen , Y. B. Chen , W. Cheng , G. Cibinetto , F. Cossio , X. F. Cui , H. L. Dai , J. P. Dai , X. C. Dai , A. Dbeyssi , D. Dedovich , Z. Y. Deng , A. Denig , I. Denysenko , M. Destefanis , F. De Mori , Y. Ding , C. Dong , J. Dong , L. Y. Dong , M. Y. Dong , Z. L. Dou , S. X. Du , J. Z. Fan , J. Fang , S. S. Fang , Y. Fang , R. Farinelli , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , M. Fritsch , C. D. Fu , Y. Fu , Q. Gao , X. L. Gao , Y. Gao , Y. Gao , Y. G. Gao , B. Garillon , I. Garzia , E. M. Gersabeck , A. Gilman , K. Goetzen , L. Gong , W. X. Gong , W. Gradl , M. Greco , L. M. Gu , M. H. Gu , S. Gu , Y. T. Gu , A. Q. Guo , L. B. Guo , R. P. Guo , Y. P. Guo , A. Guskov , S. Han , X. Q. Hao , F. A. Harris , K. L. He , F. H. Heinsius , T. Held , Y. K. Heng , M. Himmelreich , Y. R. Hou , Z. L. Hou , H. M. Hu , J. F. Hu , T. Hu , Y. Hu , G. S. Huang , J. S. Huang , X. T. Huang , X. Z. Huang , N. Huesken , T. Hussain , W. Ikegami Andersson , W. Imoehl , M. Irshad , Q. Ji , Q. P. Ji , X. B. Ji , X. L. Ji , H. L. Jiang , X. S. Jiang , X. Y. Jiang , J. B. Jiao , Z. Jiao , D. P. Jin , S. Jin , Y. Jin , T. Johansson , N. Kalantar-Nayestanaki , X. S. Kang , R. Kappert , M. Kavatsyuk , B. C. Ke , I. K. Keshk , A. Khoukaz , P. Kiese , R. Kiuchi , R. Kliemt , L. Koch , O. B. Kolcu , B. Kopf , M. Kuemmel , M. Kuessner , A. Kupsc , M. Kurth , M. G. Kurth , W. K\ühn , J. S. Lange , P. Larin , L. Lavezzi , H. Leithoff , T. Lenz , C. Li , C. H. Li , Cheng Li , D. M. Li , F. Li , G. Li , H. B. Li , H. J. Li , J. C. Li , Ke Li , L. K. Li , Lei Li , P. L. Li , P. R. Li , W. D. Li , W. G. Li , X. H. Li , X. L. Li , X. N. Li , Z. B. Li , Z. Y. Li , H. Liang , H. Liang , Y. F. Liang , Y. T. Liang , G. R. Liao , L. Z. Liao , J. Libby , C. X. Lin , D. X. Lin , Y. J. Lin , B. Liu , B. J. Liu , C. X. Liu , D. Liu , D. Y. Liu , F. H. Liu , Fang Liu , Feng 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. Y. Liu , Q. Liu , S. B. Liu , T. Liu , X. Liu , X. Y. Liu , Y. B. Liu , Z. A. Liu , Zhiqing Liu , Y. F. Long , X. C. Lou , H. J. Lu , J. D. Lu , J. G. Lu , Y. Lu , Y. P. Lu , C. L. Luo , M. X. Luo , P. W. Luo , T. Luo , X. L. Luo , S. Lusso , X. R. Lyu , F. C. Ma , H. L. Ma , L. L. Ma , M. M. Ma , Q. M. Ma , X. N. Ma , X. X. Ma , X. Y. Ma , Y. M. Ma , F. E. Maas , M. Maggiora , S. Maldaner , S. Malde , Q. A. Malik , A. Mangoni , Y. J. Mao , Z. P. Mao , S. Marcello , Z. X. Meng , J. G. Messchendorp , G. Mezzadri , J. Min , T. J. Min , R. E. Mitchell , X. H. Mo , Y. J. Mo , C. Morales Morales , N. Yu. Muchnoi , H. Muramatsu , A. Mustafa , S. Nakhoul , Y. Nefedov , F. Nerling , I. B. Nikolaev , Z. Ning , S. Nisar , S. L. Niu , S. L. Olsen , Q. Ouyang , S. Pacetti , Y. Pan , M. Papenbrock , P. Patteri , M. Pelizaeus , H. P. Peng , K. Peters , J. Pettersson , J. L. Ping , R. G. Ping , A. Pitka , R. Poling , V. Prasad , M. Qi , S. Qian , C. F. Qiao , X. P. Qin , X. S. Qin , Z. H. Qin , J. F. Qiu , S. Q. Qu , K. H. Rashid , K. Ravindran , C. F. Redmer , M. Richter , A. Rivetti , V. Rodin , M. Rolo , G. Rong , Ch. Rosner , M. Rump , A. Sarantsev , M. Savri\\é , Y. Schelhaas , K. Schoenning , W. Shan , X. Y. Shan , M. Shao , C. P. Shen , P. X. Shen , X. Y. Shen , H. Y. Sheng , X. Shi , X. D Shi , J. J. Song , Q. Q. Song , X. Y. Song , S. Sosio , C. Sowa , S. Spataro , F. F. Sui , G. X. Sun , J. F. Sun , L. Sun , S. S. Sun , X. H. Sun , Y. J. Sun , Y. K Sun , Y. Z. Sun , Z. J. Sun , Z. T. Sun , Y. T Tan , C. J. Tang , G. Y. Tang , X. Tang , V. Thoren , B. Tsednee , I. Uman , B. Wang , B. L. Wang , C. W. Wang , D. Y. Wang , K. Wang , L. L. Wang , L. S. Wang , M. Wang , M. Z. Wang , Meng Wang , P. L. Wang , R. M. Wang , W. P. Wang , X. Wang , X. F. Wang , X. L. Wang , Y. Wang , Y. Wang , Y. F. Wang , Y. Q. Wang , Yaqian Wang , Z. Wang , Z. G. Wang , Z. Y. Wang , Z. Y. Wang , Zongyuan Wang , T. Weber , D. H. Wei , P. Weidenkaff , F. Weidner , H. W. Wen , S. P. Wen , U. Wiedner , G. Wilkinson , M. Wolke , L. H. Wu , L. J. Wu , Z. Wu , L. Xia , Y. Xia , S. Y. Xiao , Y. J. Xiao , Z. J. Xiao , Y. G. Xie , Y. H. Xie , T. Y. Xing , X. A. Xiong , Q. L. Xiu , G. F. Xu , J. J. Xu , L. Xu , Q. J. Xu , W. Xu , X. P. Xu , F. Yan , L. Yan , W. B. Yan , W. C. Yan , Y. H. Yan , H. J. Yang , H. X. Yang , L. Yang , R. X. Yang , S. L. Yang , Y. H. Yang , Y. X. Yang , Yifan Yang , Z. Q. Yang , Zhi Yang , M. Ye , M. H. Ye , J. H. Yin , Z. Y. You , B. X. Yu , C. X. Yu , J. S. Yu , T. Yu , C. Z. Yuan , X. Q. Yuan , Y. Yuan , C. X. Yue , A. Yuncu , A. A. Zafar , Y. Zeng , B. X. Zhang , B. Y. Zhang , C. C. Zhang , D. H. Zhang , H. H. Zhang , H. Y. Zhang , J. Zhang , J. L. Zhang , J. Q. Zhang , J. W. Zhang , J. Y. Zhang , J. Z. Zhang , K. Zhang , L. Zhang , Lei Zhang , S. F. Zhang , T. J. Zhang , X. Y. Zhang , Y. Zhang , Y. H. Zhang , Y. T. Zhang , Yang Zhang , Yao Zhang , Yi Zhang , Yu Zhang , Z. H. Zhang , Z. P. Zhang , Z. Y. Zhang , G. Zhao , J. Zhao , J. W. Zhao , J. Y. Zhao , J. Z. Zhao , Lei Zhao , Ling Zhao , M. G. Zhao , Q. Zhao , S. J. Zhao , T. C. Zhao , Y. B. Zhao , Z. G. Zhao , A. Zhemchugov , B. Zheng , J. P. Zheng , Y. Zheng , Y. H. Zheng , B. Zhong , L. Zhou , L. P. Zhou , Q. Zhou , X. Zhou , X. K. Zhou , X. R. Zhou , Xiaoyu Zhou , Xu Zhou , A. N. Zhu , J. Zhu , J. Zhu , K. Zhu , K. J. Zhu , S. H. Zhu , W. J. Zhu , X. L. Zhu , Y. C. Zhu , Y. S. Zhu , Z. A. Zhu , J. Zhuang , B. S. Zou , J. H. Zou

a_1\pi Contribution to e^+e^-\to 4\pi Annihilation and \tau\to 4\pi\nu_{\tau} Decay

The results of the study of the process e^+e^- \to 4\pi by the CMD-2 collaboration at VEPP-2M are presented. Analysis of the differential distributions demonstrates the dominance of the a_1\pi and \omega\pi intermediate states. Simple…

High Energy Physics - Experiment · Physics 2007-05-23 A. I. Milstein

Radiative return meets GVMD

We improve the description of pion-photon interactions in the radiative return process $e^+e^-\to \pi^+\pi^-\gamma$ at the next-to-leading order by including the pion form factor in the Feynman rules. We present a general calculation of the…

High Energy Physics - Phenomenology · Physics 2026-03-16 Pau Petit Rosàs , Olga Shekhovtsova , William J. Torres Bobadilla

Study of dynamics of the process $e^+e^-\to \pi^+\pi^-\pi^0$ in the energy range 1.15--2.00 GeV

The dynamics of the process $ e^+e^- \to \pi^+\pi^-\pi^0 $ is studied in the energy region from 1.15 to 2.00 GeV using data accumulated with the SND detector at the VEPP-2000 $e^+e^-$ collider. The Dalitz plot distribution and $\pi^+\pi^-$…

High Energy Physics - Experiment · Physics 2020-11-02 SND Collaboration , M. N. Achasov , A. Yu. Barnyakov , A. A. Baykov , K. I. Beloborodov , A. V. Berdyugin , D. E. Berkaev , A. G. Bogdanchikov , A. A. Botov , T. V. Dimova , V. P. Druzhinin , V. B. Golubev , A. N. Kirpotin , L. V. Kardapoltsev , A. S. Kasaev , A. G. Kharlamov , I. A. Koop , A. A. Korol , D. P. Kovrizhin , A. S. Kupich , K. A. Martin , N. A. Melnikova , N. Yu. Muchnoi , A. E. Obrazovsky , E. V. Pakhtusova , K. V. Pugachev , D. V. Rabusov , Yu. A. Rogovsky , Y. S. Savchenko , A. I. Senchenko , S. I. Serednyakov , D. N. Shatilov , Yu. M. Shatunov , D. A. Shtol , D. B. Shwartz , Z. K. Silagadze , I. K. Surin , M. V. Timoshenko , Yu. V. Usov , V. N. Zhabin , V. V. Zhulanov

Statistical model analysis of multiparticle correlations in e^+e^- annihilation

A new statistical model for multiparticle production in $e^+e^-$ annihilation is proposed based on the idea of the longitudinal phase space with limited transverse momentum. The longitudinal rapidity space is divided into cells of equal…

High Energy Physics - Phenomenology · Physics 2009-10-31 T. Osada , M. Maruyama , F. Takagi

Study of the process $e^+e^- \to \eta\pi^0\gamma$ in the energy range $\sqrt{s} = \mbox{1.05-2.00}$ GeV with the SND detector

The process $e^+e^-\to\eta\pi^0\gamma$ is studied in the center-of-mass energy range 1.05-2.00 GeV using data with an integrated luminosity of 94.5 pb$^{-1}$ collected by the SND detector at the VEPP-2000 $e^+e^-$ collider. The…

High Energy Physics - Experiment · Physics 2020-11-06 SND Collaboration , M. N. Achasov , A. Yu. Barnyakov , A. A. Baykov , K. I. Beloborodov , A. V. Berdyugin , D. E. Berkaev , A. G. Bogdanchikov , A. A. Botov , T. V. Dimova , V. P. Druzhinin , V. B. Golubev , A. N. Kirpotin , L. V. Kardapoltsev , A. S. Kasaev , A. G. Kharlamov , I. A. Koop , A. A. Korol , D. P. Kovrizhin , A. S. Kupich , K. A. Martin , N. A. Melnikova , N. Yu. Muchnoy , A. E. Obrazovsky , E. V. Pakhtusova , K. V. Pugachev , D. V. Rabusov , Yu. A. Rogovsky , Y. S. Savchenko , A. I. Senchenko , S. I. Serednyakov , D. N. Shatilov , Yu. M. Shatunov , D. A. Shtol , D. B. Shwartz , Z. K. Silagadze , I. K. Surin , M. V. Timoshenko , Yu. V. Usov , V. N. Zhabin , V. V. Zhulanov

a0+(980)-resonance production in the reaction pp -> dpi+eta close to the K(bar(K)) threshold

The reaction pp -> dpi+eta has been measured at a beam energy of T=2.65 GeV (p=3.46 GeV/c) using the ANKE spectrometer at COSY-Juelich. The missing mass distribution of the detected dpi+ pairs exhibits a peak around the eta mass on top of a…

Nuclear Experiment · Physics 2008-11-26 P. Fedorets , M. Buescher , V. P. Chernyshev , S. Dymov , V. Yu. Grishina , C. Hanhart , M. Hartmann , V. Hejny , V. Kleber , H. R. Koch , L. A. Kondratyuk , V. Koptev , A. E. Kudryavtsev , P. Kulessa , S. Merzliakov , S. Mikirtychiants , M. Nekipelov , H. Ohm , R. Schleichert , H. Stroeher , V. E. Tarasov , K. -H. Watzlawik , I. Zychor

Energy and angular distributions of the bottom quark in the electron-positron annihilation $e^+e^-\to b \, W^+ \, \bar{t}$

The distributions of the bottom quark in the process $e^+ e^- \to t \, \bar{t} \to b \, W^+ \, \bar{t}$ are considered at the $e^+ e^-$ energy corresponding to the first construction stage of the Compact Linear Collider. The cross sections…

High Energy Physics - Phenomenology · Physics 2021-02-25 I. V. Truten , A. Yu. Korchin

Threshold $\pi^-$ Photoproduction on the Neutron

Recent data from the PIONS$@$MAX-lab Collaboration, measuring the total cross section of the pion incoherent photoproduction $\gamma d\to\pi^-pp$ near threshold, have been used to extract the E$_{0+}$ multipole and total cross section of…

Nuclear Theory · Physics 2020-04-07 W. J. Briscoe , A. E. Kudryavtsev , I. I. Strakovsky , V. E. Tarasov , R. L. Workman

Study of the process e+e- to pi+pi-pi+pi-pi0 with CMD-2 detector

The process e+e- to pi+ pi- pi+ pi- pi0 has been studied in the center of mass energy range 1280 -- 1380 MeV using 3.0 1/pb of data collected with the CMD-2 detector in Novosibirsk. Analysis shows that the cross section of the five pion…

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

Analysis of low energy pion spectra

The transverse mass spectra and the rapidity distributions of $\pi^+$ and $\pi^-$ in Au-Au collisions at 2, 4, 6, and 8 GeV$\cdot$A by E895 collaboration are fitted using an elliptically expanding fireball model with the contribution from…

Nuclear Theory · Physics 2015-05-13 Suk Choi , Kang Seog Lee

The reaction pi N to pi pi N in a meson-exchange approach

A resonance model for two-pion production in the pion-nucleon reaction is developed that includes information obtained in the analysis of pion-nucleon scattering in a meson-exchange model. The baryonic resonances Delta(1232), N*(1440),…

Nuclear Theory · Physics 2007-05-23 S. Schneider , S. Krewald , Ulf-G. Meißner