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Measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo…

X. L. Wang,Yuan Chao,C. P. Shen,P. Wang,A. Abdesselam,I. Adachi,H. Aihara,S. Al Said,K. Arinstein,D. M. Asner,R. Ayad,A. M. Bakich,V. Bansal,B. Bhuyan,A. Bobrov,G. Bonvicini,M. Bračko,T. E. Browder,D. Červenkov,P. Chang,V. Chekelian,A. Chen,B. G. Cheon,K. Chilikin,R. Chistov,K. Cho,Veronika Chobanova,S. K. Choi,Y. Choi,D. Cinabro,J. Dalseno,Mikhail Danilov,Zdeněk Doležal,Z. Drásal,A. Drutskoy,K. Dutta,S. Eidelman,H. Farhat,J. Fast,T. Ferber,V. Gaur,A. Garmash,D. Getzkow,R. Gillard,Y. M. Goh,J. Haba,K. Hayasaka,H. Hayashii,X. He,W.-S. Hou,T. Iijima,K. Inami,A. Ishikawa,R. Itoh,Y. Iwasaki,D. Joffe,T. Julius,K. H. Kang,E. Kato,T. Kawasaki,C. Kiesling,D. Y. Kim,H. J. Kim,J. B. Kim,J. H. Kim,M. J. Kim,S. H. Kim,Y. J. Kim,K. Kinoshita,B. R. Ko,Peter Kodyš,S. Korpar,P. Križan,P. Krokovny,A. Kuzmin,Y. J. Kwon,J. S. Lange,I. S. Lee,P. Lewis,Y. Li,L. Li Gioi,J. Libby,D. Liventsev,P. Lukin,D. Matvienko,K. Miyabayashi,H. Miyata,R. Mizuk,A. Moll,Takashi Mori,R. Mussa,E. Nakano,M. Nakao,Tara Nanut,Z. Natkaniec,N. K. Nisar,S. Nishida,S. Ogawa,S. Okuno,S. L. Olsen,P. Pakhlov,G. Pakhlova,C. W. Park,H. Park,T. K. Pedlar,R. Pestotnik,M. Petrič,L. E. Piilonen,E. Ribežl,M. Ritter,A. Rostomyan,S. Ryu,Y. Sakai,S. Sandilya,L. Šantelj,T. Sanuki,V. Savinov,O. Schneider,G. Schnell,C. Schwanda,D. Semmler,K. Senyo,V. Shebalin,T. A. Shibata,J. G. Shiu,A. Sibidanov,F. Simon,Y. S. Sohn,A. Sokolov,E. Solovieva,M. Starič,M. Steder,T. Sumiyoshi,U. Tamponi,K. Tanida,G. Tatishvili,Y. Teramoto,K. Trabelsi,M. Uchida,T. Uglov,Y. Unno,S. Uno,Y. Usov,C. Van Hulse,P. Vanhoefer,G. Varner,A. Vinokurova,M. N. Wagner,Y. Watanabe,E. Won,S. Yashchenko,Y. Yusa,Z. P. Zhang,V. Zhilich,A. Zupanc

Physics

Electron–positron annihilation

2015

We report measurement of the cross section of $e^+e^-\to \pi^+\pi^-\psi(2S)$ between 4.0 and $5.5 {\rm GeV}$, based on an analysis of initial state radiation events in a $980 \rm fb^{-1}$ data sample recorded with the Belle detector. The properties of the $Y(4360)$ and $Y(4660)$ states are determined. Fitting the mass spectrum of $\pi^+\pi^-\psi(2S)$ with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: $M_{Y(4360)} = (4347\pm 6\pm 3) {\rm MeV}/c^2$, $\Gamma_{Y(4360)} = (103\pm 9\pm 5) {\rm MeV}$, $M_{Y(4660)} = (4652\pm10\pm 8) {\rm MeV}/c^2$, $\Gamma_{Y(4660)} = (68\pm 11\pm 1) \rm MeV$; and ${\cal{B}}[Y(4360)\to \pi^+\pi^-\psi(2S)]\cdot \Gamma_{Y(4360)}^{e^+e^-} = (10.9\pm 0.6\pm 0.7) \rm eV$ and ${\cal{B}}[Y(4660)\to \pi^+\pi^-\psi(2S)]\cdot \Gamma_{Y(4660)}^{e^+e^-} = (8.1\pm 1.1\pm 0.5) \rm eV$ for one solution; or ${\cal{B}}[Y(4360)\to \pi^+\pi^-\psi(2S)]\cdot \Gamma_{Y(4360)}^{e^+e^-} = (9.2\pm 0.6\pm 0.6) \rm eV$ and ${\cal{B}}[Y(4660)\to \pi^+\pi^-\psi(2S)]\cdot \Gamma_{Y(4660)}^{e^+e^-} = (2.0\pm 0.3\pm 0.2) \rm eV$ for the other. Here, the first errors are statistical and the second systematic. Evidence for a charged charmoniumlike structure at $4.05 {\rm GeV}/c^2$ is observed in the $\pi^{\pm}\psi(2S)$ intermediate state in the $Y(4360)$ decays.

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“Measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo…” is a paper by X. L. Wang Yuan Chao C. P. Shen P. Wang A. Abdesselam I. Adachi H. Aihara S. Al Said K. Arinstein D. M. Asner R. Ayad A. M. Bakich V. Bansal B. Bhuyan A. Bobrov G. Bonvicini M. Bračko T. E. Browder D. Červenkov P. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin R. Chistov K. Cho Veronika Chobanova S. K. Choi Y. Choi D. Cinabro J. Dalseno Mikhail Danilov Zdeněk Doležal Z. Drásal A. Drutskoy K. Dutta S. Eidelman H. Farhat J. Fast T. Ferber V. Gaur A. Garmash D. Getzkow R. Gillard Y. M. Goh J. Haba K. Hayasaka H. Hayashii X. He W.-S. Hou T. Iijima K. Inami A. Ishikawa R. Itoh Y. Iwasaki D. Joffe T. Julius K. H. Kang E. Kato T. Kawasaki C. Kiesling D. Y. Kim H. J. Kim J. B. Kim J. H. Kim M. J. Kim S. H. Kim Y. J. Kim K. Kinoshita B. R. Ko Peter Kodyš S. Korpar P. Križan P. Krokovny A. Kuzmin Y. J. Kwon J. S. Lange I. S. Lee P. Lewis Y. Li L. Li Gioi J. Libby D. Liventsev P. Lukin D. Matvienko K. Miyabayashi H. Miyata R. Mizuk A. Moll Takashi Mori R. Mussa E. Nakano M. Nakao Tara Nanut Z. Natkaniec N. K. Nisar S. Nishida S. Ogawa S. Okuno S. L. Olsen P. Pakhlov G. Pakhlova C. W. Park H. Park T. K. Pedlar R. Pestotnik M. Petrič L. E. Piilonen E. Ribežl M. Ritter A. Rostomyan S. Ryu Y. Sakai S. Sandilya L. Šantelj T. Sanuki V. Savinov O. Schneider G. Schnell C. Schwanda D. Semmler K. Senyo V. Shebalin T. A. Shibata J. G. Shiu A. Sibidanov F. Simon Y. S. Sohn A. Sokolov E. Solovieva M. Starič M. Steder T. Sumiyoshi U. Tamponi K. Tanida G. Tatishvili Y. Teramoto K. Trabelsi M. Uchida T. Uglov Y. Unno S. Uno Y. Usov C. Van Hulse P. Vanhoefer G. Varner A. Vinokurova M. N. Wagner Y. Watanabe E. Won S. Yashchenko Y. Yusa Z. P. Zhang V. Zhilich A. Zupanc published in 2015. It has an Open Access status of “green”. You can read and download a PDF Full Text of this paper here.