First study of η c(1S), η(1760) and X(1835) production via η ′π +π - final states in two-photon collisions

C. C. Zhang; H. Aihara; D. M. Asner; T. Aushev; A. M. Bakich; Y. Ban; K. Belous; M. Bischofberger; T. E. Browder; A. Chen; B. G. Cheon; K. Chilikin; R. Chistov; Y. Choi; J. Dalseno; M. Danilov; S. Eidelman; M. Feindt; V. Gaur; N. Gabyshev; Y. M. Goh; Y. L. Han; H. Hayashii; Y. Horii; W. S. Hou; H. J. Hyun; T. Iijima; K. Inami; A. Ishikawa; M. Iwabuchi; T. Julius; C. Kiesling; H. O. Kim; M. J. Kim; Y. J. Kim; B. R. Ko; P. Kodyš; S. Korpar; P. Krokovny; A. Kuzmin; J. Li; J. Libby; Y. Liu; Z. Q. Liu; R. Louvot; D. Matvienko; S. McOnie; R. Mizuk; E. Nakano; M. Nakao; H. Nakazawa; Z. Natkaniec; S. Nishida; T. Ohshima; S. Okuno; S. L. Olsen; P. Pakhlov; G. Pakhlova; H. Park; H. K. Park; R. Pestotnik; M. Petrič; L. E. Piilonen; M. Röhrken; S. Ryu; H. Sahoo; Y. Sakai; D. Santel; T. Sanuki; O. Schneider; C. Schwanda; M. E. Sevior; M. Shapkin; V. Shebalin; C. P. Shen; T. A. Shibata; J. G. Shiu; B. Shwartz; P. Smerkol; Y. S. Sohn; E. Solovieva; S. Stanič; M. Starič; M. Sumihama; T. Sumiyoshi; I. Tikhomirov; M. Uchida; S. Uehara; T. Uglov; Y. Unno; S. Uno; G. Varner; A. Vinokurova; V. Vorobyev; P. Wang; X. L. Wang; Y. Watanabe; K. M. Williams; B. D. Yabsley; Y. Yamashita; C. Z. Yuan; Z. P. Zhang; V. Zhulanov

doi:10.1103/PhysRevD.86.052002

First study of η _c(1S), η(1760) and X(1835) production via η ^′π ⁺π ^- final states in two-photon collisions

C. C. Zhang, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, Y. Ban, K. Belous, M. Bischofberger, T. E. Browder, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, Y. Choi, J. Dalseno, M. Danilov, S. Eidelman, M. Feindt, V. Gaur, N. GabyshevY. M. Goh, Y. L. Han, H. Hayashii, Y. Horii, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, M. Iwabuchi, T. Julius, C. Kiesling, H. O. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, P. Kodyš, S. Korpar, P. Krokovny, A. Kuzmin, J. Li, J. Libby, Y. Liu, Z. Q. Liu, R. Louvot, D. Matvienko, S. McOnie, R. Mizuk, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, D. Santel, T. Sanuki, O. Schneider, C. Schwanda, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. A. Shibata, J. G. Shiu, B. Shwartz, P. Smerkol, Y. S. Sohn, E. Solovieva, S. Stanič, M. Starič, M. Sumihama, T. Sumiyoshi, I. Tikhomirov, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, A. Vinokurova, V. Vorobyev, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhulanov

SCI - Physics

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

The invariant mass spectrum of the η ^′π ⁺π ^- final state produced in two-photon collisions is obtained using a 673fb ^-1 data sample collected in the vicinity of the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e ⁺e ^- collider. We observe a clear signal of the η _c(1S) and measure its mass and width to be M(η _c(1S))=(2982.7±1.8(stat)±2.2(syst)±0.3(model)) MeV/c2 and Γ(η _c(1S))=(37.8-5.3+5.8(stat)±2.8(syst) ±1.4(model))MeV/c2. The third error is an uncertainty due to possible interference between the η _c(1S) and a nonresonant component. We also report the first evidence for η(1760) decay to η ^′π ⁺π ^-; we find two solutions for its parameters, depending on the inclusion or not of the X(1835), whose existence is of marginal significance in our data. From a fit to the mass spectrum using coherent X(1835) and η(1760) resonant amplitudes, we set a 90% confidence level upper limit on the product Γ _γγB(η ^′π ⁺π ^-) for the X(1835).

Original language	English
Article number	052002
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	86
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.86.052002
Publication status	Published - 2012 Sept 10

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.86.052002

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Zhang, C. C., Aihara, H., Asner, D. M., Aushev, T., Bakich, A. M., Ban, Y., Belous, K., Bischofberger, M., Browder, T. E., Chen, A., Cheon, B. G., Chilikin, K., Chistov, R., Choi, Y., Dalseno, J., Danilov, M., Eidelman, S., Feindt, M., Gaur, V., ... Zhulanov, V. (2012). First study of η _c(1S), η(1760) and X(1835) production via η ^′π ⁺π ^- final states in two-photon collisions. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(5), [052002]. https://doi.org/10.1103/PhysRevD.86.052002

Zhang, CC, Aihara, H, Asner, DM, Aushev, T, Bakich, AM, Ban, Y, Belous, K, Bischofberger, M, Browder, TE, Chen, A, Cheon, BG, Chilikin, K, Chistov, R, Choi, Y, Dalseno, J, Danilov, M, Eidelman, S, Feindt, M, Gaur, V, Gabyshev, N, Goh, YM, Han, YL, Hayashii, H, Horii, Y, Hou, WS, Hyun, HJ, Iijima, T, Inami, K, Ishikawa, A, Iwabuchi, M, Julius, T, Kiesling, C, Kim, HO, Kim, MJ, Kim, YJ, Ko, BR, Kodyš, P, Korpar, S, Krokovny, P, Kuzmin, A, Li, J, Libby, J, Liu, Y, Liu, ZQ, Louvot, R, Matvienko, D, McOnie, S, Mizuk, R, Nakano, E, Nakao, M, Nakazawa, H, Natkaniec, Z, Nishida, S, Ohshima, T, Okuno, S, Olsen, SL, Pakhlov, P, Pakhlova, G, Park, H, Park, HK, Pestotnik, R, Petrič, M, Piilonen, LE, Röhrken, M, Ryu, S, Sahoo, H, Sakai, Y, Santel, D, Sanuki, T, Schneider, O, Schwanda, C, Sevior, ME, Shapkin, M, Shebalin, V, Shen, CP, Shibata, TA, Shiu, JG, Shwartz, B, Smerkol, P, Sohn, YS, Solovieva, E, Stanič, S, Starič, M, Sumihama, M, Sumiyoshi, T, Tikhomirov, I, Uchida, M, Uehara, S, Uglov, T, Unno, Y, Uno, S, Varner, G, Vinokurova, A, Vorobyev, V, Wang, P, Wang, XL, Watanabe, Y, Williams, KM, Yabsley, BD, Yamashita, Y, Yuan, CZ, Zhang, ZP & Zhulanov, V 2012, 'First study of η _c(1S), η(1760) and X(1835) production via η ^′π ⁺π ^- final states in two-photon collisions', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 86, no. 5, 052002. https://doi.org/10.1103/PhysRevD.86.052002

@article{2efb5854a2e54fe99235e75cb44ad143,

title = "First study of η c(1S), η(1760) and X(1835) production via η ′π +π - final states in two-photon collisions",

abstract = "The invariant mass spectrum of the η ′π +π - final state produced in two-photon collisions is obtained using a 673fb -1 data sample collected in the vicinity of the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e +e - collider. We observe a clear signal of the η c(1S) and measure its mass and width to be M(η c(1S))=(2982.7±1.8(stat)±2.2(syst)±0.3(model)) MeV/c2 and Γ(η c(1S))=(37.8-5.3+5.8(stat)±2.8(syst) ±1.4(model))MeV/c2. The third error is an uncertainty due to possible interference between the η c(1S) and a nonresonant component. We also report the first evidence for η(1760) decay to η ′π +π -; we find two solutions for its parameters, depending on the inclusion or not of the X(1835), whose existence is of marginal significance in our data. From a fit to the mass spectrum using coherent X(1835) and η(1760) resonant amplitudes, we set a 90% confidence level upper limit on the product Γ γγB(η ′π +π -) for the X(1835).",

author = "Zhang, {C. C.} and H. Aihara and Asner, {D. M.} and T. Aushev and Bakich, {A. M.} and Y. Ban and K. Belous and M. Bischofberger and Browder, {T. E.} and A. Chen and Cheon, {B. G.} and K. Chilikin and R. Chistov and Y. Choi and J. Dalseno and M. Danilov and S. Eidelman and M. Feindt and V. Gaur and N. Gabyshev and Goh, {Y. M.} and Han, {Y. L.} and H. Hayashii and Y. Horii and Hou, {W. S.} and Hyun, {H. J.} and T. Iijima and K. Inami and A. Ishikawa and M. Iwabuchi and T. Julius and C. Kiesling and Kim, {H. O.} and Kim, {M. J.} and Kim, {Y. J.} and Ko, {B. R.} and P. Kody{\v s} and S. Korpar and P. Krokovny and A. Kuzmin and J. Li and J. Libby and Y. Liu and Liu, {Z. Q.} and R. Louvot and D. Matvienko and S. McOnie and R. Mizuk and E. Nakano and M. Nakao and H. Nakazawa and Z. Natkaniec and S. Nishida and T. Ohshima and S. Okuno and Olsen, {S. L.} and P. Pakhlov and G. Pakhlova and H. Park and Park, {H. K.} and R. Pestotnik and M. Petri{\v c} and Piilonen, {L. E.} and M. R{\"o}hrken and S. Ryu and H. Sahoo and Y. Sakai and D. Santel and T. Sanuki and O. Schneider and C. Schwanda and Sevior, {M. E.} and M. Shapkin and V. Shebalin and Shen, {C. P.} and Shibata, {T. A.} and Shiu, {J. G.} and B. Shwartz and P. Smerkol and Sohn, {Y. S.} and E. Solovieva and S. Stani{\v c} and M. Stari{\v c} and M. Sumihama and T. Sumiyoshi and I. Tikhomirov and M. Uchida and S. Uehara and T. Uglov and Y. Unno and S. Uno and G. Varner and A. Vinokurova and V. Vorobyev and P. Wang and Wang, {X. L.} and Y. Watanabe and Williams, {K. M.} and Yabsley, {B. D.} and Y. Yamashita and Yuan, {C. Z.} and Zhang, {Z. P.} and V. Zhulanov",

year = "2012",

month = sep,

day = "10",

doi = "10.1103/PhysRevD.86.052002",

language = "English",

volume = "86",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "5",

}

TY - JOUR

T1 - First study of η c(1S), η(1760) and X(1835) production via η ′π +π - final states in two-photon collisions

AU - Zhang, C. C.

AU - Aihara, H.

AU - Asner, D. M.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Ban, Y.

AU - Belous, K.

AU - Bischofberger, M.

AU - Browder, T. E.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Chistov, R.

AU - Choi, Y.

AU - Dalseno, J.

AU - Danilov, M.

AU - Eidelman, S.

AU - Feindt, M.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Goh, Y. M.

AU - Han, Y. L.

AU - Hayashii, H.

AU - Horii, Y.

AU - Hou, W. S.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Iwabuchi, M.

AU - Julius, T.

AU - Kiesling, C.

AU - Kim, H. O.

AU - Kim, M. J.

AU - Kim, Y. J.

AU - Ko, B. R.

AU - Kodyš, P.

AU - Korpar, S.

AU - Krokovny, P.

AU - Kuzmin, A.

AU - Li, J.

AU - Libby, J.

AU - Liu, Y.

AU - Liu, Z. Q.

AU - Louvot, R.

AU - Matvienko, D.

AU - McOnie, S.

AU - Mizuk, R.

AU - Nakano, E.

AU - Nakao, M.

AU - Nakazawa, H.

AU - Natkaniec, Z.

AU - Nishida, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, H.

AU - Park, H. K.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - Röhrken, M.

AU - Ryu, S.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Santel, D.

AU - Sanuki, T.

AU - Schneider, O.

AU - Schwanda, C.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shebalin, V.

AU - Shen, C. P.

AU - Shibata, T. A.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Smerkol, P.

AU - Sohn, Y. S.

AU - Solovieva, E.

AU - Stanič, S.

AU - Starič, M.

AU - Sumihama, M.

AU - Sumiyoshi, T.

AU - Tikhomirov, I.

AU - Uchida, M.

AU - Uehara, S.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Varner, G.

AU - Vinokurova, A.

AU - Vorobyev, V.

AU - Wang, P.

AU - Wang, X. L.

AU - Watanabe, Y.

AU - Williams, K. M.

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Yuan, C. Z.

AU - Zhang, Z. P.

AU - Zhulanov, V.

PY - 2012/9/10

Y1 - 2012/9/10

N2 - The invariant mass spectrum of the η ′π +π - final state produced in two-photon collisions is obtained using a 673fb -1 data sample collected in the vicinity of the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e +e - collider. We observe a clear signal of the η c(1S) and measure its mass and width to be M(η c(1S))=(2982.7±1.8(stat)±2.2(syst)±0.3(model)) MeV/c2 and Γ(η c(1S))=(37.8-5.3+5.8(stat)±2.8(syst) ±1.4(model))MeV/c2. The third error is an uncertainty due to possible interference between the η c(1S) and a nonresonant component. We also report the first evidence for η(1760) decay to η ′π +π -; we find two solutions for its parameters, depending on the inclusion or not of the X(1835), whose existence is of marginal significance in our data. From a fit to the mass spectrum using coherent X(1835) and η(1760) resonant amplitudes, we set a 90% confidence level upper limit on the product Γ γγB(η ′π +π -) for the X(1835).

AB - The invariant mass spectrum of the η ′π +π - final state produced in two-photon collisions is obtained using a 673fb -1 data sample collected in the vicinity of the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e +e - collider. We observe a clear signal of the η c(1S) and measure its mass and width to be M(η c(1S))=(2982.7±1.8(stat)±2.2(syst)±0.3(model)) MeV/c2 and Γ(η c(1S))=(37.8-5.3+5.8(stat)±2.8(syst) ±1.4(model))MeV/c2. The third error is an uncertainty due to possible interference between the η c(1S) and a nonresonant component. We also report the first evidence for η(1760) decay to η ′π +π -; we find two solutions for its parameters, depending on the inclusion or not of the X(1835), whose existence is of marginal significance in our data. From a fit to the mass spectrum using coherent X(1835) and η(1760) resonant amplitudes, we set a 90% confidence level upper limit on the product Γ γγB(η ′π +π -) for the X(1835).

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UR - http://www.scopus.com/inward/citedby.url?scp=84866126847&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.86.052002

DO - 10.1103/PhysRevD.86.052002

M3 - Article

AN - SCOPUS:84866126847

SN - 1550-7998

VL - 86

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 5

M1 - 052002

ER -

First study of η _c(1S), η(1760) and X(1835) production via η ^′π ⁺π ^- final states in two-photon collisions

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