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Title: Search for charmonium and charmoniumlike states in {Upsilon}(2S) radiative decays

Abstract

Using a sample of 158x10{sup 6} {Upsilon}(2S) events collected with the Belle detector, charmonium and charmoniumlike states with even charge parity are searched for in {Upsilon}(2S) radiative decays. No significant {chi}{sub cJ} or {eta}{sub c} signal is observed, and the following upper limits at 90% confidence level (C. L.) are obtained: B({Upsilon}(2S){yields}{gamma}{chi}{sub c0})<1.0x10{sup -4}, B({Upsilon}(2S){yields}{gamma}{chi}{sub c1})<3.6x10{sup -6}, B({Upsilon}(2S){yields}{gamma}{chi}{sub c2})<1.5x10{sup -5}, and B({Upsilon}(2S){yields}{gamma}{eta}{sub c})<2.7x10{sup -5}. No significant signal of any charmoniumlike state is observed, and we obtain the limits B({Upsilon}(2S){yields}{gamma}X(3872))xB(X(3872){yields}{pi}{sup +}{pi}{sup -}J/{psi})<0.8x10{sup -6}, B({Upsilon}(2S){yields}{gamma}X(3872))x B(X(3872){yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}J/{psi})<2.4x10{sup -6}, B({Upsilon}(2S){yields}{gamma}X(3915))xB(X(3915){yields}{omega}J/{psi})<2.8x10{sup -6}, B({Upsilon}(2S){yields}{gamma}Y(4140))xB(Y(4140){yields}{phi}J/{psi}))<1.2x10{sup -6}, and B({Upsilon}(2S){yields}{gamma}X(4350))xB(X(4350){yields}{phi}J/{psi}))<1.3x10{sup -6} at 90% C. L.

Authors:
; ;  [1]; ; ; ; ; ; ;  [2]; ; ; ; ; ; ; ; ; ;  [3]
  1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing (China)
  2. Nagoya University, Nagoya (Japan)
  3. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
Publication Date:
OSTI Identifier:
21607733
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 84; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.84.071107; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; CHARMONIUM; ETA MESONS; GAMMA RADIATION; MESONS; OMEGA PARTICLES; PARITY; PIONS MINUS; PIONS PLUS; RADIATIVE DECAY; VECTOR MESONS; BARYONS; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; DECAY; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HYPERONS; IONIZING RADIATIONS; OMEGA BARYONS; PARTICLE DECAY; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS; QUARKONIUM; RADIATIONS; STRANGE PARTICLES

Citation Formats

Wang, X. L., Yuan, C. Z., Wang, P., Shen, C. P., Hayasaka, K., Iijima, T., Miyazaki, Y., Ohshima, T., Senyo, K., Seon, O., Adachi, I., Haba, J., Itoh, R., Iwasaki, Y., Katayama, N., Kichimi, H., Nakao, M., Nishida, S., Sakai, Y., and Trabelsi, K. Search for charmonium and charmoniumlike states in {Upsilon}(2S) radiative decays. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.84.071107.
Wang, X. L., Yuan, C. Z., Wang, P., Shen, C. P., Hayasaka, K., Iijima, T., Miyazaki, Y., Ohshima, T., Senyo, K., Seon, O., Adachi, I., Haba, J., Itoh, R., Iwasaki, Y., Katayama, N., Kichimi, H., Nakao, M., Nishida, S., Sakai, Y., & Trabelsi, K. Search for charmonium and charmoniumlike states in {Upsilon}(2S) radiative decays. United States. doi:10.1103/PHYSREVD.84.071107.
Wang, X. L., Yuan, C. Z., Wang, P., Shen, C. P., Hayasaka, K., Iijima, T., Miyazaki, Y., Ohshima, T., Senyo, K., Seon, O., Adachi, I., Haba, J., Itoh, R., Iwasaki, Y., Katayama, N., Kichimi, H., Nakao, M., Nishida, S., Sakai, Y., and Trabelsi, K. Sat . "Search for charmonium and charmoniumlike states in {Upsilon}(2S) radiative decays". United States. doi:10.1103/PHYSREVD.84.071107.
@article{osti_21607733,
title = {Search for charmonium and charmoniumlike states in {Upsilon}(2S) radiative decays},
author = {Wang, X. L. and Yuan, C. Z. and Wang, P. and Shen, C. P. and Hayasaka, K. and Iijima, T. and Miyazaki, Y. and Ohshima, T. and Senyo, K. and Seon, O. and Adachi, I. and Haba, J. and Itoh, R. and Iwasaki, Y. and Katayama, N. and Kichimi, H. and Nakao, M. and Nishida, S. and Sakai, Y. and Trabelsi, K.},
abstractNote = {Using a sample of 158x10{sup 6} {Upsilon}(2S) events collected with the Belle detector, charmonium and charmoniumlike states with even charge parity are searched for in {Upsilon}(2S) radiative decays. No significant {chi}{sub cJ} or {eta}{sub c} signal is observed, and the following upper limits at 90% confidence level (C. L.) are obtained: B({Upsilon}(2S){yields}{gamma}{chi}{sub c0})<1.0x10{sup -4}, B({Upsilon}(2S){yields}{gamma}{chi}{sub c1})<3.6x10{sup -6}, B({Upsilon}(2S){yields}{gamma}{chi}{sub c2})<1.5x10{sup -5}, and B({Upsilon}(2S){yields}{gamma}{eta}{sub c})<2.7x10{sup -5}. No significant signal of any charmoniumlike state is observed, and we obtain the limits B({Upsilon}(2S){yields}{gamma}X(3872))xB(X(3872){yields}{pi}{sup +}{pi}{sup -}J/{psi})<0.8x10{sup -6}, B({Upsilon}(2S){yields}{gamma}X(3872))x B(X(3872){yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}J/{psi})<2.4x10{sup -6}, B({Upsilon}(2S){yields}{gamma}X(3915))xB(X(3915){yields}{omega}J/{psi})<2.8x10{sup -6}, B({Upsilon}(2S){yields}{gamma}Y(4140))xB(Y(4140){yields}{phi}J/{psi}))<1.2x10{sup -6}, and B({Upsilon}(2S){yields}{gamma}X(4350))xB(X(4350){yields}{phi}J/{psi}))<1.3x10{sup -6} at 90% C. L.},
doi = {10.1103/PHYSREVD.84.071107},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 84,
place = {United States},
year = {2011},
month = {10}
}