Eur. Phys. J. C (2010) 66: 11-16
https://doi.org/10.1140/epjc/s10052-010-1245-2

Regular Article - Experimental Physics

Search for ψ(3770)→ charmless final states involving η or π ⁰ mesons

¹ Institute of High Energy Physics, Beijing, 100049, People’s Republic of China
² China Center for Advanced Science and Technology (CCAST), Beijing, 100080, People’s Republic of China
³ Guangxi Normal University, Guilin, 541004, People’s Republic of China
⁴ Guangxi University, Nanning, 530004, People’s Republic of China
⁵ Henan Normal University, Xinxiang, 453002, People’s Republic of China
⁶ Huazhong Normal University, Wuhan, 430079, People’s Republic of China
⁷ Hunan University, Changsha, 410082, People’s Republic of China
⁸ Liaoning University, Shenyang, 110036, People’s Republic of China
⁹ Nanjing Normal University, Nanjing, 210097, People’s Republic of China
¹⁰ Nankai University, Tianjin, 300071, People’s Republic of China
¹¹ Peking University, Beijing, 100871, People’s Republic of China
¹² Shandong University, Jinan, 250100, People’s Republic of China
¹³ Sichuan University, Chengdu, 610064, People’s Republic of China
¹⁴ Tsinghua University, Beijing, 100084, People’s Republic of China
¹⁵ University of Science and Technology of China, Hefei, 230026, People’s Republic of China
¹⁶ Wuhan University, Wuhan, 430072, People’s Republic of China
¹⁷ Zhejiang University, Hangzhou, 310028, People’s Republic of China
¹⁸ Zhengzhou University, Zhengzhou, 450001, People’s Republic of China
¹⁹ University of Oklahoma, Norman, OK, 73019, USA
²⁰ University of Hong Kong, Pok Fu Lam Road, Hong Kong, Hong Kong
²¹ Graduate University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

Received: 1 October 2009
Revised: 31 December 2009
Published online: 21 January 2010

Abstract

We search for ψ(3770)→π ⁺ π ⁻ η, K ⁺ K ⁻ η, , ρ ⁰ π ⁺ π ⁻ η, K ⁺ K ⁻ π ⁺ π ⁻ η, , and using data samples of 17.3 and 6.5 pb⁻¹ integrated luminosities recorded at the center-of-mass energies of 3.773 and 3.65 GeV, respectively, by the BES-II detector operating at the BEPC collider. We obtain cross section measurements at both energies and upper limits on ψ(3770) decay branching fractions to the final states studied.