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Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state

文献类型:期刊论文

作者Ablikim, M.1; Achasov, M. N.9,66; Ahmed, S.14; Ai, X. C.1; Albayrak, O.5; Albrecht, M.4; Ambrose, D. J.50; Amoroso, A.55,57,62; An, F. F.1; An, Q.52,62
刊名Physical review d
出版日期2017-12-07
卷号96期号:11页码:8
ISSN号2470-0010
DOI10.1103/physrevd.96.111102
通讯作者Ablikim, m.()
英文摘要The decays of chi(c2) -> k+k- pi(0), ksk +/-pi(-/+), and pi(+)pi(-)pi(0) are studied with the psi(3686) data samples collected with the beijing spectrometer ( besiii). for the first time, the branching fractions of chi(c2) -> k*(k) over bar,chi(c2) -> a(2)(+/-)(1320)pi(-/+)/a(2)(0)(1320)pi(0), and chi(c2) -> rho(770)(+/-)pi(-/+) are measured. here, k*(k) over bar denotes both k*k-+/-(-/+) and its isospin-conjugated process k*(0)(k) over bar (0) + c: c:, and k* denotes the resonances k*(892), k*(2)(1430), and k*(3)(1780). the observations indicate a strong violation of the helicity selection rule in chi(c2) decays into vector and pseudoscalar meson pairs. the measured branching fractions of chi(c2) -> k*(892)(k) over bar are more than ten times larger than the upper limit of chi(c2) -> rho(770)(+/-)pi(-/+), which is so far the first direct observation of a significant u-spin symmetry breaking effect in charmonium decays.
WOS关键词TENSOR FORMALISM ; MESONS
WOS研究方向Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000417477400001
URI标识http://www.irgrid.ac.cn/handle/1471x/2178285
专题高能物理研究所
通讯作者Ablikim, M.
作者单位1.Inst High Energy Phys, Beijing 100049, Peoples R China
2.Beihang Univ, Beijing 100191, Peoples R China
3.Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China
4.Bochum Ruhr Univ, D-44780 Bochum, Germany
5.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
6.Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China
7.China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
8.COMSATS Inst Informat Technol, Def Rd,Raiwind Rd, Lahore 54000, Pakistan
9.GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia
10.GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany
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GB/T 7714
Ablikim, M.,Achasov, M. N.,Ahmed, S.,et al. Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state[J]. Physical review d,2017,96(11):8.
APA Ablikim, M..,Achasov, M. N..,Ahmed, S..,Ai, X. C..,Albayrak, O..,...&Zou, J. H..(2017).Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state.Physical review d,96(11),8.
MLA Ablikim, M.,et al."Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state".Physical review d 96.11(2017):8.

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