Observation of ψ (3686) →e+e-χcJ and χcJ →e+e-J /ψ
Using 4.479 × 108 ψð3686Þ events collected with the BESIII detector, we search for the decays ψð3686Þ → eþe−χcJ and χcJ → eþe−J=ψ, where J ¼ 0, 1, 2. The decays ψð3686Þ → eþe−χcJ and χcJ → eþe−J=ψ are observed for the first time. The measured branching fractions are B(ψð3686Þ → eþe−χcJ) ¼ ð11.7 2.5...
| Published in: | Physical Review Letters Vol. 118, № 22. P. 221802-1-221802-8 |
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| Other Authors: | , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000583380 Перейти в каталог НБ ТГУ |
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| 008 | 171004|2017 xxu s a eng d | ||
| 024 | 7 | |a 10.1103/PhysRevLett.118.221802 |2 doi | |
| 035 | |a to000583380 | ||
| 039 | 9 | |a 201710170958 |c 201710041539 |d VLOAD |y 201710041507 |z Александр Эльверович Гилязов | |
| 040 | |a RU-ToGU |b rus |c RU-ToGU | ||
| 245 | 1 | 0 | |a Observation of ψ (3686) →e+e-χcJ and χcJ →e+e-J /ψ |c M. Ablikim, M. N. Achasov, X. C. Ai [et.al.] |
| 504 | |a Библиогр.: 26 назв. | ||
| 520 | 3 | |a Using 4.479 × 108 ψð3686Þ events collected with the BESIII detector, we search for the decays ψð3686Þ → eþe−χcJ and χcJ → eþe−J=ψ, where J ¼ 0, 1, 2. The decays ψð3686Þ → eþe−χcJ and χcJ → eþe−J=ψ are observed for the first time. The measured branching fractions are B(ψð3686Þ → eþe−χcJ) ¼ ð11.7 2.5 1.0Þ × 10−4, ð8.6 0.3 0.6Þ × 10−4, ð6.9 0.5 0.6Þ × 10−4 for J ¼ 0, 1, 2, and BðχcJ →eþe−J=ψÞ¼ð1.510.300.13Þ×10−4, ð3.730.090.25Þ×10−3, ð2.480.080.16Þ×10−3 for J ¼ 0, 1, 2, respectively. The ratios of the branching fractions B(ψð3686Þ → eþe−χcJ)=B(ψð3686Þ → γχcJ) and B(χcJ → eþe−J=ψ)=B(χcJ → γJ=ψ) are also reported. Also, the α values of helicity angular distributions of the eþe− pair are determined for ψð3686Þ → eþe−χc1;2 and χc1;2 → eþe−J=ψ. | |
| 653 | |a BESIII, детектор | ||
| 653 | |a BEPCII, коллайдер | ||
| 655 | 4 | |a статьи в журналах |9 879358 | |
| 700 | 1 | |a Ablikim, M. |9 117568 | |
| 700 | 1 | |a Ai, X. C. |9 117570 | |
| 700 | 1 | |a Chelkov, G. A. |9 96983 | |
| 700 | 1 | |a Achasov, M. N. |9 117569 | |
| 773 | 0 | |t Physical Review Letters |d 2017 |g Vol. 118, № 22. P. 221802-1-221802-8 |x 0031-9007 | |
| 852 | 4 | |a RU-ToGU | |
| 856 | 7 | |u http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000583380 | |
| 856 | |y Перейти в каталог НБ ТГУ |u https://koha.lib.tsu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=427473 | ||
| 908 | |a статья | ||
| 999 | |c 427473 |d 427473 | ||