Yayın: Measurement of <i>b</i>(ψ(3770) → γχ<sub><i>c</i>1</sub>) and search for ψ(3770) → γχ<sub><i>c</i>2</sub>
Tarih
Kurum Yazarları
TAPAN, İBRAHİM
Yazarlar
Ablikim, M.
Achasov, M. N.
Ai, X. C.
Albayrak, O.
Albrecht, M.
Ambrose, D. J.
Amoroso, A.
An, F. F.
An, Q.
Bai, J. Z.
Danışman
Dil
Türü
Yayıncı:
American Physical Society
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Özet
We report a measurement of the branching fraction for psi(3770) -> gamma chi(c1) and search for the transition psi(3770) -> gamma chi(c2) based on 2.92 fb(-1) of e(+)e(-) data accumulated at root s = 3.773 GeV with the BESIII detector at the BEPCII collider. We measure B(psi(3770) -> gamma chi(c1)) = (2.48 +/- 0.15 +/- 0.23) x 10(-3), which is the most precise measurement to date. The upper limit on the branching fraction of psi(3770) -> gamma chi(c2) at a 90% confidence level is B(psi(3770) -> gamma chi(c2)) < 0.64 x 10(-3). The corresponding partial widths are Gamma(psi(3770) -> gamma chi(c1)) = (67.5 +/- 4.1 +/- 6.7)keV and Gamma(psi(3770) -> gamma chi(c2)) < 17.4 keV.
Açıklama
Kaynak:
Anahtar Kelimeler:
Konusu
Cross-section, Open charm, Decay, Generator, States, Science & technology, Physical sciences, Astronomy & astrophysics, Physics, particles & fields, Physics