Measurement of e(+)e(-) -> D(D)over-bar cross sections at the psi(3770) resonance
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Dosyalar
Tarih
2018-08
Yazarlar
Dergi Başlığı
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Yayıncı
IOP PUBLISHING LTD
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
We report new measurements of the cross sections for the production of D (D) over bar final states at the psi(3770) resonance. Our data sample consists of an integrated luminosity of 2.93 fb(-1) of e(+)e(-) annihilation data produced by the BEPCII collider and collected and analyzed with the BESIII detector. We exclusively reconstruct three D-0 and six D+ hadronic decay modes and use the ratio of the yield of fully reconstructed D (D) over bar events ("double tags") to the yield of all reconstructed D or (D) over bar mesons ("single tags") to determine the number of D-0(D) over bar (0) and D+D- events, benefiting from the cancellation of many systematic uncertainties. Combining these yields with an independent determination of the integrated luminosity of the data sample, we find the cross sections to be sigma(e(+)e(-) -> D-0(D) over bar (0-) )=(3.615 +/- 0.010 +/- 0.038) nb and sigma(e(+)e(-) -> D+D-)=(2.830 +/- 0.011 +/- 0.026) nb, where the uncertainties are statistical and systematic, respectively.
Açıklama
Anahtar Kelimeler
charm mesons, cross sections, BESIII/BEPCII
Kaynak
CHINESE PHYSICS C
WoS Q Değeri
Q1
