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DOI: 10.5445/IR/1000089225
Veröffentlicht am 08.01.2019

Observation of e⁺e⁻ → γχ$_{cl}$ and search for e⁺e⁻ → γχ$_{c0}$, γχ$_{c2}$ and γη$_{c}$ at √s near 10.6 GeV at Belle

Belle Collaboration; Jia, S.; Wang, X. L.; Shen, C. P.; Yuan, C. Z.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Bansal, V.; Behera, P.; Beleño, C.; Berger, M.; Bhuyan, B.; Bilka, T.; Biswal, J.; ... mehr

Abstract:
Using data samples of 89.5  fb−1, 711.0  fb−1, and 121.4  fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions e+e−→γχcJ (J=0, 1, 2) and e+e−→γηc. A significant γχc1 signal is observed for the first time at √s=10.58  GeV with a significance of 5.1σ including systematic uncertainties. No significant excesses for γχc0, γχc2, and γηc final states are found, and we set 90% credibility level upper limits on the Born cross sections (σB) at 10.52 GeV, 10.58 GeV, and 10.867 GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of σB(e+e−→γχc1) is obtained.


Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2470-0010, 2470-0029
URN: urn:nbn:de:swb:90-892256
KITopen-ID: 1000089225
Erschienen in Physical review / D
Band 98
Heft 9
Seiten Article: 092015
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 30.11.2018
Nachgewiesen in Web of Science
Scopus
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