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Study of the hc(11P1) meson via ψ(2S)→π0hc decays at BESIII
Study of the hc(11P1) meson via ψ(2S)→π0hc decays at BESIII
Using 448 million ψ(2S) events, the spin-singlet P-wave charmonium state hc(1P11) is studied via the ψ(2S)→π0hc decay followed by the hc→γηc transition. The branching fractions are measured to be BInc(ψ(2S)→π0hc)×BTag(hc→γηc)=(4.22−0.26+0.27±0.19)×10−4, BInc(ψ(2S)→π0hc)=(7.32±0.34±0.41)×10−4, and BTag(hc→γηc)=(57.66−3.50+3.62±0.58)%, where the uncertainties are statistical and systematic, respectively. The hc(1P11) mass and width are determined to be M=(3525.32±0.06±0.15) MeV/c2 and Γ=(0.78−0.24+0.27±0.12) MeV. Using the center of gravity mass of the three χcJ(13PJ) mesons [M(c.o.g.)], the 1P hyperfine mass splitting is estimated to be Δhyp=M(hc)−M(c.o.g.)=(0.03±0.06±0.15) MeV/c2, which is consistent with the expectation that the 1P hyperfine splitting is zero at the lowest order.
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).0 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).0 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average
Citations provided by BIP!Popularity provided by BIP!Using 448 million ψ(2S) events, the spin-singlet P-wave charmonium state hc(1P11) is studied via the ψ(2S)→π0hc decay followed by the hc→γηc transition. The branching fractions are measured to be BInc(ψ(2S)→π0hc)×BTag(hc→γηc)=(4.22−0.26+0.27±0.19)×10−4, BInc(ψ(2S)→π0hc)=(7.32±0.34±0.41)×10−4, and BTag(hc→γηc)=(57.66−3.50+3.62±0.58)%, where the uncertainties are statistical and systematic, respectively. The hc(1P11) mass and width are determined to be M=(3525.32±0.06±0.15) MeV/c2 and Γ=(0.78−0.24+0.27±0.12) MeV. Using the center of gravity mass of the three χcJ(13PJ) mesons [M(c.o.g.)], the 1P hyperfine mass splitting is estimated to be Δhyp=M(hc)−M(c.o.g.)=(0.03±0.06±0.15) MeV/c2, which is consistent with the expectation that the 1P hyperfine splitting is zero at the lowest order.