Measurements ofe+e−→K+K−η,K+

Abstract

This paper reports measurements of processes: e + e − → γK− → γφη and e + e − → γφπ 0 . The initial state radiated photon allows to cover the hadronic final state in the energy range from thresholds up to ≈ 4.6 GeV. The overall size of the data sample analyzed is 232 fb −1 , collected by the BABAR detector running at the PEP-II e + e − storage ring. From the Dalitz plot analysis of the K 0 S K ± π ∓ final state, moduli and relative phase of the isoscalar and the isovector components of the e + e − → KK * (892) cross section are determined. Parameters of φ and ρ recurrences are also measured, using a global fitting procedure which exploits the interconnection among amplitudes, moduli and phases of theThe cross section for the OZI-forbidden process e + e − → φπ 0 , and the J/ψ branching fractions to KK * (892) and K + K − η are also measured.

Cross sections for the reactions e+e−→KS0Lees1, Poireau2, Tisserand3 et al. 2017Phys. Rev. DSelf Cite18090View full textAdd to dashboardCite

“…The solid line represents the result of the fit described in the text. The results are consistent with those observed in our previous study of the K þ K − π 0 final state [15], also shown in Fig. 8 (circles).…”

“…12 as the points. It is consistent with our previous measurement [15] in the K þ K − η final state (circles). Again, only statistical uncertainties are shown, and they are larger than the 15%-30% systematic uncertainties.…”

“…L η cross section is measured with 15%-30% systematic uncertainty below 3 GeV and is similar to the e þ e − → K þ K − η cross section [15] [16]. Its E c:m: behavior is similar in shape to the We observe the J=ψ → K …”

“…The X h studied so far include charged hadron pairs π þ π − [7], [8], and pp [9]; four or six charged mesons [10][11][12]; charged mesons plus one or two π 0 mesons [11][12][13][14]; a K 0 S plus charged and neutral mesons [15]; and the first ISR measurement from BABAR that includes K 0 L mesons [16]. Together, they demonstrate good detector efficiency for events of this kind and well-understood tracking, particle identification, and π 0 , K For these final states, we measure cross sections from threshold to E c:m: ¼ 4 GeV, study their internal structure, perform the first measurements of J=ψ branching fractions, and search for ψð2SÞ decays.…”

Measurement of the e+e−→KSKLАчасов1, Aulchenko2, Barnyakov3 et al. 2018Phys. Rev. D14060View full textAdd to dashboardCite

“…Processes of e þ e − annihilation to the KKπ final state were studied in the DM1, DM2, and BABAR [1][2][3][4] experiments. Until recently, only the two subprocesses e þ e − → K S K AE π ∓ and K þ K − π 0 [3] were measured. The third, neutral subprocess e þ e − → K S K L π 0 is hard to study due to the complexity of K L -meson detection and identification.…”