Scalar mesons in radiativeϕ→K0K¯0γdecay

Abstract

We study the radiative φ → K 0 K 0 γ decay within a phenomenological framework by considering the contributions of the f 0 (980) and a 0 (980) scalar resonances. We calculate the branching ratio B(φ → K 0 K 0 γ) by employing the coupling constants g f 0 K + K − and g a 0 K + K − as determined by different experimental groups.

Scalar Mesons in the Decayϕ→K0K̄0γ

“…Considering the total branching ratios, our predictions in two models are not different from each other. Our values obtained here are 1 order of magnitude larger than the experimental result [1] and other theoretical predictions [2,3,4,5,6].…”

“…The existing experimental result for the branching ratio of this decay is BR(φ → K 0 K 0 γ)< 1.9 × 10 −8 [1]. Some theoretical predictions found in literature are BR(φ → K 0K 0 γ)= 1.3 × 10 −8 [2], BR(φ → K 0K 0 γ)= 7.6 × 10 −9 [3], BR(φ → K 0K 0 γ)= 5.0 × 10 −8 [4] BR(φ → K 0K 0 γ)= 7.5 × 10 −8 [5], BR(φ → K 0K 0 γ)= 4.47 × 10 −8 [6] for the φ → K 0K 0 γ decay.…”

Search for the decay phi -> K0 K0bar gamma with the KLOE experiment

“…Ref. [10] repeats the calculation of ref. [6] using the first published KLOE data [21,22], with and without the σ(600) contribution, and gives a large set of values.…”

“…Moreover, interference between the f 0 and a 0 amplitudes may also contribute to the φ → K 0 K 0 γ decay amplitude. Predictions found in literature are mainly based on the decay scheme (2), and give values ranging over a large interval, from few ×10 −9 to 10 −7 [1,2,3,4,5,6,7,8,9,10]. In this respect, a similar decay into charged kaons, φ → K + K − γ, gives less information since the scalar dynamics is masked by the final state radiation.…”

Strong interaction between kaons in the reactions e+e−→K+KLeśniak1, Sobczuk2, Silarski3 et al. 2018Phys. Rev. D0000View full textAdd to dashboardCite

“…* Electronic address:leonard.lesniak@ifj.edu.pl Radiative φ(1020) decays into K Kγ states via the intermediate production of scalar mesons f 0 (980) and a 0 (980) have been theoretically studied already in the late eighties and in nineties of the 20th century [15][16][17][18][19][20][21][22][23][24]. Then, after a construction of the Φ-factory in Italy at Frascati other papers appeared [25][26][27][28][29][30][31][32][33][34]. The KLOE Collaboration has searched for the decay φ(1020) → K 0 K0 γ and obtained an upper limit of the branching fraction equal to 1.9 • 10 −8 [35].…”