We use K(L)'s in the 100-200 GeV energy range to produce 147 candidate events of the axial vector pair K1(1270)-K1(1400) in the nuclear Coulomb field of a Pb target and determine the radiative widths Gamma(K1(1400)-->K0+gamma)=280.8+/-23.2(stat)+/-40.4(syst) keV and Gamma(K1(1270)-->K0+gamma)=73.2+/-6.1(stat)+/-28.3(syst) keV. These first measurements appear to be lower than the quark-model pre...

Reported for the first time is picosecond-range pulse generation in an all-fibre Raman laser based on P₂O₅-doped silica fibre. Employment of phosphor-silicate fibre made possible single-cascade spectral transformation of pumping pulses at 1084 nm into 270-ps long Raman laser pulses at 1270 nm. The highest observed fraction of the Stokes component radiation at 1270 nm in the total output of the ...

In the f2(1270)−f ′ 2(1525) mixing framework, the isoscalar singlet-octet mixing angle for 1 P2 tensor nonet is determined to the value of 27.5◦ and the decays of the two states are investigated. Comparing the predicted results of the decays of the two states with the available experimental data, we find that the predicted results are in good agreement with the experimental data, which shows th...

Based on the BESIII measurements reaction of $D_s^+\to \pi^+\pi^0\pi^0$, we investigate this process by considering $S$-wave pseudoscalar-pseudoscalar interaction within unitary chiral approach, and contributions from intermediate resonances $f_0(1370)$ $f_2(1270)$. Our calculation could reasonably reproduce experimental data, our results imply that $f_0(980)$, dynamically generated interaction...

Within chiral perturbation theory, we study elastic pion scattering in the I50,J52, channel, whose main features are the f (1270) resonance and the vanishing of the lowest order. By means of a chiral model that includes an explicit resonance coupled to pions, we describe the data and calculate the resonance contribution to the O(p) and O(p) chiral parameters. We also generalize the inverse ampl...

The mass eigen states K1(1270) and K1(1400) are mixture of the strange members of two axial-vector SU(3) octet, P1(K A 1 ) and P1(K B 1 ). Taking into account this mixture, the forward-backward asymmetry and branching ratio of B → K1(1270, 1400) l+l− transitions are studied in the framework of different supersymmetric models. It is found that the results have considerable deviation from the sta...

Abstract In 2017, LHCb collaboration reported their first observation of the rare decays $$B_s \rightarrow \phi (f_0(980)$$ Bs→ϕ(f0<mml:mo...