Photoproduction of the f2(1270) resonance

Abstract

We have performed a calculation of the γp → π + π − p reaction, where the two pions have been separated in D-wave producing the f2(1270) resonance. We use elements of the local hidden gauge approach that provides the interaction of vector mesons in which the f2(1270) resonance appears as a ρ-ρ molecular state in L = 0 and spin 2. The vector meson dominance, incorporated in the local hidden gauge approach converts a photon into a ρ 0 meson and the other meson connects the photon with the proton. The picture is simple and has no free parameters, since the parameters of the theory have been constrained in the previous study of the vector-vector states. In a second step we introduce new elements, not present in the local hidden gauge approach, adapting the ρ propagator to Regge phenomenology and introducing the ρN N tensor coupling. We find that both the differential cross section as well as the t dependence of the cross section are in good agreement with the experimental results and provide support for the molecular picture of the f2(1270) in the first baryonic reaction where it has been tested.

f2(1810) as a triangle singularity

“…The coupling of the f 2 (1640) has the structure of a tensor [27,30], where the polarizations of K * K * couple to J = 2 but in L = 0. We have…”

On the chiral covariant approach to ρρ scattering

“…Yet, the fact remains that the molecular picture has successfully undergone far more tests than the quark model, comparing predictions with practically all observables related to the resonance (see detailed discussions in the introduction of Refs. [21,22]). The developments of the present work in Section 4 will further reinforce this picture.…”

Weak decay ofΛc+for the study ofΛ(1405)andΛMiyahara1, Hyodo2, Oset3 2015Phys. Rev. C612651View full textAdd to dashboardCite

“…Meanwhile, it has been shown in recent studies that the selection of the particular modes is possible in the nonleptonic weak decays of heavy hadrons [34][35][36][37][38][39][40][41][42][43][44]. Among others, of particular importance is the study of the Λ b → J/ψΛ(1405) decay, where the Λ(1405) is generated in the final-state interaction of the meson-baryon pair [44,45].…”