HADRON PHYSICS AT KLOE AND KLOE-2 C. Di Donato on Behalf of KLOE and KLOE-2 Collaborations

KLOE data allow to study many interesting processes related to light mesons. Several item have been investigated, among them we present the recently published search for the U boson produced with η meson and the last results on the dynamics of the η → pi+pi−γ decay. The KLOE-2 project aims to extend the KLOE program with detector upgrades and increased statistics: we describe the status of the art. 1 KLOE and DAΦNE The e+e − collider DAΦNE, designed to operate at the center of mass energy s " 1.02 GeV, the φ meson mass, has delivered to the KLOE experiment an integrated luminosity of about 2.5fb−1 on peak of the φ meson and also about 240pb−1 at s " 1 GeV. The KLOE detector consists of a large volume cylindrical drift chamber 1 (DC), 3.3 m length and 2 m radius, surrounded by a calorimeter 2 (EMC) made of lead and scintillating fibers. A superconducting coil produces an axial field B = 0.52 T. In the DC charged particle momenta are reconstructed with resolution σp/p " 0.4%, while in the EMC energy clusters are reconstructed grouping calorimeter cells close in space and in time with energy and time resolution of σE/E = 5.7%/ E(GeV) and σt = 57ps/ E(GeV) ⊕ 100 ps