Experimental Study of Three-body Cabibbo-suppressed D0 Decays and Extraction of Cp Violation Parameters

Study of the D[sup 0]→π[sup +]π[sup −]π[sup 0] decay at BABAR

“…The cuts applied for selecting the D 0 → π + π − π 0 candidates are [2]: (i) charged tracks with p T > 100 MeV/c; (ii) particle identification compatibile with a charged pion; (iii) E γ > 100 MeV; (iv) 115 < M (γγ) < 150 MeV/c 2 ; (v) E(γγ) > 350 MeV; (vi) D 0 vertex fit with P (χ 2 ) > 0.5%; (vii) 1848 < M (D 0 ) < 1880 MeV/c 2 ; (viii) D 0 generated by the D * + decay and selected with the cut |M (D * + ) − M (D 0 ) − 145.4| < 0.6 MeV/c 2 ; (ix) D 0 momentum in the e + e − c.m.s. p * > 2.77 MeV/c; (x) exclusion of the events with 489 < M (π…”