{ital c}{r_arrow}{ital u}{gamma} in Cabibbo suppressed {ital D} meson radiative weak decays

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.5883· OSTI ID:392066

Bajc, B; Fajfer, S ^[1]; Oakes, R J ^[2]

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1. J. Stefan Institute, Jamova 39, P.O. Box 3000, 1001 Ljubljana (Slovenia)
2. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)

We investigate Cabibbo suppressed {ital D}{sup 0}, {ital D}{sup +}, and {ital D}{sup +}{sub {ital s}} radiative weak decays in order to find the best mode to test {ital c}{r_arrow}{ital u}{gamma} decay. Combining heavy quark effective theory and the chiral Lagrangian approach we determine the decay widths. We calculate {Gamma}({ital D}{sup 0}{r_arrow}{rho}{sup 0}/{omega}{gamma})/{Gamma}({ital D}{sup 0}{r_arrow}{ital {bar K}}{sup {asterisk}0}{gamma}), previously proposed to search for possible new physics. However, we notice that there are large, unknown, corrections within the standard model. We propose a better alternative, the ratio {Gamma}({ital D}{sup +}{sub {ital s}}{r_arrow}{ital K}{sup {asterisk}+}{gamma})/{Gamma}({ital D}{sup +}{sub {ital s}}{r_arrow}{rho}{sup +}{gamma}), and show that it is less sensitive to the standard model. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Northwestern University
• DOE Contract Number: FG02-91ER40684
• OSTI ID: 392066
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
C QUARKS
CHIRAL SYMMETRY
D NEUTRAL MESONS
D PLUS MESONS
D S MESONS
LAGRANGIAN FUNCTION
RADIATIVE DECAY
STANDARD MODEL
U QUARKS