Using a large sample of charm semileptonic decays collected by the FOCUS photoproduction experiment at Fermilab, we present evidence for a small, even spin K -π + amplitude that interferes with the dominant K* 0 component in the D + → K -π +μ +ν final state. Although this interference significantly distorts the D + → K -π +μ +ν decay angular distributions, the new amplitude creates only a very small distortion to the observed kaon pion mass distribution when integrated over the other kinematic variables describing the decay. Our data can be described by K* 0 interference with either a constant amplitude or broad spin zero resonance.

Link, J., Reyes, M., Yager, P., Anjos, J., Bediaga, I., Gobel, C., et al. (2002). Evidence for new interference phenomena in the decay D + → K -π +μ +ν. PHYSICS LETTERS. SECTION B, 535(1-4), 43-51 [10.1016/S0370-2693(02)01715-X].

Evidence for new interference phenomena in the decay D + → K -π +μ +ν

Gianini G;
2002

Abstract

Using a large sample of charm semileptonic decays collected by the FOCUS photoproduction experiment at Fermilab, we present evidence for a small, even spin K -π + amplitude that interferes with the dominant K* 0 component in the D + → K -π +μ +ν final state. Although this interference significantly distorts the D + → K -π +μ +ν decay angular distributions, the new amplitude creates only a very small distortion to the observed kaon pion mass distribution when integrated over the other kinematic variables describing the decay. Our data can be described by K* 0 interference with either a constant amplitude or broad spin zero resonance.
Articolo in rivista - Articolo scientifico
amplitude modulation; article; electron spin resonance; experiment; kinematics; physics
English
2002
535
1-4
43
51
none
Link, J., Reyes, M., Yager, P., Anjos, J., Bediaga, I., Gobel, C., et al. (2002). Evidence for new interference phenomena in the decay D + → K -π +μ +ν. PHYSICS LETTERS. SECTION B, 535(1-4), 43-51 [10.1016/S0370-2693(02)01715-X].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/455744
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