By analyzing e(+)e(-) collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3 fb(-1), we measure the branching fractions of the doubly Cabibbo-suppressed (DCS) decays D-0 -> K+pi(-), D-0 -> K+pi(-)pi(-)pi(+), D-0 -> K+pi(-)pi(0), D-0 -> K+pi(-)pi(0)pi(0), D+-> K+pi(+)pi(-), and D+-> K+K+K-. We also perform the first searches for D-0 -> K+pi(-)eta, D-0 -> K+pi(-)pi(0)eta, D+-> K+pi(+)pi(-)eta, D+ -> K+ (pi(+)pi(-)eta)(non-eta '), and D+ -> K+eta eta and report the first observations and evidence for some of these final states. Combining the measurements with the world averages of the corresponding Cabibbo-favored (CF) decays, the ratios of the DCS/CF branching fractions are obtained. For the D+ -> K+ (pi(+)pi(-)eta)(non-eta ') decay, the ratio is significantly larger than the corresponding ratios of the other DCS decays.
Measurement of the branching fractions of doubly Cabibbo-suppressed D decays
A. Amoroso;F. Bianchi;A. Bortone;M. Destefanis;F. De Mori;M. Greco;L. Lavezzi;M. Maggiora;S. Marcello;S. Sosio;S. Spataro;
2025-01-01
Abstract
By analyzing e(+)e(-) collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3 fb(-1), we measure the branching fractions of the doubly Cabibbo-suppressed (DCS) decays D-0 -> K+pi(-), D-0 -> K+pi(-)pi(-)pi(+), D-0 -> K+pi(-)pi(0), D-0 -> K+pi(-)pi(0)pi(0), D+-> K+pi(+)pi(-), and D+-> K+K+K-. We also perform the first searches for D-0 -> K+pi(-)eta, D-0 -> K+pi(-)pi(0)eta, D+-> K+pi(+)pi(-)eta, D+ -> K+ (pi(+)pi(-)eta)(non-eta '), and D+ -> K+eta eta and report the first observations and evidence for some of these final states. Combining the measurements with the world averages of the corresponding Cabibbo-favored (CF) decays, the ratios of the DCS/CF branching fractions are obtained. For the D+ -> K+ (pi(+)pi(-)eta)(non-eta ') decay, the ratio is significantly larger than the corresponding ratios of the other DCS decays.| File | Dimensione | Formato | |
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JHEP06(2025)220.pdf
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