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Amplitude analysis of D0 →k-π+π+π- M. Ablikim, M. N. Achasov, S. Ahmed [et.al.]

Contributor(s): Ablikim, M | Ahmed, S | Chelkov, G. A | Achasov, M. NMaterial type: ArticleArticleSubject(s): амплитудный анализ | BESIII, детекторGenre/Form: статьи в журналах Online resources: Click here to access online In: Physical Review D Vol. 95, № 7. P. 072010-1-072010-16Abstract: We present an amplitude analysis of the decay D0 → K−πþπþπ− based on a data sample of 2.93 fb−1 acquired by the BESIII detector at the ψð3770Þ resonance. With a nearly background free sample of about 16000 events, we investigate the substructure of the decay and determine the relative fractions and the phases among the different intermediate processes. Our amplitude model includes the two-body decays D0 → K¯ 0ρ0, D0 → K−aþ 1 ð1260Þ and D0 → K−1 ð1270Þπþ, the three-body decays D0 → K¯ 0πþπ− and D0 → K−πþρ0, as well as the four-body nonresonant decay D0 → K−πþπþπ−. The dominant intermediate process is D0 → K−aþ 1 ð1260Þ, accounting for a fit fraction of 54.6%.
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We present an amplitude analysis of the decay D0 → K−πþπþπ− based on a data sample of 2.93 fb−1 acquired by the BESIII detector at the ψð3770Þ resonance. With a nearly background free sample of about 16000 events, we investigate the substructure of the decay and determine the relative fractions and the phases among the different intermediate processes. Our amplitude model includes the two-body decays D0 → K¯ 0ρ0, D0 → K−aþ 1 ð1260Þ and D0 → K−1 ð1270Þπþ, the three-body decays D0 → K¯ 0πþπ− and D0 → K−πþρ0, as well as the four-body nonresonant decay D0 → K−πþπþπ−. The dominant intermediate process is D0 → K−aþ 1 ð1260Þ, accounting for a fit fraction of 54.6%.

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