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  • Ablikim, M.Inst High Energy Phys, Beijing 100049, Peoples R China (author)

Improved measurement of the strong-phase difference delta(K pi )(D)in quantum-correlated D(D)over-bar decays

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-11-09
  • Springer Nature,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-490752
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-490752URI
  • https://doi.org/10.1140/epjc/s10052-022-10872-2DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • For complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-022-10872-2
  • The decay D -> K-pi(+) is studied in a sample of quantum-correlated D (D) over bar pairs, based on a data set corresponding to an integrated luminosity of 2.93 fb(-1) collected at the psi(3770) resonance by the BESIII experiment. The asym- metry between CP-odd and CP-even eigenstate decays into K-pi(+) is determined to be A(K pi) = 0.132 +/- 0.011 +/- 0.007, where the first uncertainty is statistical and the second is systematic. This measurement is an update of an earlier study exploiting additional tagging modes, including several decay modes involving a K-L(0) meson. The branching fractions of the K-L(0) modes are determined as input to the analysis in a manner that is independent of any strong phase uncertainty. Using the predominantly CP-even tag D -> pi(+)pi(-)pi(0) and the ensemble of CP-odd eigenstate tags, the observable A(K pi)(pi pi pi 0) is measured to be 0.130 +/- 0.012 +/- 0.008. The two asymmetries are sensitive to r(D)(K pi) delta(K)(pi)(D), where r(D)(K pi) and S-D(K pi) are the ratio of amplitudes and phase difference, respectively, between the doubly Cabibbo-suppressed and Cabibbofavoured decays. In addition, events containing D -> K-pi(+) tagged by D -> K-S,L(0) pi(+)pi(-) are studied in bins of phase space of the three-body decays. This analysis has sensitivity to both r(D)(K pi) cos delta(K)(pi)(D) and r(D)(K pi) sin delta(K)(pi)(D). A fit to A(K pi), A(K pi)(pi pi pi 0) and the phase-space distribution of the D -> K-S,L(0) pi(+)pi(-) tags yields delta(K)(pi)(D) = (187.6(-9.7-6.4)(+8.9+5.4))degrees , where external con- straints are applied for r(D)(K pi) and other relevant parameters. This is the most precise measurement of delta(K)(pi)(D) in quantumcorrelated D (D) over bar decays.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Adlarson, PatrikUppsala universitet,Kärnfysik(Swepub:uu)patad399 (author)
  • Johansson, TordUppsala universitet,Kärnfysik(Swepub:uu)tordjoha (author)
  • Kupsc, AndrzejUppsala universitet,Kärnfysik,Natl Ctr Nucl Res, PL-02093 Warsaw, Poland(Swepub:uu)andrkups (author)
  • Pettersson, JoachimUppsala universitet,Kärnfysik (author)
  • Schönning, Karin,1978-Uppsala universitet,Kärnfysik(Swepub:uu)kasch734 (author)
  • Thorén, ViktorUppsala universitet,Kärnfysik(Swepub:uu)vikth925 (author)
  • Wolke, MagnusUppsala universitet,Kärnfysik(Swepub:uu)mawol031 (author)
  • Zou, J. H.Inst High Energy Phys, Beijing 100049, Peoples R China (author)
  • Inst High Energy Phys, Beijing 100049, Peoples R ChinaKärnfysik (creator_code:org_t)

Related titles

  • In:European Physical Journal C: Springer Nature821434-60441434-6052

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