SwePub
Sök i LIBRIS databas

  Extended search

id:"swepub:oai:DiVA.org:uu-446895"
 

Search: id:"swepub:oai:DiVA.org:uu-446895" > Measurement of the ...

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist
  • Ablikim, M.Inst High Energy Phys, Beijing 100049, Peoples R China (author)

Measurement of the branching fraction of and search for a CP-violating asymmetry in η′ → π+π−e+e− at BESIII

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • American Physical Society,2021
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-446895
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446895URI
  • https://doi.org/10.1103/PhysRevD.103.092005DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

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

Notes

  • For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.103.092005
  • The rare decay η′ → π+π−e+e− is studied using a sample of 1.3×109  J/ψ events collected with the BESIII detector at BEPCII in 2009 and 2012. The branching fraction is measured with improved precision to be (2.42±0.05stat±0.08syst)×10−3. Due to the inclusion of new data, this result supersedes the last BESIII result on this branching fraction. In addition, the CP-violating asymmetry in the angle between the decay planes of the π+π−-pair and the e+e−-pair is investigated. A measurable value would indicate physics beyond the standard model; the result is ACP=(2.9±3.7stat±1.1syst)%, which is consistent with the standard model expectation of no CP-violation. The precision is comparable to the asymmetry measurement in the K0L → π+π−e+e− decay where the observed (14±2)% effect is driven by a standard model mechanism.

Subject headings and genre

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

  • Adlarson, PatrikUppsala universitet,Kärnfysik(Swepub:uu)patad399 (author)
  • Biernat, JacekUppsala universitet,Kärnfysik(Swepub:uu)jacbi188 (author)
  • Ikegami Andersson, WalterUppsala universitet,Kärnfysik(Swepub:uu)walan603 (author)
  • Johansson, TordUppsala universitet,Kärnfysik(Swepub:uu)tordjoha (author)
  • Kupsc, AndrzejUppsala universitet,Kärnfysik(Swepub:uu)andrkups (author)
  • Pettersson, JoachimUppsala universitet,Kärnfysik(Swepub:uu)joape785 (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:Physical Review D: American Physical Society103:92470-00102470-0029

Internet link

Find in a library

To the university's database

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view