Evidence for pi K-atoms with DIRAC

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F09%3A00327367" target="_blank" >RIV/61389005:_____/09:00327367 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21340/09:00163645 RIV/68378271:_____/09:00342362

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Evidence for pi K-atoms with DIRAC

Original language description

We present evidence for the first observation of electromagnetically bound pi K-+/-(-/+)-pairs (pi K-atoms) with the DIRAC experiment at the CERN-PS. The pi K-atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the pi(+/-) and K--/+-mesons from the atom dissociation are analyzed in a two-arm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173 +/- 54 pi K-atoms. The mean life of pi K-atoms is related to the s-wave pi K-scattering lengths, the measurement of which is the goal of the experiment. From these first data we derive a lower limit for the mean life of 0.8 fs at 90% confidence level.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BG - Nuclear, atomic and molecular physics, accelerators

OECD FORD branch

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Project

<a href="/en/project/LA08015" target="_blank" >LA08015: Collaboration of the Czech Republic with CERN</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics Letters. B

ISSN

0370-2693

e-ISSN

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Volume of the periodical

674

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

6

Pages from-to

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UT code for WoS article

000265254000003

EID of the result in the Scopus database

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