First πK atom lifetime and πK scattering length measurements

Amsler, Claude; Schacher, Jürg (2014). First πK atom lifetime and πK scattering length measurements. Physics letters. B, 735, pp. 288-294. Elsevier 10.1016/j.physletb.2014.06.043

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The results of a search for hydrogen-like atoms consisting of π∓K±π∓K± mesons are presented. Evidence for πK atom production by 24 GeV/c protons from CERN PS interacting with a nickel target has been seen in terms of characteristic πK pairs from their breakup in the same target (178±49178±49) as well as in terms of produced πK atoms (653±42653±42). Using these results, the analysis yields a first value for the πK atom lifetime of View the MathML sourceτ=(2.5−1.8+3.0) fs and a first measurement of the S-wave isospin-odd πK scattering length View the MathML source|a0−|=13|a1/2−a3/2|=(0.11−0.04+0.09)Mπ−1 (aIaI for isospin I).

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Amsler, Claude and Schacher, Jürg

Subjects:

500 Science > 530 Physics

ISSN:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

Jan Dirk Brinksma

Date Deposited:

10 Jun 2015 11:08

Last Modified:

26 Jun 2016 02:02

Publisher DOI:

10.1016/j.physletb.2014.06.043

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.

BORIS DOI:

10.7892/boris.68651

URI:

https://boris.unibe.ch/id/eprint/68651

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