First PiK atom lifetime and PiK scattering length measurements

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F14%3A00216678" target="_blank" >RIV/68407700:21340/14:00216678 - isvavai.cz</a>

Result on the web

<a href="http://arxiv.org/pdf/1403.0845.pdf" target="_blank" >http://arxiv.org/pdf/1403.0845.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

First PiK atom lifetime and PiK scattering length measurements

Original language description

The results of a search for hydrogen-like atoms consisting of Pi-/+K? mesons are presented. Evidence for PiK atom production by 24 GeV/c protons from CERN PS interacting with a nickel target has been seen in terms of characteristic ?K pairs from their breakup in the same target (178?49) and from Coulomb final state interaction (653?42). Using these results the analysis yields a first value for the ?K atom lifetime of ?=(2.5+3.0-1.8) fs and a first model-independent measurement of the S-wave isospin-odd?K scattering length ||a-0||=13||a1/2-a3/2||=(0.11+0.09-0.04)M-1? (aI for isospin I).

Czech name

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Czech description

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Type

V_souhrn - Summary research report

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

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2014

Confidentiality

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

Number of pages

14

Place of publication

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Publisher/client name

Evropská organizace pro jaderný výzkum

Version

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