Measurement of np->npπ0π0 reaction in search for the recently observed d*(2380) resonance

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Measurement of np->npπ0π0 reaction in search for the recently observed d*(2380) resonance	725 KB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1016/j.physletb.2015.02.067

Title: Measurement of np->npπ0π0 reaction in search for the recently observed d*(2380) resonance
Creator: Adlarson, P.
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Bardan, W.
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Skorodko, T.
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Augustyniak, W.
Contributor: Томский государственный университет Физический факультет Научные подразделения ФФ
Date: 2015
DOI: 10.1016/j.physletb.2015.02.067
Description: Exclusive measurements of the quasi-free np →npπ0π0reaction have been performed by means of dpcollisions at Td=2.27GeVusing the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region √s=(2.35–2.46)GeV, which includes the region of the ABC effect and its associated d∗(2380)resonance. Adding the d∗resonance amplitude to that for the conventional processes leads to a reasonable description of the data. The observed resonance effect in the total cross section is in agreement with the predictions of Fäldt and Wilkin as well with those of Albadajedo and Oset. The ABC effect, i.e.the low-mass enhancement in the π0π0-invariant mass spectrum, is found to be very modest – if present at all, which might pose a problem to some of its interpretations.

Created: 22-04-2016

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Физический факультет Measurement of np->npπ0π0 reaction in search for the recently observed d*(2380) resonance