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η'-nucleus optical potential and possible η' bound states

Identificadores del recurso

0370-2693

http://hdl.handle.net/2445/44086

607051

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(Dipòsit Digital de la Universitat de Barcelona)

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Title:: η'-nucleus optical potential and possible η' bound states
Tema:: Física nuclear; Hadrons; Mesons (Física nuclear); Constitució de la matèria; Nuclear physics; Mesons (Nuclear physics); Constitution of matter
Description:: Starting from a recent model of the η′N interaction, we evaluate the η ′-nucleus optical potential, including the contribution of lowest order in density, tρ/2mη′, together with the second-order terms accounting for η′ absorption by two nucleons. We also calculate the formation cross section of the η′bound states from (π, p) reactions on nuclei. The η′-nucleus potential suffers from uncertainties tied to the poorly known η′N interaction, which can be partially constrained by the experimental modulus of the η′N scattering length and/or the recently measured transparency ratios in η′nuclear photoproduction. Assuming an attractive interaction and taking the claimed experimental value |aη′N|= 0.1 fm, we obtain an η′optical potential in nuclear matter at saturation density of Vη′=−(8.7 + 1.8i) MeV, not attractive enough to produce η′bound states in light nuclei. Larger values of the scattering length give rise to deeper optical potentials, with moderate enough imaginary parts. For a value |aη′N|= 0.3 fm, which can still be considered to lie within the uncertainties of the experimental constraints, the spectra of light and medium nuclei show clear structures associated to η′-nuclear bound states and to threshold enhancements in the unbound region.
Source:: Articles publicats en revistes (Física Quàntica i Astrofísica)
Idioma:: English
Relation:: info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2012.01.061; Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.physletb.2012.01.061; Physics Letters B, 2012, vol. 709, num. 1-2, p. 87-92; http://dx.doi.org/10.1016/j.physletb.2012.01.061; info:eu-repo/grantAgreement/EC/FP7/227431/EU//HADRONPHYSICS2
Autor/Productor:: Nagahiro, H.; Hirenzaki, S.; Oset Baguena, Eulogio; Ramos Gómez, Àngels
Publisher:: Elsevier B.V.
Rights:: (c) Elsevier B.V., 2012; info:eu-repo/semantics/openAccess
Date:: 2013-06-06T10:50:15Z; 2012
Tipo de recurso:: info:eu-repo/semantics/article; info:eu-repo/semantics/acceptedVersion
Format:: 11 p.; application/pdf

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3. <dc:creator>Hirenzaki, S.</dc:creator>
4. <dc:creator>Oset Baguena, Eulogio</dc:creator>
5. <dc:creator>Ramos Gómez, Àngels</dc:creator>
6. <dc:subject>Física nuclear</dc:subject>
7. <dc:subject>Hadrons</dc:subject>
8. <dc:subject>Mesons (Física nuclear)</dc:subject>
9. <dc:subject>Constitució de la matèria</dc:subject>
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1. <dc:title>η'-nucleus optical potential and possible η' bound states</dc:title>
2. <dc:creator>Nagahiro, H.</dc:creator>
3. <dc:creator>Hirenzaki, S.</dc:creator>
4. <dc:creator>Oset Baguena, Eulogio</dc:creator>
5. <dc:creator>Ramos Gómez, Àngels</dc:creator>
6. <dc:subject.classification>Física nuclear</dc:subject.classification>
7. <dc:subject.classification>Hadrons</dc:subject.classification>
8. <dc:subject.classification>Mesons (Física nuclear)</dc:subject.classification>
9. <dc:subject.classification>Constitució de la matèria</dc:subject.classification>
10. <dc:subject.other>Nuclear physics</dc:subject.other>
11. <dc:subject.other>Hadrons</dc:subject.other>
12. <dc:subject.other>Mesons (Nuclear physics)</dc:subject.other>
13. <dc:subject.other>Constitution of matter</dc:subject.other>
14. <dcterms:abstract>Starting from a recent model of the η′N interaction, we evaluate the η ′-nucleus optical potential, including the contribution of lowest order in density, tρ/2mη′, together with the second-order terms accounting for η′ absorption by two nucleons. We also calculate the formation cross section of the η′bound states from (π, p) reactions on nuclei. The η′-nucleus potential suffers from uncertainties tied to the poorly known η′N interaction, which can be partially constrained by the experimental modulus of the η′N scattering length and/or the recently measured transparency ratios in η′nuclear photoproduction. Assuming an attractive interaction and taking the claimed experimental value |aη′N|= 0.1 fm, we obtain an η′optical potential in nuclear matter at saturation density of Vη′=−(8.7 + 1.8i) MeV, not attractive enough to produce η′bound states in light nuclei. Larger values of the scattering length give rise to deeper optical potentials, with moderate enough imaginary parts. For a value |aη′N|= 0.3 fm, which can still be considered to lie within the uncertainties of the experimental constraints, the spectra of light and medium nuclei show clear structures associated to η′-nuclear bound states and to threshold enhancements in the unbound region.</dcterms:abstract>
15. <dcterms:dateAccepted>2013-06-06T10:50:15Z</dcterms:dateAccepted>
16. <dcterms:available>2013-06-06T10:50:15Z</dcterms:available>
17. <dcterms:created>2013-06-06T10:50:15Z</dcterms:created>
18. <dcterms:issued>2012</dcterms:issued>
19. <dc:type>info:eu-repo/semantics/article</dc:type>
20. <dc:type>info:eu-repo/semantics/acceptedVersion</dc:type>
21. <dc:identifier>0370-2693</dc:identifier>
22. <dc:identifier>http://hdl.handle.net/2445/44086</dc:identifier>
23. <dc:identifier>607051</dc:identifier>
24. <dc:identifier.issn>0370-2693</dc:identifier.issn>
25. <dc:language>eng</dc:language>
26. <dc:relation>Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.physletb.2012.01.061</dc:relation>
27. <dc:relation>Physics Letters B, 2012, vol. 709, num. 1-2, p. 87-92</dc:relation>
28. <dc:relation>http://dx.doi.org/10.1016/j.physletb.2012.01.061</dc:relation>
29. <dc:relation>info:eu-repo/grantAgreement/EC/FP7/227431/EU//HADRONPHYSICS2</dc:relation>
30. <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2012.01.061</dc:relation>
31. <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
32. <dc:rights>(c) Elsevier B.V., 2012</dc:rights>
33. <dc:publisher>Elsevier B.V.</dc:publisher>
34. <dc:source>Articles publicats en revistes (Física Quàntica i Astrofísica)</dc:source>
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  1. <dc:title>η'-nucleus optical potential and possible η' bound states</dc:title>
  2. <dc:creator>Nagahiro, H.</dc:creator>
  3. <dc:creator>Hirenzaki, S.</dc:creator>
  4. <dc:creator>Oset Baguena, Eulogio</dc:creator>
  5. <dc:creator>Ramos Gómez, Àngels</dc:creator>
  6. <dc:description>Starting from a recent model of the η′N interaction, we evaluate the η ′-nucleus optical potential, including the contribution of lowest order in density, tρ/2mη′, together with the second-order terms accounting for η′ absorption by two nucleons. We also calculate the formation cross section of the η′bound states from (π, p) reactions on nuclei. The η′-nucleus potential suffers from uncertainties tied to the poorly known η′N interaction, which can be partially constrained by the experimental modulus of the η′N scattering length and/or the recently measured transparency ratios in η′nuclear photoproduction. Assuming an attractive interaction and taking the claimed experimental value |aη′N|= 0.1 fm, we obtain an η′optical potential in nuclear matter at saturation density of Vη′=−(8.7 + 1.8i) MeV, not attractive enough to produce η′bound states in light nuclei. Larger values of the scattering length give rise to deeper optical potentials, with moderate enough imaginary parts. For a value |aη′N|= 0.3 fm, which can still be considered to lie within the uncertainties of the experimental constraints, the spectra of light and medium nuclei show clear structures associated to η′-nuclear bound states and to threshold enhancements in the unbound region.</dc:description>
  7. <dc:date>2013-06-06T10:50:15Z</dc:date>
  8. <dc:date>2013-06-06T10:50:15Z</dc:date>
  9. <dc:date>2012</dc:date>
  10. <dc:date>2013-06-06T10:50:15Z</dc:date>
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  13. <dc:identifier>0370-2693</dc:identifier>
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  15. <dc:identifier>607051</dc:identifier>
  16. <dc:language>eng</dc:language>
  17. <dc:relation>Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.physletb.2012.01.061</dc:relation>
  18. <dc:relation>Physics Letters B, 2012, vol. 709, num. 1-2, p. 87-92</dc:relation>
  19. <dc:relation>http://dx.doi.org/10.1016/j.physletb.2012.01.061</dc:relation>
  20. <dc:relation>info:eu-repo/grantAgreement/EC/FP7/227431/EU//HADRONPHYSICS2</dc:relation>
  21. <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2012.01.061</dc:relation>
  22. <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  23. <dc:rights>(c) Elsevier B.V., 2012</dc:rights>
  24. <dc:publisher>Elsevier B.V.</dc:publisher>
  25. <dc:source>Articles publicats en revistes (Física Quàntica i Astrofísica)</dc:source>
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