Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/201615 |
Resumo: | This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in pp collisions at √s=13TeV and p-Pb collisions at √sNN=5.02 TeV, combined with previously published results from pp collisions at √s=7 TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length f0-¹ and the effective range d0, is constrained by comparing the measured Λ–Λ correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice computations, both predicting a shallow attractive interaction, and permit to test different theoretical approaches describing the Λ–Λ interaction. The region in the (f0-¹, d0) plane which would accommodate a Λ–Λ bound state is substantially restricted compared to previous studies. The binding energy of the possible Λ–Λ bound state is estimated within an effective-range expansion approach and is found to be BΛΛ=3.2+1.6−2.4(stat)+1.8−1.0(syst)MeV. |
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Acharya, ShreyasiGay Ducati, Maria BeatrizPereira, Luis GustavoPezzi, Rafael PerettiALICE Collaboration2019-11-13T03:50:36Z20190370-2693http://hdl.handle.net/10183/201615001105136This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in pp collisions at √s=13TeV and p-Pb collisions at √sNN=5.02 TeV, combined with previously published results from pp collisions at √s=7 TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length f0-¹ and the effective range d0, is constrained by comparing the measured Λ–Λ correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice computations, both predicting a shallow attractive interaction, and permit to test different theoretical approaches describing the Λ–Λ interaction. The region in the (f0-¹, d0) plane which would accommodate a Λ–Λ bound state is substantially restricted compared to previous studies. The binding energy of the possible Λ–Λ bound state is estimated within an effective-range expansion approach and is found to be BΛΛ=3.2+1.6−2.4(stat)+1.8−1.0(syst)MeV.application/pdfengPhysics letters. B. Amsterdam. Vol. 797 (Oct. 2019), 134822, p. 1-13Aceleradores de partículasColisao de ions pesadosStudy of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHCEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001105136.pdf.txt001105136.pdf.txtExtracted Texttext/plain80270http://www.lume.ufrgs.br/bitstream/10183/201615/2/001105136.pdf.txtb81dc0fad098d6a0aad31a8882f1083dMD52ORIGINAL001105136.pdfTexto completo (inglês)application/pdf1216758http://www.lume.ufrgs.br/bitstream/10183/201615/1/001105136.pdf585e34748ca2f061da3c1c2e40deb3f5MD5110183/2016152023-11-18 04:24:36.025695oai:www.lume.ufrgs.br:10183/201615Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-11-18T06:24:36Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC |
title |
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC |
spellingShingle |
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC Acharya, Shreyasi Aceleradores de partículas Colisao de ions pesados |
title_short |
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC |
title_full |
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC |
title_fullStr |
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC |
title_full_unstemmed |
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC |
title_sort |
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC |
author |
Acharya, Shreyasi |
author_facet |
Acharya, Shreyasi Gay Ducati, Maria Beatriz Pereira, Luis Gustavo Pezzi, Rafael Peretti ALICE Collaboration |
author_role |
author |
author2 |
Gay Ducati, Maria Beatriz Pereira, Luis Gustavo Pezzi, Rafael Peretti ALICE Collaboration |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Acharya, Shreyasi Gay Ducati, Maria Beatriz Pereira, Luis Gustavo Pezzi, Rafael Peretti ALICE Collaboration |
dc.subject.por.fl_str_mv |
Aceleradores de partículas Colisao de ions pesados |
topic |
Aceleradores de partículas Colisao de ions pesados |
description |
This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in pp collisions at √s=13TeV and p-Pb collisions at √sNN=5.02 TeV, combined with previously published results from pp collisions at √s=7 TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length f0-¹ and the effective range d0, is constrained by comparing the measured Λ–Λ correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice computations, both predicting a shallow attractive interaction, and permit to test different theoretical approaches describing the Λ–Λ interaction. The region in the (f0-¹, d0) plane which would accommodate a Λ–Λ bound state is substantially restricted compared to previous studies. The binding energy of the possible Λ–Λ bound state is estimated within an effective-range expansion approach and is found to be BΛΛ=3.2+1.6−2.4(stat)+1.8−1.0(syst)MeV. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-11-13T03:50:36Z |
dc.date.issued.fl_str_mv |
2019 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/201615 |
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0370-2693 |
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001105136 |
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0370-2693 001105136 |
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http://hdl.handle.net/10183/201615 |
dc.language.iso.fl_str_mv |
eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physics letters. B. Amsterdam. Vol. 797 (Oct. 2019), 134822, p. 1-13 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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