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Conference Paper/Proceeding/Abstract 22497 views

Searching for diquarks in hadrons

Philippe de Forcrand, Constantia Alexandrou, Biagio Lucini Orcid Logo

Volume: "LAT2005", Start page: 053

Swansea University Author: Biagio Lucini Orcid Logo

Abstract

Since the early days of QCD, it has been argued that inside hadrons quarks organise into substructures. Among those, popular pictures of various phenomena (including exotica and colour superconductivity) give a prominent role to diquarks, i.e. to colour antitriplet combinations of two quarks. Using...

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Published: 2005
Online Access: http://inspirehep.net/record/693104
URI: https://cronfa.swan.ac.uk/Record/cronfa27937
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spelling 2016-05-14T16:42:12.1814927 v2 27937 2016-05-14 Searching for diquarks in hadrons 7e6fcfe060e07a351090e2a8aba363cf 0000-0001-8974-8266 Biagio Lucini Biagio Lucini true false 2016-05-14 SMA Since the early days of QCD, it has been argued that inside hadrons quarks organise into substructures. Among those, popular pictures of various phenomena (including exotica and colour superconductivity) give a prominent role to diquarks, i.e. to colour antitriplet combinations of two quarks. Using a gauge-invariant setup, which combines the diquark with a static quark, we study spatial correlations of the two light quarks inside the diquark. After illustrating the setup, we discuss our first results for both the scalar (``good'') and the spin one (``bad'') diquark channels. In a regime in which $m_{\pi} \simeq 830$ MeV, our data show unambiguously that a scalar diquark forms with a size of $\simeq$ 0.9 fm. For the vector diquark we are able to put a lower bound of 4.1(7) fm on its size. We also investigate the mass splitting between the good and the bad diquark: our findings are compatible with phenomenologically inspired predictions for this quantity. Conference Paper/Proceeding/Abstract "LAT2005" 053 30 9 2005 2005-09-30 http://inspirehep.net/record/693104 COLLEGE NANME Mathematics COLLEGE CODE SMA Swansea University 2016-05-14T16:42:12.1814927 2016-05-14T16:42:12.1814927 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Philippe de Forcrand 1 Constantia Alexandrou 2 Biagio Lucini 0000-0001-8974-8266 3
title Searching for diquarks in hadrons
spellingShingle Searching for diquarks in hadrons
Biagio Lucini
title_short Searching for diquarks in hadrons
title_full Searching for diquarks in hadrons
title_fullStr Searching for diquarks in hadrons
title_full_unstemmed Searching for diquarks in hadrons
title_sort Searching for diquarks in hadrons
author_id_str_mv 7e6fcfe060e07a351090e2a8aba363cf
author_id_fullname_str_mv 7e6fcfe060e07a351090e2a8aba363cf_***_Biagio Lucini
author Biagio Lucini
author2 Philippe de Forcrand
Constantia Alexandrou
Biagio Lucini
format Conference Paper/Proceeding/Abstract
container_volume "LAT2005"
container_start_page 053
publishDate 2005
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://inspirehep.net/record/693104
document_store_str 0
active_str 0
description Since the early days of QCD, it has been argued that inside hadrons quarks organise into substructures. Among those, popular pictures of various phenomena (including exotica and colour superconductivity) give a prominent role to diquarks, i.e. to colour antitriplet combinations of two quarks. Using a gauge-invariant setup, which combines the diquark with a static quark, we study spatial correlations of the two light quarks inside the diquark. After illustrating the setup, we discuss our first results for both the scalar (``good'') and the spin one (``bad'') diquark channels. In a regime in which $m_{\pi} \simeq 830$ MeV, our data show unambiguously that a scalar diquark forms with a size of $\simeq$ 0.9 fm. For the vector diquark we are able to put a lower bound of 4.1(7) fm on its size. We also investigate the mass splitting between the good and the bad diquark: our findings are compatible with phenomenologically inspired predictions for this quantity.
published_date 2005-09-30T03:33:56Z
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score 11.035634

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