Conference Paper/Proceeding/Abstract 535 views

### Searching for diquarks in hadrons

Philippe de Forcrand, Constantia Alexandrou, Biagio Lucini

Volume: "LAT2005", Start page: 053

Swansea University Author:

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 http://inspirehep.net/record/693104 https://cronfa.swan.ac.uk/Record/cronfa27937 No Tags, Be the first to tag this record!
first_indexed 2016-05-15T01:22:50Z 2018-02-09T05:11:31Z cronfa27937 SURis 2016-05-14T16:42:12.1814927v2279372016-05-14Searching for diquarks in hadrons7e6fcfe060e07a351090e2a8aba363cf0000-0001-8974-8266BiagioLuciniBiagio Lucinitruefalse2016-05-14SMASince 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"05330920052005-09-30http://inspirehep.net/record/693104COLLEGE NANMEMathematicsCOLLEGE CODESMASwansea University2016-05-14T16:42:12.18149272016-05-14T16:42:12.1814927Faculty of Science and EngineeringSchool of Biosciences, Geography and Physics - PhysicsPhilippede Forcrand1ConstantiaAlexandrou2BiagioLucini0000-0001-8974-82663 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 Searching for diquarks in hadrons Searching for diquarks in hadrons Biagio Lucini Searching for diquarks in hadrons Searching for diquarks in hadrons Searching for diquarks in hadrons Searching for diquarks in hadrons Searching for diquarks in hadrons 7e6fcfe060e07a351090e2a8aba363cf 7e6fcfe060e07a351090e2a8aba363cf_***_Biagio Lucini Biagio Lucini Philippe de Forcrand Constantia Alexandrou Biagio Lucini Conference Paper/Proceeding/Abstract "LAT2005" 053 2005 Swansea University Faculty of Science and Engineering facultyofscienceandengineering Faculty of Science and Engineering facultyofscienceandengineering Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics http://inspirehep.net/record/693104 0 0 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. 2005-09-30T03:33:33Z 1761395882306043904 10.937527