Investigation of heavy-heavy pseudoscalar mesons in thermal QCD sum rules
We investigate the mass and decay constant of the heavy-heavy pseudoscalar, Bc, ηc and ηb mesons in the framework of finite-temperature QCD sum rules. The annihilation and scattering parts of spectral density are calculated in the lowest order of perturbation theory. Taking into account the addition...
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| Veröffentlicht in: | Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2012-01, Vol.39 (1), p.015002-14 |
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| container_title | Journal of physics. G, Nuclear and particle physics |
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| creator | Veliev, E Veli Azizi, K Sundu, H Ak it, N |
| description | We investigate the mass and decay constant of the heavy-heavy pseudoscalar, Bc, ηc and ηb mesons in the framework of finite-temperature QCD sum rules. The annihilation and scattering parts of spectral density are calculated in the lowest order of perturbation theory. Taking into account the additional operators arising at finite temperature, the nonperturbative corrections are also evaluated. The masses and decay constants remain unchanged under T≅100 MeV, but after this point, they start to diminish with increasing temperature. At critical or deconfinement temperature, the decay constants reach approximately 35% of their values in vacuum, while the masses are decreased about 7%, 12% and 2% for Bc, ηc and ηb states, respectively. The results at zero temperature are in good consistency with the existing experimental values as well as predictions of the other nonperturbative approaches. |
| doi_str_mv | 10.1088/0954-3899/39/1/015002 |
| format | Article |
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The annihilation and scattering parts of spectral density are calculated in the lowest order of perturbation theory. Taking into account the additional operators arising at finite temperature, the nonperturbative corrections are also evaluated. The masses and decay constants remain unchanged under T≅100 MeV, but after this point, they start to diminish with increasing temperature. At critical or deconfinement temperature, the decay constants reach approximately 35% of their values in vacuum, while the masses are decreased about 7%, 12% and 2% for Bc, ηc and ηb states, respectively. The results at zero temperature are in good consistency with the existing experimental values as well as predictions of the other nonperturbative approaches.</description><identifier>ISSN: 0954-3899</identifier><identifier>EISSN: 1361-6471</identifier><identifier>DOI: 10.1088/0954-3899/39/1/015002</identifier><identifier>CODEN: JPGPED</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Consistency ; Constants ; Decay ; Density ; Exact sciences and technology ; heavy mesons ; Mathematical analysis ; Mesons ; Nuclear physics ; Physics ; Quantum chromodynamics ; Sum rules ; The physics of elementary particles and fields ; thermal QCD sum rules</subject><ispartof>Journal of physics. 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The results at zero temperature are in good consistency with the existing experimental values as well as predictions of the other nonperturbative approaches.</description><subject>Consistency</subject><subject>Constants</subject><subject>Decay</subject><subject>Density</subject><subject>Exact sciences and technology</subject><subject>heavy mesons</subject><subject>Mathematical analysis</subject><subject>Mesons</subject><subject>Nuclear physics</subject><subject>Physics</subject><subject>Quantum chromodynamics</subject><subject>Sum rules</subject><subject>The physics of elementary particles and fields</subject><subject>thermal QCD sum rules</subject><issn>0954-3899</issn><issn>1361-6471</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhoMouK7-BCEXwYO1kyb9yFHWr4UFEfQc0jR1u7RNTVph_72pXdaDwl4yh3neycyD0CWBWwJZFgKPWUAzzkPKQxICiQGiIzQjNCFBwlJyjGZ75hSdObcBgJhRNkPLZfulXV99yL4yLTYlXmv5tQ1-Xtw5PRTGKVlLixvtTOtw1eJ-rW0ja_y6uMduaLAdau3O0Ukpa6cvdnWO3h8f3hbPwerlabm4WwWKZbQPCsaiBDLG0lwmTCvFU17EJc9lHkvfyKJcZZrmeUpSSViq8oQBL6HQBAiNKZ2j62luZ83n4HcXTeWUrmvZajM4QVIK4I8mkUfjCVXWOGd1KTpbNdJuBQExqhOjFjFqEZQLIiZ1Pne1-0KOt5dWtqpy-3AU04R60HM3E1eZbt_9d6ToitLj8Bc_tAn5jWzMYFuv9kDmG-Hyl-w</recordid><startdate>20120101</startdate><enddate>20120101</enddate><creator>Veliev, E Veli</creator><creator>Azizi, K</creator><creator>Sundu, H</creator><creator>Ak it, N</creator><general>IOP Publishing</general><general>Institute of Physics</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20120101</creationdate><title>Investigation of heavy-heavy pseudoscalar mesons in thermal QCD sum rules</title><author>Veliev, E Veli ; Azizi, K ; Sundu, H ; Ak it, N</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c483t-d442608447ba64ecc979d5f9bab5a60882bc8e3bb717a147cb6409f0de1013533</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Consistency</topic><topic>Constants</topic><topic>Decay</topic><topic>Density</topic><topic>Exact sciences and technology</topic><topic>heavy mesons</topic><topic>Mathematical analysis</topic><topic>Mesons</topic><topic>Nuclear physics</topic><topic>Physics</topic><topic>Quantum chromodynamics</topic><topic>Sum rules</topic><topic>The physics of elementary particles and fields</topic><topic>thermal QCD sum rules</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Veliev, E Veli</creatorcontrib><creatorcontrib>Azizi, K</creatorcontrib><creatorcontrib>Sundu, H</creatorcontrib><creatorcontrib>Ak it, N</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of physics. 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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link; Alma/SFX Local Collection |
| subjects | Consistency Constants Decay Density Exact sciences and technology heavy mesons Mathematical analysis Mesons Nuclear physics Physics Quantum chromodynamics Sum rules The physics of elementary particles and fields thermal QCD sum rules |
| title | Investigation of heavy-heavy pseudoscalar mesons in thermal QCD sum rules |
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