SCOAP3 Repository 7 records found  Search took 0.02 seconds. 
1. Tetraquark-adequate formulation of QCD sum rules / Lucha, Wolfgang ; Melikhov, Dmitri ; Sazdjian, Hagop
We study details of QCD sum rules à la Shifman-Vainshtein-Zakharov for exotic tetraquark states. [...]
Published in Physical Review D 100 (2019) 10.1103/PhysRevD.100.014010
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2. Are there narrow flavor-exotic tetraquarks in large-Nc QCD? / Lucha, Wolfgang ; Melikhov, Dmitri ; Sazdjian, Hagop
A salient feature shared by all tetraquark candidates observed in experiment is the absence of flavor-exotic states of the type a¯bc¯d, with four different quark flavors. [...]
Published in Physical Review D 98 (2018) 10.1103/PhysRevD.98.094011 arXiv:1810.09986
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3. Erratum to: Local-duality QCD sum rules for strong isospin breaking in the decay constants of heavy–light mesons / Lucha, Wolfgang ; Melikhov, Dmitri ; Simula, Silvano
We correct Eq. (1) of the original paper, where the term..
Published in EPJC 78 (2018) 936 10.1140/epjc/s10052-018-6419-3
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4. Local-duality QCD sum rules for strong isospin breaking in the decay constants of heavy–light mesons / Lucha, Wolfgang ; Melikhov, Dmitri ; Simula, Silvano
We discuss the leptonic decay constants of heavy–light mesons by means of Borel QCD sum rules in the local-duality (LD) limit of infinitely large Borel mass parameter. [...]
Published in EPJC 78 (2018) 168 10.1140/epjc/s10052-018-5637-z
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5. Tetraquark and two-meson states at large Nc / Lucha, Wolfgang ; Melikhov, Dmitri ; Sazdjian, Hagop
Considering four-point correlation functions of color-singlet quark bilinears, we investigate, in the large- Nc limit of QCD, the subleading diagrams that involve, in the s -channel of meson–meson scattering amplitudes, two-quark–two-antiquark intermediate states. [...]
Published in EPJC 77 (2017) 866 10.1140/epjc/s10052-017-5437-x
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6. Isospin breaking in the decay constants of heavy mesons from QCD sum rules / Lucha, Wolfgang ; Melikhov, Dmitri ; Simula, Silvano
We present a study of the strong isospin-breaking (IB) effect, due in QCD to the difference between u - and d -quark masses, in the leptonic decay constants of charmed and beauty pseudoscalar and vector mesons using the method of QCD sum rules. [...]
Published in Physics letters B (2016) 10.1016/j.physletb.2016.12.041
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7. Decay constants of the charmed vector mesons D⁎ and Ds⁎ from QCD sum rules / Lucha, Wolfgang ; Melikhov, Dmitri ; Simula, Silvano
We present a sum-rule calculation of the decay constants of the charmed vector mesons D⁎ and Ds⁎ from the two-point correlator of vector currents. [...]
Published in Physics letters B 735 (2014) 12-18 10.1016/j.physletb.2014.06.007
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