Zobrazeno 1 - 10
of 204
pro vyhledávání: '"Harnett, D."'
Finite-temperature quantum field theory provides the foundation for many important phenomena in the Standard Model and extensions, including phase transitions, baryogenesis, and gravitational waves. Methods are developed to enable application of pySe
Externí odkaz:
http://arxiv.org/abs/2401.05258
QCD Laplace sum-rules are used to examine the constituent mass spectrum of $J^P\in\{0^+,1^+\}$ heavy-light [Qq] diquarks with $Q\in\{c,b\}$ and $q\in\{u,d,s\}$. As in previous sum-rule studies, the negative parity $J^P\in\{0^-, 1^-\}$ [Qq] diquark ma
Externí odkaz:
http://arxiv.org/abs/2307.15815
We calculated next-to-leading-order (NLO) QCD perturbative contributions to a $J^{PC}=0^{+-}$, $d u\bar d\bar u$ tetraquark (diquark-antidiquark) correlator in the chiral limit of massless $u$ and $d$ quarks. At NLO, there are four quark self-energy
Externí odkaz:
http://arxiv.org/abs/2211.00155
In QCD sum-rule methods, the fundamental field-theoretical quantities are correlation functions of composite operators that serve as hadronic interpolating fields. One of the challenges of loop corrections to QCD correlation functions in conventional
Externí odkaz:
http://arxiv.org/abs/2208.12363
Publikováno v:
Phys. Rev. D 103, 114005 (2021)
Correlations between the strange quark mass, strange quark condensate $\langle \bar s s\rangle$, and the kaon partially conserved axial current (PCAC) relation are developed. The key dimensionless and renormalization-group invariant quantities in the
Externí odkaz:
http://arxiv.org/abs/2104.00752
We study mixing between conventional and hybrid mesons in vector and axial vector charmonium using QCD Laplace sum-rules. We compute meson-hybrid cross correlators within the operator product expansion, taking into account condensate contributions up
Externí odkaz:
http://arxiv.org/abs/1906.09504
Publikováno v:
Phys. Rev. D 100, 074025 (2019)
Constituent mass predictions for axial vector (i.e., $J^P=1^+$) $cc$ and $bb$ colour antitriplet diquarks are generated using QCD Laplace sum-rules. We calculate the diquark correlator within the operator product expansion to NLO, including terms pro
Externí odkaz:
http://arxiv.org/abs/1905.12803
Publikováno v:
Phys. Rev. D 100, 034012 (2019)
QCD Gaussian sum-rules are used to explore the vector ($J^{PC}=1^{--}$) strangeonium hybrid interpretation of the $Y(2175)$. Using a two-resonance model consisting of the $Y(2175)$ and an additional resonance, we find that the relative resonance stre
Externí odkaz:
http://arxiv.org/abs/1905.12779
Publikováno v:
Phys. Rev. D 98, 096020 (2018)
We extend previous calculations of leading-order correlation functions of spin-0 and spin-1 light quarkonium hybrids to include QCD condensates of dimensions five and six, with a view to improving the stability of QCD sum-rules analyses in previously
Externí odkaz:
http://arxiv.org/abs/1806.02465
Autor:
Esau, S., Harnett, D.
Publikováno v:
Eur. Phys. J. A (2019) 55: 31
pySecDec is a program that numerically calculates dimensionally regularized integrals. We use pySecDec to compute QCD Laplace sum-rules for pseudoscalar (i.e., $J^{PC}=0^{-+}$) charmonium hybrids, and compare the results to sum-rules computed using a
Externí odkaz:
http://arxiv.org/abs/1806.00157