Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Vicent Mateu"'
Autor:
Alejandro Bris, Vicent Mateu
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-60 (2024)
Abstract Processes involving only massless or massive quarks at tree-level get corrections from massive (lighter, heavier, or equal-mass) secondary quarks starting at two-loop order, generated by a virtual gluon splitting into a massive quark anti-qu
Externí odkaz:
https://doaj.org/article/9e8558f517994391a963e22ca82fcf2a
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 12, Pp 1-73 (2023)
Abstract We generalize and update our former top quark mass calibration framework for Monte Carlo (MC) event generators based on the e + e − hadron-level 2-jettiness τ 2 distribution in the resonance region for boosted t t ¯ $$ t\overline{t} $$ p
Externí odkaz:
https://doaj.org/article/67520620537343d7b83b991141dfa932
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 2, Pp 1-42 (2023)
Abstract In this article we compute the cross section for the process e + e − → Q Q ¯ + X $$ {e}^{+}{e}^{-}\to Q\overline{Q}+X $$ , with Q a heavy quark, differential in a given event shape e and the angle θ T between the thrust axis and the be
Externí odkaz:
https://doaj.org/article/74a546fd556f4f2792f57080c4b8a08a
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-28 (2021)
Abstract We calculate the small-momentum expansion of vector, axial-vector, scalar, and pseudo-scalar heavy-quark current correlators in the large-β 0 limit of QCD, extending the analysis of Grozin and Sturm beyond the vector current. Our results ar
Externí odkaz:
https://doaj.org/article/aabef37bc6de455c810c9f6038f02caa
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 9, Pp 1-58 (2020)
Abstract In a recent paper we have shown how to optimally compute the differential and cumulative cross sections for massive event-shapes at O α s $$ \mathcal{O}\left({\alpha}_s\right) $$ in full QCD. In the present article we complete our study by
Externí odkaz:
https://doaj.org/article/96d50ff88a8b43b099316598763443a8
Autor:
Diogo Boito, Vicent Mateu
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 3, Pp 1-35 (2020)
Abstract We determine the strong coupling αs(m Z ) from dimensionless ratios of roots of moments of the charm- and bottom-quark vector and charm pseudo-scalar correlators, dubbed R q X , n ≡ M q X , n 1 n / M q X , n + 1 1 n + 1 , $$ {R}_q^{X,n}\e
Externí odkaz:
https://doaj.org/article/225db527d7334d8aab6607badd00550c
Autor:
Christopher Lepenik, Vicent Mateu
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 3, Pp 1-53 (2020)
Abstract We provide a general method to effectively compute differential and cumulative event-shape distributions to O(α s ) precision for massive quarks produced primarily at an e + e − collider. In particular, we show that at this order, due to
Externí odkaz:
https://doaj.org/article/fedbab16c5744b5ba3ee7c3ec3a9904b
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 4, Pp 1-23 (2019)
Abstract Along the years, the Cornell model has been extraordinarily successful in describing hadronic phenomenology, in particular in physical situations for which an effective theory of the strong interactions such as NRQCD cannot be applied. As a
Externí odkaz:
https://doaj.org/article/3e12ede7feee41fca08b0458c420128c
Autor:
Diogo Boito, Vicent Mateu
Publikováno v:
Physics Letters B, Vol 806, Iss , Pp 135482- (2020)
The strong coupling, αs, governs perturbative Quantum Chromodynamics (QCD) and is one of the free parameters of the Standard Model. We introduce a new method that allows a precise extraction of αs(mZ) from dimensionless ratios of roots of moments o
Externí odkaz:
https://doaj.org/article/c812258a9982458d8dc67dec60307fb6
Autor:
André H. Hoang, Ambar Jain, Christopher Lepenik, Vicent Mateu, Moritz Preisser, Ignazio Scimemi, Iain W. Stewart
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 4, Pp 1-58 (2018)
Abstract We provide a detailed description and analysis of a low-scale short-distance mass scheme, called the MSR mass, that is useful for high-precision top quark mass determinations, but can be applied for any heavy quark Q. In contrast to earlier
Externí odkaz:
https://doaj.org/article/a845a77947694f63887459255a26584e