Výsledky vyhledávání - "Mark A. Samuel"

Akademický článek

Promoting evidence based medicine in preclinical medical students via a federated literature search tool.

Autor: Mark Keim, Samuel¹ (AUTHOR) sam@aemrc.arizona.edu, Howse, David¹ (AUTHOR), Bracke, Paul² (AUTHOR), Mendoza, Kathryn¹ (AUTHOR)

Publikováno v: Medical Teacher. Nov2008, Vol. 30 Issue 9/10, p880-884. 5p. 1 Black and White Photograph, 3 Charts.

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A prediction for the 4-loop β function in QCD

Autor: John Ellis, Mark A. Samuel, Marek Karliner

Publikováno v: Physics Letters B. 400:176-181

We predict that the four-loop contribution β3 to the QCD β function in the MS prescription is given by β 3 ⋍ 23600(900) − 6400(200)N f + 350(70)N f 2 + 1.5N f 3 , where Nf is the number of flavours and the coefficient of Nf3 is an exact result

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33e18998afa57daefb923bfc62ac2194
https://doi.org/10.1016/s0370-2693(97)00342-0

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Radiative transfer single-scattering albedo estimation with a super-padé approximation of Chandrasekhar'sH-function

Autor: Mark A. Samuel, N. J. McCormick, Eric Steinfelds, Jim Reid

Publikováno v: International Journal of Theoretical Physics. 36:997-1007

Three algorithms for evaluating the single-scattering albedo within an isotropically scattering, semi-infinite medium are developed for measurements external to the medium with narrow and wide field-of-view detectors. Two of the algorithms are iterat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c38796873b54eb62736c6c456463339
https://doi.org/10.1007/bf02435797

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and as tests of the standard model and the mass of the Higgs boson

Autor: Mark A. Samuel

Publikováno v: Physics Letters B. 397:241-244

We consider the decays Z → b b and Z → c c as tests of the Standard Model (SM). We find that Rb = 0.2145 and Rc = 0.1719. Comparing with recent experimental measurements, we find that Rb[suexp is too high by only (1.4σ) and Rcexp is too low by o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fe8428abd8731b3695fd1bffc34602a6
https://doi.org/10.1016/s0370-2693(97)00099-3

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Z → bb̄ and Z → cc̄ as tests of the standard model and the mass of the Higgs Boson

Autor: Mark A. Samuel

Publikováno v: Nuclear Physics B - Proceedings Supplements. 55:184-187

We consider the decays Z → bb and Z → cc as tests of the Standard Model (SM). We find that R b = 0.2145 and R c = 0.1719. Comparing with recent experimental measurements, we find that R b exp is too high by only (1.4 σ) and R c exp is too low by

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6b36bb745c310f45f595adc9140cc775
https://doi.org/10.1016/s0920-5632(97)00172-2

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The strong coupling constant, αs, from W + jet processes: An analysis using Padé approximants

Autor: Tesfaye Abraha, Mark A. Samuel, Jinhong Yu

Publikováno v: Physics Letters B. 394:165-169

The recent results for R = σ W+1jet σ W+0jets obtained by the DO Collaboration at Fermilab are reanalyzed. We use Pade Approximants (PA) to estimate the higher-order QCD corrections, which we find are on the order of 4%. We observed that using PA,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::06e803f6093e1635a03025745249ace8
https://doi.org/10.1016/s0370-2693(96)01673-5

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$$Z \to b\bar b$$ and $$Z \to c\bar c$$ as tests of the Standard Modelas tests of the Standard Model

Autor: Mark A. Samuel

Publikováno v: International Journal of Theoretical Physics. 36:119-123

We consider the decays$Z \to b\bar b$ and$Z \to c\bar c$ as tests of the Standard Model (SM). We find thatRb=0.2141 andRc=0.1719. Comparing with recent experimental measurements, we find thatRbexp is too high by 3.9σ andRcexp is too low by 2.4σ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bbe777f1dd62b982b42d2cdac716c494
https://doi.org/10.1007/bf02435775

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Renormalization-scheme dependence of Padé summation in QCD

Autor: Mark A. Samuel, Marek Karliner, John Ellis, Einan Gardi

Publikováno v: Physical Review D. 54:6986-6996

We study the renormalization-scheme (RS) dependence of Pade Approximants (PA's), and compare them with the Principle of Minimal Sensitivity (PMS) and the Effective Charge (ECH) approaches. Although the formulae provided by the PA, PMS and ECH predict

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::891d43f286637ffe454dba6c1832f96f
https://doi.org/10.1103/physrevd.54.6986

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¦ΔI¦=1/2 Rule in the standard model

Autor: Mark A. Samuel

Publikováno v: International Journal of Theoretical Physics. 35:1389-1392

We consider theK → ππ amplitudes in the Standard Model. We show that the infamous ¦ΔI} = 1/2 rule can be explained by using Pade approximants to sum the diverging QCD perturbation series.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b26118daf237cc83b8250d9e30fd248
https://doi.org/10.1007/bf02084948

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Padé approximants, Borel transforms and renormalons: the Bjorken sum rule as a case study

Autor: Einan Gardi, John Ellis, Mark A. Samuel, Marek Karliner

Publikováno v: Physics Letters B. 366:268-275

We prove that Pade approximants yield increasingly accurate predictions of higher-order coefficients in QCD perturbation series whose high-order behaviour is governed by a renormalon. We also prove that this convergence is accelerated if the perturba

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65b81c07110621511e273f7fb174827f
https://doi.org/10.1016/0370-2693(95)01326-1

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