The Experts below are selected from a list of 300843 Experts worldwide ranked by ideXlab platform
Iain W. Stewart - One of the best experts on this subject based on the ideXlab platform.
-
$C$-Parameter Distribution at N$^3$LL′ including power corrections
Physical Review D, 2015Co-Authors: Andre H. Hoang, Daniel W. Kolodrubetz, Vicent Mateu, Iain W. StewartAbstract:We compute the e[superscript +]e[superscript -] C-Parameter Distribution using the soft-collinear effective theory with a resummation to next-to-next-to-next-to-leading-log prime accuracy of the most singular partonic terms. This includes the known fixed-order QCD results up to O(α[3 over s]), a numerical determination of the two-loop nonlogarithmic term of the soft function, and all logarithmic terms in the jet and soft functions up to three loops. Our result holds for C in the peak, tail, and far tail regions. Additionally, we treat hadronization effects using a field theoretic nonperturbative soft function, with moments Ω[subscript n]. To eliminate an O(Λ[subscript QCD]) renormalon ambiguity in the soft function, we switch from the [bar over MS] to a short distance “Rgap” scheme to define the leading power correction Parameter Ω[subscript 1]. We show how to simultaneously account for running effects in Ω[subscript 1] due to renormalon subtractions and hadron-mass effects, enabling power correction universality between C-Parameter and thrust to be tested in our setup. We discuss in detail the impact of resummation and renormalon subtractions on the convergence. In the relevant fit region for α[subscript s](m[subscript Z]) and Ω[subscript 1], the perturbative uncertainty in our cross section is ≃ 2.5% at Q = m[subscript Z].United States. Dept. of Energy. Office of Nuclear Physics (Contract DE-SC0011090)European Community. Marie-Curie Research Networks (Contract PITN-GA-2010-264564 (LHCphenOnet))Simons Foundation (Investigator Grant 327942
-
Precise determination of $\alpha_s$ from the $C$-Parameter Distribution
Physical Review D, 2015Co-Authors: Andre H. Hoang, Daniel W. Kolodrubetz, Vicent Mateu, Iain W. StewartAbstract:nal states coming from the underlying partons created in the collisions appear as boosted and collimated groups of hadrons known as jets. Event shapes have proven to be very successful to study these collisions quantitatively. They combine the energy and momenta of all of the measured hadrons into an infraredand collinear-safe Parameter which describes the geometric properties of the whole event by a single variable Distribution. Due to their global nature event shapes have nice theoretical properties, making it possible to obtain very accurate theoretical predictions using QCD. Most e + e event shape variables quantify how well the event resembles the situation of two narrow back-to-back jets, called dijets, by vanishing in this limit. Because the dijet limit involves restrictions that only allow collinear and soft degrees of freedom for the nal-state radiation, such
-
c Parameter Distribution at n 3 ll including power corrections
Physical Review D, 2015Co-Authors: Andre H. Hoang, Daniel W. Kolodrubetz, Vicent Mateu, Iain W. StewartAbstract:the leading power correction Parameter 1. We show how to simultaneously account for running eects in 1 due to renormalon subtractions and hadron-mass eects, enabling power correction universality between C-Parameter and thrust to be tested in our setup. We discuss in detail the impact of resummation and renormalon subtractions on the convergence. In the relevant t region for
-
precise determination of α s from the c Parameter Distribution
Physical Review D, 2015Co-Authors: Andre H. Hoang, Daniel W. Kolodrubetz, Vicent Mateu, Iain W. StewartAbstract:We present a global fit for ${\ensuremath{\alpha}}_{s}({m}_{Z})$, analyzing the available $C$-Parameter data measured at center-of-mass energies between $Q=35$ and 207 GeV. The experimental data is compared to a ${\mathrm{N}}^{3}{\mathrm{LL}}^{\ensuremath{'}}+\mathcal{O}({\ensuremath{\alpha}}_{s}^{3})+{\mathrm{\ensuremath{\Omega}}}_{1}$ theoretical prediction (up to the missing four-loop cusp anomalous dimension), which includes power corrections coming from a field-theoretical nonperturbative soft function. The dominant hadronic Parameter is its first moment ${\mathrm{\ensuremath{\Omega}}}_{1}$, which is defined in a scheme which eliminates the $\mathcal{O}({\mathrm{\ensuremath{\Lambda}}}_{\mathrm{QCD}})$ renormalon ambiguity. The resummation region plays a dominant role in the $C$-Parameter spectrum, and in this region a fit for ${\ensuremath{\alpha}}_{s}({m}_{Z})$ and ${\mathrm{\ensuremath{\Omega}}}_{1}$ is sufficient. We find ${\ensuremath{\alpha}}_{s}({m}_{Z})=0.1123\ifmmode\pm\else\textpm\fi{}0.0015$ and ${\mathrm{\ensuremath{\Omega}}}_{1}=0.421\ifmmode\pm\else\textpm\fi{}0.063\text{ }\text{ }\mathrm{GeV}$ with ${\ensuremath{\chi}}^{2}/\mathrm{d}.\mathrm{o}.\mathrm{f}.=0.988$ for 404 bins of data. These results agree with the prediction of universality for ${\mathrm{\ensuremath{\Omega}}}_{1}$ between thrust and $C$-Parameter within 1-$\ensuremath{\sigma}$.
Claudio Castellani - One of the best experts on this subject based on the ideXlab platform.
-
Universal scaling of the order-Parameter Distribution in strongly disordered superconductors
Physical Review B, 2013Co-Authors: Gabriel Lemarié, Anand Kamlapure, Somesh Chandra Ganguli, D. Bucheli, Lara Benfatto, José Lorenzana, G. Seibold, Pratap Raychaudhuri, Claudio CastellaniAbstract:International audienc
-
Universal Scaling of the order Parameter Distribution in strongly disordered superconductors
Bulletin of the American Physical Society, 2013Co-Authors: Anand Kamlapure, Somesh Chandra Ganguli, D. Bucheli, Lara Benfatto, José Lorenzana, Claudio Castellani, G. Seibold, Pratap RaychaudhuriAbstract:We investigate theoretically and experimentally the statistical properties of the inhomogeneous order-Parameter Distribution (OPD) at the verge of the superconductor-insulator transition (SIT). We find within two prototype fermionic and bosonic models for disordered superconductors that one can identify a universal rescaling of the OPD. By performing scanning-tunneling microscopy experiments in three samples of NbN with increasing disorder we show that such a rescaling also describes the experimental data with excellent accuracy. These results can provide a breakthrough in our understanding of the SIT.
Pratap Raychaudhuri - One of the best experts on this subject based on the ideXlab platform.
-
Universal scaling of the order-Parameter Distribution in strongly disordered superconductors
Physical Review B, 2013Co-Authors: Gabriel Lemarié, Anand Kamlapure, Somesh Chandra Ganguli, D. Bucheli, Lara Benfatto, José Lorenzana, G. Seibold, Pratap Raychaudhuri, Claudio CastellaniAbstract:International audienc
-
Universal Scaling of the order Parameter Distribution in strongly disordered superconductors
Bulletin of the American Physical Society, 2013Co-Authors: Anand Kamlapure, Somesh Chandra Ganguli, D. Bucheli, Lara Benfatto, José Lorenzana, Claudio Castellani, G. Seibold, Pratap RaychaudhuriAbstract:We investigate theoretically and experimentally the statistical properties of the inhomogeneous order-Parameter Distribution (OPD) at the verge of the superconductor-insulator transition (SIT). We find within two prototype fermionic and bosonic models for disordered superconductors that one can identify a universal rescaling of the OPD. By performing scanning-tunneling microscopy experiments in three samples of NbN with increasing disorder we show that such a rescaling also describes the experimental data with excellent accuracy. These results can provide a breakthrough in our understanding of the SIT.
Andre H. Hoang - One of the best experts on this subject based on the ideXlab platform.
-
$C$-Parameter Distribution at N$^3$LL′ including power corrections
Physical Review D, 2015Co-Authors: Andre H. Hoang, Daniel W. Kolodrubetz, Vicent Mateu, Iain W. StewartAbstract:We compute the e[superscript +]e[superscript -] C-Parameter Distribution using the soft-collinear effective theory with a resummation to next-to-next-to-next-to-leading-log prime accuracy of the most singular partonic terms. This includes the known fixed-order QCD results up to O(α[3 over s]), a numerical determination of the two-loop nonlogarithmic term of the soft function, and all logarithmic terms in the jet and soft functions up to three loops. Our result holds for C in the peak, tail, and far tail regions. Additionally, we treat hadronization effects using a field theoretic nonperturbative soft function, with moments Ω[subscript n]. To eliminate an O(Λ[subscript QCD]) renormalon ambiguity in the soft function, we switch from the [bar over MS] to a short distance “Rgap” scheme to define the leading power correction Parameter Ω[subscript 1]. We show how to simultaneously account for running effects in Ω[subscript 1] due to renormalon subtractions and hadron-mass effects, enabling power correction universality between C-Parameter and thrust to be tested in our setup. We discuss in detail the impact of resummation and renormalon subtractions on the convergence. In the relevant fit region for α[subscript s](m[subscript Z]) and Ω[subscript 1], the perturbative uncertainty in our cross section is ≃ 2.5% at Q = m[subscript Z].United States. Dept. of Energy. Office of Nuclear Physics (Contract DE-SC0011090)European Community. Marie-Curie Research Networks (Contract PITN-GA-2010-264564 (LHCphenOnet))Simons Foundation (Investigator Grant 327942
-
Precise determination of $\alpha_s$ from the $C$-Parameter Distribution
Physical Review D, 2015Co-Authors: Andre H. Hoang, Daniel W. Kolodrubetz, Vicent Mateu, Iain W. StewartAbstract:nal states coming from the underlying partons created in the collisions appear as boosted and collimated groups of hadrons known as jets. Event shapes have proven to be very successful to study these collisions quantitatively. They combine the energy and momenta of all of the measured hadrons into an infraredand collinear-safe Parameter which describes the geometric properties of the whole event by a single variable Distribution. Due to their global nature event shapes have nice theoretical properties, making it possible to obtain very accurate theoretical predictions using QCD. Most e + e event shape variables quantify how well the event resembles the situation of two narrow back-to-back jets, called dijets, by vanishing in this limit. Because the dijet limit involves restrictions that only allow collinear and soft degrees of freedom for the nal-state radiation, such
-
c Parameter Distribution at n 3 ll including power corrections
Physical Review D, 2015Co-Authors: Andre H. Hoang, Daniel W. Kolodrubetz, Vicent Mateu, Iain W. StewartAbstract:the leading power correction Parameter 1. We show how to simultaneously account for running eects in 1 due to renormalon subtractions and hadron-mass eects, enabling power correction universality between C-Parameter and thrust to be tested in our setup. We discuss in detail the impact of resummation and renormalon subtractions on the convergence. In the relevant t region for
-
precise determination of α s from the c Parameter Distribution
Physical Review D, 2015Co-Authors: Andre H. Hoang, Daniel W. Kolodrubetz, Vicent Mateu, Iain W. StewartAbstract:We present a global fit for ${\ensuremath{\alpha}}_{s}({m}_{Z})$, analyzing the available $C$-Parameter data measured at center-of-mass energies between $Q=35$ and 207 GeV. The experimental data is compared to a ${\mathrm{N}}^{3}{\mathrm{LL}}^{\ensuremath{'}}+\mathcal{O}({\ensuremath{\alpha}}_{s}^{3})+{\mathrm{\ensuremath{\Omega}}}_{1}$ theoretical prediction (up to the missing four-loop cusp anomalous dimension), which includes power corrections coming from a field-theoretical nonperturbative soft function. The dominant hadronic Parameter is its first moment ${\mathrm{\ensuremath{\Omega}}}_{1}$, which is defined in a scheme which eliminates the $\mathcal{O}({\mathrm{\ensuremath{\Lambda}}}_{\mathrm{QCD}})$ renormalon ambiguity. The resummation region plays a dominant role in the $C$-Parameter spectrum, and in this region a fit for ${\ensuremath{\alpha}}_{s}({m}_{Z})$ and ${\mathrm{\ensuremath{\Omega}}}_{1}$ is sufficient. We find ${\ensuremath{\alpha}}_{s}({m}_{Z})=0.1123\ifmmode\pm\else\textpm\fi{}0.0015$ and ${\mathrm{\ensuremath{\Omega}}}_{1}=0.421\ifmmode\pm\else\textpm\fi{}0.063\text{ }\text{ }\mathrm{GeV}$ with ${\ensuremath{\chi}}^{2}/\mathrm{d}.\mathrm{o}.\mathrm{f}.=0.988$ for 404 bins of data. These results agree with the prediction of universality for ${\mathrm{\ensuremath{\Omega}}}_{1}$ between thrust and $C$-Parameter within 1-$\ensuremath{\sigma}$.
Anand Kamlapure - One of the best experts on this subject based on the ideXlab platform.
-
Universal scaling of the order-Parameter Distribution in strongly disordered superconductors
Physical Review B, 2013Co-Authors: Gabriel Lemarié, Anand Kamlapure, Somesh Chandra Ganguli, D. Bucheli, Lara Benfatto, José Lorenzana, G. Seibold, Pratap Raychaudhuri, Claudio CastellaniAbstract:International audienc
-
Universal Scaling of the order Parameter Distribution in strongly disordered superconductors
Bulletin of the American Physical Society, 2013Co-Authors: Anand Kamlapure, Somesh Chandra Ganguli, D. Bucheli, Lara Benfatto, José Lorenzana, Claudio Castellani, G. Seibold, Pratap RaychaudhuriAbstract:We investigate theoretically and experimentally the statistical properties of the inhomogeneous order-Parameter Distribution (OPD) at the verge of the superconductor-insulator transition (SIT). We find within two prototype fermionic and bosonic models for disordered superconductors that one can identify a universal rescaling of the OPD. By performing scanning-tunneling microscopy experiments in three samples of NbN with increasing disorder we show that such a rescaling also describes the experimental data with excellent accuracy. These results can provide a breakthrough in our understanding of the SIT.
