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We study power corrections to the differential thrust, heavy jet mass and C-parameter distributions in the two-jet kinematical region in e^+e^- annihilation. We argue that away from the end-point region, e>> \Lambda_{QCD}/Q, the leading…

High Energy Physics - Phenomenology · Physics 2009-10-31 G. P. Korchemsky , S. Tafat

Analytic and numeric approximations are studied in detail for a hydrodynamic parameterization of single-particle spectra and two-particle correlation functions in high energy hadron-proton and heavy ion reactions. Two very different sets of…

High Energy Physics - Phenomenology · Physics 2009-09-25 A. Ster , T. Csorgo , B. Lorstad

The strong coupling constant is a fundamental parameter of nature. It can be extracted from experiments measuring three-jet events in electron-positron annihilation. For this extraction precise theoretical calculations for jet rates and…

High Energy Physics - Phenomenology · Physics 2014-11-20 Stefan Weinzierl

This article gives the perturbative NNLO results for the most commonly used event shape variables associated to three-jet events in electron-positron annihilation: Thrust, heavy jet mass, wide jet broadening, total jet broadening, C…

High Energy Physics - Phenomenology · Physics 2009-10-16 Stefan Weinzierl

Data recorded by the JADE experiment at the PETRA e^+e^- collider were used to measure the event shape observables thrust, heavy jet mass, wide and total jet broadening and the differential 2-jet rate in the Durham scheme. For the latter…

High Energy Physics - Experiment · Physics 2014-11-17 P. A. Movilla Fernández , O. Biebel , S. Bethke , S. Kluth , P. Pfeifenschneider , the JADE Collaboration

We demonstrate the use of Event Shape Sorting in femtoscopy. The method allows to select events with similar distributions if hadrons in azimuthal angle. We show that also their correlation radii exhibit interesting dependence on azimuthal…

Nuclear Theory · Physics 2019-02-26 Jakub Cimerman , Boris Tomášik

Structure function of e+e- to hadrons cross section proportional to the longitudinal part of the hadron tensor is power suppressed with respect to an event shape variable in the two-jet region. In the SCET framework, we study the event…

High Energy Physics - Phenomenology · Physics 2010-10-28 Kaoru Hagiwara , Grigory Kirilin

Experimental falsification or validation of the Standard Model of Particle Physics involves the measurement of the CP quantum number and couplings of the Higgs boson. Both ATLAS and CMS have reported an SM Higgs-like excess around m_H=125…

High Energy Physics - Phenomenology · Physics 2015-06-04 Christoph Englert , Michael Spannowsky , Michihisa Takeuchi

The collimation $C$ of a hadronic event in the e^+e^- annihilation is defined as the average of $\cos\theta$, $C=<\cos\theta>$, where $\theta$ is the angle of each hadron measured from the thrust axis, and the average is over all the…

High Energy Physics - Phenomenology · Physics 2016-09-06 K. Kimura , K. Tesima

Shape restrictions have played a central role in economics as both testable implications of theory and sufficient conditions for obtaining informative counterfactual predictions. In this paper we provide a general procedure for inference…

Statistics Theory · Mathematics 2022-04-29 Victor Chernozhukov , Whitney K. Newey , Andres Santos

The discrepancy between the Standard Model theory and experimental measurement of the muon magnetic moment anomaly, $a_{\mu}=\left(g_{\mu}-2\right)/2$, is connected to precision electroweak (EW) predictions via their common dependence on…

High Energy Physics - Phenomenology · Physics 2020-08-25 Alexander Keshavarzi , William J. Marciano , Massimo Passera , Alberto Sirlin

A model--independent search for deviations from the Standard Model prediction is performed using the full $e^\pm p$ data sample collected by the H1 experiment at HERA. All event topologies involving isolated electrons, photons, muons,…

High Energy Physics - Experiment · Physics 2012-08-27 H1 Collaboration

Models for predicting the time of a future event are crucial for risk assessment, across a diverse range of applications. Existing time-to-event (survival) models have focused primarily on preserving pairwise ordering of estimated event…

Machine Learning · Statistics 2021-01-14 Paidamoyo Chapfuwa , Chenyang Tao , Lawrence Carin , Ricardo Henao

Two-particle angular correlations have been widely used as a tool to explore particle production mechanisms in heavy-ion collisions. The mixed-event technique is generally used as a standard method to correct for finite-acceptance effects.…

Nuclear Theory · Physics 2016-08-18 Saehanseul Oh , Tim Schuster , Andreas Morsch , Constantin Loizides

Deep-inelastic ep scattering data taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb^{-1} are used to study the differential distributions of event shape variables. These include thrust, jet…

High Energy Physics - Experiment · Physics 2012-08-27 H1 Collaboration

We present results for matched distributions of a range of dijet event shapes at hadron colliders, combining next-to-leading logarithmic (NLL) accuracy in the resummation exponent, next-to-next-to leading logarithmic (NNLL) accuracy in its…

High Energy Physics - Phenomenology · Physics 2014-11-20 Andrea Banfi , Gavin P. Salam , Giulia Zanderighi

We consider several classes of analytic parametrizations of hadronic scattering amplitudes, and compare their predictions to all available forward data in hadron-hadron, gamma-p and gamma-gamma reactions. Although these parametrizations are…

High Energy Physics - Phenomenology · Physics 2009-11-07 B. Nicolescu , J. R. Cudell , V. V. Ezhela , P. Gauron , K. Kang , Yu. V. Kuyanov , S. B. Lugovsky , E. Martynov , E. A. Razuvaev , N. P. Tkachenko

An accurate evaluation of the gravity acceleration from the timing of free fall of anti-hydrogen atoms in the GBAR experiment requires to account for obstacles surrounding the anti-matter source. These obstacles reduce the number of useful…

We suggested that longitudinal polarization of Lambda produced in e+e- annihilation at LEP energies can provide useful information on hadronization mechanism in general and on testing the validity of different pictures for the spin content…

High Energy Physics - Phenomenology · Physics 2007-05-23 Liang Zuo-tang

Measurements of two-particle angular correlations of charged particles emitted in hadronic $Z$ decays are presented. The archived $e^+e^-$ annihilation data at a center-of-mass energy of 91 GeV were collected with the ALEPH detector at LEP…