P
Philip Stephens
Researcher at California Institute of Technology
Publications - 45
Citations - 1180
Philip Stephens is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Quantum chromodynamics & Monte Carlo method. The author has an hindex of 15, co-authored 45 publications receiving 991 citations. Previous affiliations of Philip Stephens include Polish Academy of Sciences & Google.
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New formalism for QCD parton showers
TL;DR: In this paper, a new formalism for parton shower simulation of QCD jets is presented, which incorporates the following features: covariant kinematics, improved treatment of heavy quark fragmentation, angular-ordered evolution with soft gluon coherence, more accurate softgluon angular distributions, and better coverage of phase space.
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Ionospheric Signatures of Tohoku-Oki Tsunami of March 11, 2011: Model Comparisons Near the Epicenter
David A. Galvan,David A. Galvan,Attila Komjathy,Michael P. Hickey,Philip Stephens,Jonathan B. Snively,Y. Tony Song,Mark D. Butala,Anthony J. Mannucci +8 more
TL;DR: In this paper, the effect of the Tohoku earthquake and tsunami on the ionosphere near the epicenter was observed in measurements of ionospheric total electron content from 1198 GPS receivers in the Japanese GEONET network.
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Detecting ionospheric TEC perturbations caused by natural hazards using a global network of GPS receivers: The Tohoku case study
Attila Komjathy,David A. Galvan,Philip Stephens,Mark D. Butala,Vardan Akopian,Brian Wilson,Olga P. Verkhoglyadova,Anthony J. Mannucci,Michael P. Hickey +8 more
TL;DR: In this article, a real-time Global Assimilative Ionospheric Model (GAIM) system was proposed to monitor TEC fluctuations using JPL's real-term Global Assimilation Model (GOMA) system.
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Herwig++ 1.0: An Event Generator for e+e- Annihilation
Stefan Gieseke,Alberto Ribon,Michael H. Seymour,Philip Stephens,Bryan R. Webber,Bryan R. Webber +5 more
TL;DR: In this article, the Monte Carlo event generator Herwig++ is used to simulate Hadron Emission Reactions with Interfering Gluons in electron-positron annihilation.
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CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge for systematic assessment of ionosphere/thermosphere models: NmF2, hmF2, and vertical drift using ground-based observations
J. Shim,Masha Kuznetsova,Lutz Rastätter,Michael Hesse,Dieter Bilitza,Mark D. Butala,Mihail Codrescu,Barbara A. Emery,B. Foster,Tim Fuller-Rowell,J. D. Huba,Anthony J. Mannucci,Xiaoqing Pi,Aaron J. Ridley,Ludger Scherliess,Robert W. Schunk,Philip Stephens,D. C. Thompson,Lie Zhu,David N. Anderson,Jorge L. Chau,Jan Josef Sojka,B. Rideout +22 more
TL;DR: The Coupling, Energetics, and Dynamics of Atmospheric Regions (CEDAR) Electrodynamics Thermosphere Ionosphere (ETI) Challenge was initiated in 2009 to assess accuracy of various ionosphere/thermosphere models in reproducing ionosphere and thermosphere parameters as discussed by the authors.