skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Theoretical inputs and errors in the new hadronic currents in TAUOLA

Abstract

The new hadronic currents implemented in the TAUOLA library are obtained in the unified and consistent framework of Resonance Chiral Theory: a Lagrangian approach in which the resonances exchanged in the hadronic tau decays are active degrees of freedom included in a way that reproduces the low-energy results of Chiral Perturbation Theory. The short-distance QCD constraints on the imaginary part of the spin-one correlators yield relations among the couplings that render the theory predictive. In this communication, the obtaining of the two- and three-meson form factors is sketched. One of the criticisms to our framework is that the error may be as large as 1/3, since it is a realization of the large-N{sub C} limit of QCD in a meson theory. A number of arguments are given which disfavor that claim pointing to smaller errors, which would explain the phenomenological success of our description in these decays. Finally, other minor sources of error and current improvements of the code are discussed.

Authors:
; ; ; ;  [1];  [2];  [3];  [4];  [3]
  1. Grup de Fisica Teorica, Institut de Fisica d'Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Barcelona (Spain)
  2. (Germany)
  3. (Poland)
  4. (Spain)
Publication Date:
OSTI Identifier:
22075675
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1492; Journal Issue: 1; Conference: QCD-WORK 2012: International workshop on quantum chromodynamics: Theory and experiment, Lecce (Italy), 18-21 Jun 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHIRAL SYMMETRY; CHIRALITY; DEGREES OF FREEDOM; FORM FACTORS; HADRONIC PARTICLE DECAY; LAGRANGIAN FUNCTION; MESONS; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; SPIN; TAU PARTICLES

Citation Formats

Roig, P., Nugent, I. M., Przedzinski, T., Shekhovtsova, O., Was, Z., RWTH Aachen University, III. Physikalisches Institut B, Aachen, Faculty of Physics, Astronomy and Applied Computer Science, Jagellonian University, Reymonta 4, 30-059 Cracow, Poland and Institute of Nuclear Physics, PAN, Cracow, ul. Radzikowskiego 152, IFIC, Universitat de Valencia-CSIC, Apt. Correus 22085, E-46071, Valencia, and CERN PH-TH, CH-1211 Geneva 23, Switzerland and Institute of Nuclear Physics, PAN, Cracow, ul. Radzikowskiego 152. Theoretical inputs and errors in the new hadronic currents in TAUOLA. United States: N. p., 2012. Web. doi:10.1063/1.4763492.
Roig, P., Nugent, I. M., Przedzinski, T., Shekhovtsova, O., Was, Z., RWTH Aachen University, III. Physikalisches Institut B, Aachen, Faculty of Physics, Astronomy and Applied Computer Science, Jagellonian University, Reymonta 4, 30-059 Cracow, Poland and Institute of Nuclear Physics, PAN, Cracow, ul. Radzikowskiego 152, IFIC, Universitat de Valencia-CSIC, Apt. Correus 22085, E-46071, Valencia, & CERN PH-TH, CH-1211 Geneva 23, Switzerland and Institute of Nuclear Physics, PAN, Cracow, ul. Radzikowskiego 152. Theoretical inputs and errors in the new hadronic currents in TAUOLA. United States. doi:10.1063/1.4763492.
Roig, P., Nugent, I. M., Przedzinski, T., Shekhovtsova, O., Was, Z., RWTH Aachen University, III. Physikalisches Institut B, Aachen, Faculty of Physics, Astronomy and Applied Computer Science, Jagellonian University, Reymonta 4, 30-059 Cracow, Poland and Institute of Nuclear Physics, PAN, Cracow, ul. Radzikowskiego 152, IFIC, Universitat de Valencia-CSIC, Apt. Correus 22085, E-46071, Valencia, and CERN PH-TH, CH-1211 Geneva 23, Switzerland and Institute of Nuclear Physics, PAN, Cracow, ul. Radzikowskiego 152. Tue . "Theoretical inputs and errors in the new hadronic currents in TAUOLA". United States. doi:10.1063/1.4763492.
@article{osti_22075675,
title = {Theoretical inputs and errors in the new hadronic currents in TAUOLA},
author = {Roig, P. and Nugent, I. M. and Przedzinski, T. and Shekhovtsova, O. and Was, Z. and RWTH Aachen University, III. Physikalisches Institut B, Aachen and Faculty of Physics, Astronomy and Applied Computer Science, Jagellonian University, Reymonta 4, 30-059 Cracow, Poland and Institute of Nuclear Physics, PAN, Cracow, ul. Radzikowskiego 152 and IFIC, Universitat de Valencia-CSIC, Apt. Correus 22085, E-46071, Valencia and CERN PH-TH, CH-1211 Geneva 23, Switzerland and Institute of Nuclear Physics, PAN, Cracow, ul. Radzikowskiego 152},
abstractNote = {The new hadronic currents implemented in the TAUOLA library are obtained in the unified and consistent framework of Resonance Chiral Theory: a Lagrangian approach in which the resonances exchanged in the hadronic tau decays are active degrees of freedom included in a way that reproduces the low-energy results of Chiral Perturbation Theory. The short-distance QCD constraints on the imaginary part of the spin-one correlators yield relations among the couplings that render the theory predictive. In this communication, the obtaining of the two- and three-meson form factors is sketched. One of the criticisms to our framework is that the error may be as large as 1/3, since it is a realization of the large-N{sub C} limit of QCD in a meson theory. A number of arguments are given which disfavor that claim pointing to smaller errors, which would explain the phenomenological success of our description in these decays. Finally, other minor sources of error and current improvements of the code are discussed.},
doi = {10.1063/1.4763492},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1492,
place = {United States},
year = {2012},
month = {10}
}