Meson electro-/photo-production from QCD

Briceno, Raul A.

doi:10.1007/s00601-016-1124-y

Title: Meson electro-/photo-production from QCD

Abstract

I present the calculation of the $$\pi^+\gamma^\star\to\pi^+\pi^0$$ transition amplitude from quantum chromodynamics performed by the Hadron Spectrum Collaboration. The amplitude is determined for a range of values of the photon virtuality and the final state energy. One observes a clear dynamical enhancement due to the presence of the $$\rho$$ resonance. By fitting the transition amplitude and analytically continuing it onto the $$\rho$$-pole, the $$\rho\to\pi\gamma^\star$$ form factor is obtained. This exploratory calculation, performed using lattice quantum chromodynamics, constitutes the very first determination of an electroweak decay of a hadronic resonance directly from the fundamental theory of quarks and gluons. In this talk, I highlight some of the necessary steps that made this calculation possible, placing emphasis on recently developed formalism. In conclusion, I discuss the status and outlook of the field for the study of $$N\gamma^\star\to N^\star\to N\pi$$ transitions.

Authors:

Briceno, Raul A. ^[1]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States)

Publication Date:: Sat Jul 02 00:00:00 EDT 2016

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1330673

Report Number(s):: JLAB-THY-15-2153; DOE/OR/23177-3851; arXiv:1604.03782
Journal ID: ISSN 0177-7963; PII: 1124

Grant/Contract Number:: AC05-06OR23177

Resource Type:: Accepted Manuscript

Journal Name:: Few-Body Systems

Additional Journal Information:: Journal Volume: 57; Journal Issue: 10; Conference: "Nucleon Resonances: from Photoproduction to High Photon Virtualities", ECT, Trento (Italy), 12-16 Oct 2015; Journal ID: ISSN 0177-7963

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Briceno, Raul A. Meson electro-/photo-production from QCD.  United States: N. p., 2016. 
Web.  doi:10.1007/s00601-016-1124-y.

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                    Briceno, Raul A. Meson electro-/photo-production from QCD.  United States.  https://doi.org/10.1007/s00601-016-1124-y

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                    Briceno, Raul A. Sat .  
"Meson electro-/photo-production from QCD".  United States.  https://doi.org/10.1007/s00601-016-1124-y.  https://www.osti.gov/servlets/purl/1330673.

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@article{osti_1330673,

  title        = {Meson electro-/photo-production from QCD},

  author       = {Briceno, Raul A.},

  abstractNote = {I present the calculation of the $\pi^+\gamma^\star\to\pi^+\pi^0$ transition amplitude from quantum chromodynamics performed by the Hadron Spectrum Collaboration. The amplitude is determined for a range of values of the photon virtuality and the final state energy. One observes a clear dynamical enhancement due to the presence of the $\rho$ resonance. By fitting the transition amplitude and analytically continuing it onto the $\rho$-pole, the $\rho\to\pi\gamma^\star$ form factor is obtained. This exploratory calculation, performed using lattice quantum chromodynamics, constitutes the very first determination of an electroweak decay of a hadronic resonance directly from the fundamental theory of quarks and gluons. In this talk, I highlight some of the necessary steps that made this calculation possible, placing emphasis on recently developed formalism. In conclusion, I discuss the status and outlook of the field for the study of $N\gamma^\star\to N^\star\to N\pi$ transitions.},

  doi          = {10.1007/s00601-016-1124-y},

  journal      = {Few-Body Systems},

  number       = 10,

  volume       = 57,

  place        = {United States},

  year         = {Sat Jul 02 00:00:00 EDT 2016},

  month        = {Sat Jul 02 00:00:00 EDT 2016}

}

Copy to clipboard

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Title: Meson electro-/photo-production from QCD

Abstract

Citation Formats

Baryon mass splittings and strong CP violation in SU(3) Chiral Perturbation Theory text, January 2015

D s mesons with D K and D * K scattering near threshold journal, August 2014

Multiple-channel generalization of Lellouch-Lüscher formula journal, July 2012

Scattering in the π N negative parity channel in lattice QCD journal, March 2013

Moving multichannel systems in a finite volume with application to proton-proton fusion journal, November 2013

Evidence for X ( 3872 ) from D D * Scattering on the Lattice journal, November 2013

Resonances in Coupled π K − η K Scattering from Quantum Chromodynamics journal, October 2014

Finite volume corrections to the two-particle decay of states with nonzero momentum journal, December 2005

Resonances in coupled π K , η K scattering from lattice QCD journal, March 2015

Weak Transition Matrix Elements¶from Finite-Volume Correlation Functions journal, May 2001

Measurement of the resonance parameters and radiative width of the ρ + journal, June 1986

Resonance scattering phase shifts on a non-rest-frame lattice journal, September 1995

Calculation of B 0 → K * 0 μ + μ − and B s 0 → ϕ μ + μ − Observables Using Form Factors from Lattice QCD journal, May 2014

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Two-particle states on a torus and their relation to the scattering matrix journal, May 1991

The ϱ radiative decay width: A measurement at 200 GeV journal, January 1987

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K→ππ decays in a finite volume journal, December 2001

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Finite-volume effects for two-hadron states in moving frames journal, October 2005

Two-particle multichannel systems in a finite volume with arbitrary spin journal, April 2014

Expressing the three-particle finite-volume spectrum in terms of the three-to-three scattering amplitude journal, December 2015

Multichannel 1 → 2 transition amplitudes in a finite volume journal, February 2015

π π Partial-Wave Analysis from Reactions π + p → π + π − Δ + + and π + p → K + K − Δ + + at 7.1 GeV/ c journal, March 1973

ππ phase-shift analysis below the threshold journal, September 1974

Volume dependence of the energy spectrum in massive quantum field theories: II. Scattering states journal, June 1986

Nuclear reactions from lattice QCD journal, January 2015

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Baryon mass splittings and strong CP violation in SU(3) Chiral Perturbation Theory
text, January 2015

$D_{s}$ mesons with $D K$ and $D * K$ scattering near threshold
journal, August 2014

Multiple-channel generalization of Lellouch-Lüscher formula
journal, July 2012

Scattering in the $π N$ negative parity channel in lattice QCD
journal, March 2013

Moving multichannel systems in a finite volume with application to proton-proton fusion
journal, November 2013

Evidence for $X (3872)$ from $D D^{*}$ Scattering on the Lattice
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Resonances in Coupled $π K − η K$ Scattering from Quantum Chromodynamics
journal, October 2014

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Weak Transition Matrix Elements¶from Finite-Volume Correlation Functions
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Measurement of the resonance parameters and radiative width of the $ρ^{+}$
journal, June 1986

Resonance scattering phase shifts on a non-rest-frame lattice
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Energy dependence of the $ρ$ resonance in $π π$ elastic scattering from lattice QCD
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The ϱ radiative decay width: A measurement at 200 GeV
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