Kaon Photoproduction and the Decay Parameter
Abstract
The weak decay parameter $$\alpha_-$$ of the $$\Lambda$$ is an important quantity for the extraction of polarization observables in various experiments. Moreover, in combination with $$\alpha_+$$ from $$\bar\Lambda$$ decay it provides a measure for matter-antimatter asymmetry. The weak decay parameter also affects the decay parameters of the $$\Xi$$ and $$\Omega$$ baryons and, in general, any quantity in which the polarization of the $$\Lambda$$ is relevant. The recently reported value by the BESIII collaboration of $0.750(9)(4)$ is significantly larger than the previous PDG value of $0.642(13)$ that had been accepted and used for over 40 years. In this work we make an independent estimate of $$\alpha_-$$, using an extensive set of polarization data measured in kaon photoproduction in the baryon resonance region and constraints set by spin algebra. The obtained value is 0.721(6)(5). The result is corroborated by multiple statistical tests as well as a modern phenomenological model, showing that our new value yields the best description of the data in question. Furthermore, our analysis supports the new BESIII finding that $$\alpha_-$$ is significantly larger than the previous PDG value. Any experimental quantity relying on the value of $$\alpha_-$$ should therefore be re-considered.
- Authors:
-
[1];
- Univ. of Glasgow, Glasgow (United Kingdom)
- The George Washington Univ., Washington, D.C. (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Forschungszentrum Jülich, Julich (Germany)
- The George Washington Univ., Washington, D.C. (United States)
- Univ. Bonn, Bonn (Germany)
- Publication Date:
- 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:
- 1572152
- Report Number(s):
- JLAB-THY-19-3019; DOE/OR/23177-4767; arXiv:1904.07616
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US2100205
- Grant/Contract Number:
- ST/P004458/1; PHY-1452055; AC05-06OR23177; SC0016582; TRR110; 11621131001; EP/M01326X/1; EP/R018634/1
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 123; Journal Issue: 18; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Ireland, David G., Döring, M., Glazier, Derek I., Haidenbauer, J., Mai, M., Murray-Smith, Roderick, and Rönchen, D. Kaon Photoproduction and the Λ Decay Parameter α–. United States: N. p., 2019.
Web. doi:10.1103/PhysRevLett.123.182301.
Ireland, David G., Döring, M., Glazier, Derek I., Haidenbauer, J., Mai, M., Murray-Smith, Roderick, & Rönchen, D. Kaon Photoproduction and the Λ Decay Parameter α–. United States. https://doi.org/10.1103/PhysRevLett.123.182301
Ireland, David G., Döring, M., Glazier, Derek I., Haidenbauer, J., Mai, M., Murray-Smith, Roderick, and Rönchen, D. Mon .
"Kaon Photoproduction and the Λ Decay Parameter α–". United States. https://doi.org/10.1103/PhysRevLett.123.182301. https://www.osti.gov/servlets/purl/1572152.
@article{osti_1572152,
title = {Kaon Photoproduction and the Λ Decay Parameter α–},
author = {Ireland, David G. and Döring, M. and Glazier, Derek I. and Haidenbauer, J. and Mai, M. and Murray-Smith, Roderick and Rönchen, D.},
abstractNote = {The weak decay parameter $\alpha_-$ of the $\Lambda$ is an important quantity for the extraction of polarization observables in various experiments. Moreover, in combination with $\alpha_+$ from $\bar\Lambda$ decay it provides a measure for matter-antimatter asymmetry. The weak decay parameter also affects the decay parameters of the $\Xi$ and $\Omega$ baryons and, in general, any quantity in which the polarization of the $\Lambda$ is relevant. The recently reported value by the BESIII collaboration of $0.750(9)(4)$ is significantly larger than the previous PDG value of $0.642(13)$ that had been accepted and used for over 40 years. In this work we make an independent estimate of $\alpha_-$, using an extensive set of polarization data measured in kaon photoproduction in the baryon resonance region and constraints set by spin algebra. The obtained value is 0.721(6)(5). The result is corroborated by multiple statistical tests as well as a modern phenomenological model, showing that our new value yields the best description of the data in question. Furthermore, our analysis supports the new BESIII finding that $\alpha_-$ is significantly larger than the previous PDG value. Any experimental quantity relying on the value of $\alpha_-$ should therefore be re-considered.},
doi = {10.1103/PhysRevLett.123.182301},
journal = {Physical Review Letters},
number = 18,
volume = 123,
place = {United States},
year = {2019},
month = {10}
}
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Works referenced in this record:
Partial-wave analysis of using a multichannel framework
journal, May 2019
- Hunt, B. C.; Manley, D. M.
- Physical Review C, Vol. 99, Issue 5
JURECA: Modular supercomputer at Jülich Supercomputing Centre
journal, January 2018
- Krause, Dorian; Thörnig, Philipp
- Journal of large-scale research facilities JLSRF, Vol. 4
Beam-recoil polarization transfer in the nucleon resonance region in the exclusive and reactions at the CLAS spectrometer
journal, June 2009
- Carman, D. S.; Raue, B. A.; Adhikari, K. P.
- Physical Review C, Vol. 79, Issue 6
Strong Evidence for Nucleon Resonances near 1900 MeV
journal, August 2017
- Anisovich, A. V.; Burkert, V.; Hadžimehmedović, M.
- Physical Review Letters, Vol. 119, Issue 6
The impact of $K^{+}\Lambda$ K + Λ photoproduction on the resonance spectrum
journal, June 2018
- Rönchen, D.; Döring, M.; Meißner, U. -G.
- The European Physical Journal A, Vol. 54, Issue 6
Coupled-channel analysis of production on the nucleon up to 2.0 GeV
journal, November 2013
- Cao, Xu; Shklyar, V.; Lenske, H.
- Physical Review C, Vol. 88, Issue 5
Antinucleon–nucleon interaction at low energy: scattering and protonium
journal, September 2002
- Klempt, Eberhard; Bradamante, Franco; Martin, Anna
- Physics Reports, Vol. 368, Issue 2-3
Isospin decomposition of transitions within a dynamical coupled-channels model
journal, July 2016
- Kamano, H.; Nakamura, S. X.; Lee, T. -S. H.
- Physical Review C, Vol. 94, Issue 1
Erratum to: Photocouplings at the pole from pion photoproduction
journal, May 2015
- Rönchen, D.; Döring, M.; Huang, F.
- The European Physical Journal A, Vol. 51, Issue 5
Production and Decay of Cascade Hyperons
journal, March 1969
- Dauber, Philip M.; Berge, J. Peter; Hubbard, J. Richard
- Physical Review, Vol. 179, Issue 5
Completeness rules for spin observables in pseudoscalar meson photoproduction
journal, April 1997
- Chiang, Wen-Tai; Tabakin, Frank
- Physical Review C, Vol. 55, Issue 4
First measurement of Ξ− polarization in photoproduction
journal, August 2018
- Bono, J.; Guo, L.; Raue, B. A.
- Physics Letters B, Vol. 783
Violation of CP in variance, C asymmetry, and baryon asymmetry of the universe
journal, May 1991
- Sakharov, Andrei D.
- Soviet Physics Uspekhi, Vol. 34, Issue 5
Bayesian Inference of the Resonance Content of
journal, May 2012
- De Cruz, Lesley; Vrancx, Tom; Vancraeyveld, Pieter
- Physical Review Letters, Vol. 108, Issue 18
Photocouplings at the pole from pion photoproduction
journal, June 2014
- Rönchen, D.; Döring, M.; Huang, F.
- The European Physical Journal A, Vol. 50, Issue 6
First measurement of beam-recoil observables and in hyperon photoproduction
journal, March 2007
- Bradford, R. K.; Schumacher, R. A.; Adams, G.
- Physical Review C, Vol. 75, Issue 3
Differential cross section and recoil polarization measurements for the reaction using CLAS at Jefferson Lab
journal, February 2010
- McCracken, M. E.; Bellis, M.; Meyer, C. A.
- Physical Review C, Vol. 81, Issue 2
Photoproduction of and hyperons using linearly polarized photons
journal, June 2016
- Paterson, C. A.; Ireland, D. G.; Livingston, K.
- Physical Review C, Vol. 93, Issue 6
On the validity of chiral perturbation theory for weak hyperon decays
journal, January 1985
- Bijnens, J.; Sonoda, H.; Wise, Mark B.
- Nuclear Physics B, Vol. 261
Partial-Wave Analysis of at
journal, June 1967
- Trippe, Thomas G.; Schlein, Peter E.
- Physical Review, Vol. 158, Issue 5
emcee : The MCMC Hammer
journal, March 2013
- Foreman-Mackey, Daniel; Hogg, David W.; Lang, Dustin
- Publications of the Astronomical Society of the Pacific, Vol. 125, Issue 925
Eta photoproduction in a combined analysis of pion- and photon-induced reactions
journal, June 2015
- Rönchen, D.; Döring, M.; Haberzettl, H.
- The European Physical Journal A, Vol. 51, Issue 6
A measurement of the β-parameter in the charged nonleptonic decay of the Λ0 hyperon
journal, January 1972
- Cleland, W. E.; Conforto, G.; Eaton, G. H.
- Nuclear Physics B, Vol. 40
Review of Particle Physics
journal, August 2018
- Tanabashi, M.; Hagiwara, K.; Hikasa, K.
- Physical Review D, Vol. 98, Issue 3
Gaussian Processes for Machine Learning
book, January 2005
- Rasmussen, Carl Edward; Williams, Christopher K. I.
- The MIT Press
Fitting parton distribution data with multiplicative normalization uncertainties
journal, May 2010
- Ball, Richard D.; Del Debbio, Luigi; Forte, Stefano
- Journal of High Energy Physics, Vol. 2010, Issue 5
Electromagnetic production of kaons from protons, and baryon electromagnetic form factors
journal, March 2012
- Maxwell, Oren V.
- Physical Review C, Vol. 85, Issue 3
Weak and Electromagnetic Interactions of Hyperons: a Chiral Approach
journal, October 2000
- Holstein, Barry R.
- International Journal of Modern Physics E, Vol. 09, Issue 05
Determining pseudoscalar meson photoproduction amplitudes from complete experiments
journal, April 2011
- Sandorfi, A. M.; Hoblit, S.; Kamano, H.
- Journal of Physics G: Nuclear and Particle Physics, Vol. 38, Issue 5
Measurement of the differential cross section and the spin-correlation parameters P, A and R in the backward peak of π−p→K0Λ at 5 GeV/c
journal, November 1975
- Astbury, P.; Gallivan, J.; Jafar, J.
- Nuclear Physics B, Vol. 99, Issue 1
On the use of the covariance matrix to fit correlated data
journal, July 1994
- D'Agostini, G.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 346, Issue 1-2
First Measurement of Transferred Polarization in the Exclusive Reaction
journal, April 2003
- Carman, D. S.; Joo, K.; Mestayer, M. D.
- Physical Review Letters, Vol. 90, Issue 13
Measurement of the transverse polarization of and hyperons produced in proton-proton collisions at using the ATLAS detector
journal, February 2015
- Aad, G.; Abbott, B.; Abdallah, J.
- Physical Review D, Vol. 91, Issue 3
Final state interactions in nonleptonic hyperon decays
journal, June 2003
- Borasoy, B.; Marco, E.
- Physical Review D, Vol. 67, Issue 11
Violation of <i>CP</i> in variance, <i>C</i> asymmetry, and baryon asymmetry of the universe [Нарушение CP-инвариантности. C-асимметрия и барионная асимметрия Вселенной]
journal, January 1991
- Sakharov, Andrei D.
- Uspekhi Fizicheskih Nauk, Vol. 161, Issue 5
Coupled-channel dynamics in the reactions πN → πN, ηN, KΛ, KΣ
journal, April 2013
- Rönchen, D.; Döring, M.; Huang, F.
- The European Physical Journal A, Vol. 49, Issue 4
Bayesian inference of the resonance content of p ( γ , K + ) Λ
journal, January 2012
- Vancraeyveld, P.; De Cruz, L.; Ryckebusch, J.
- EPJ Web of Conferences, Vol. 37
Review of Particle Physics
text, January 2018
- Tanabashi, M.; Hagiwara, K.; Hikasa, K.
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Measurement of the transverse polarization of Λ and Λ ¯ hyperons produced in proton-proton collisions at √s=7 TeV using the ATLAS detector
text, January 2015
- Atlas, Collaboration; Agustoni, Marco; Beck, Hans Peter
- American Physical Society
Review of Particle Physics
text, January 2012
- Beringer, J.; Arguin, J.; Barnett, R.
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Measurement of matter-antimatter differences in beauty baryon decays
text, January 2017
- Aaij, Roel; Adeva, Bernardo; Adinolfi, Marco
- RWTH Aachen University
Photocouplings at the Pole from Pion Photoproduction
text, January 2014
- Rönchen, D.; Döring, M.; Huang, F.
- arXiv
Eta photoproduction in a combined analysis of pion- and photon-induced reactions
text, January 2015
- Rönchen, D.; Döring, M.; Haberzettl, H.
- arXiv
Strong evidence for nucleon resonances near 1900\,MeV
text, January 2017
- Anisovich, A. V.; Burkert, V.; Hadžimehmedović, M.
- arXiv
Weak and Electromagnetic Interactions of Hyperons: a Chiral Approach
text, January 2000
- Holstein, Barry R.
- arXiv
Final state interactions in nonleptonic hyperon decays
text, January 2003
- Borasoy, B.; Marco, E.
- arXiv
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- Aaij, R.; Abellán Beteta, C.; Ackernley, T.
- Journal of High Energy Physics, Vol. 2020, Issue 6