Abstract
We have investigated the role of hyperon resonances in the kaon photoproduction process, γ p → K +Λ, by using a covariant isobar model. To this end, new experimental data are used in the fitting process, whereas the old SAPHIR 1998 data are also used for comparison. The result indicates that the Λ(1600)P 01 and Λ(1810)P 01 hyperon resonances can significantly reduce the χ2 and, simultaneously, can increase the hadronic form factor cut-off in the background terms. This finding is different from the result of the previous studies, which showed that the Λ(1800)S 01 was important for this purpose, instead of the Λ(1600)P 01.
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References
Beringer J. et al.: Review of particle physics. Phys. Rev. D 86, 010001 (2012)
Isgur N., Karl G.: Hyperfine interactions in negative parity baryons. Phys. Lett. B 72, 109–113 (1977)
Koniuk R., Isgur N.: Baryon decays in a quark model with chromodynamics. Phys. Rev. D 21, 1868–1886 (1980)
Capstick S., Roberts W.: Quasi-two-body decays of nonstrange baryons. Phys. Rev. D 49, 4570–4586 (1994)
Noumi, H., et al.: Spectroscopic study of hyperon resonances below k̄N threshold via the (K −, n) reaction on deuteron. In: Proposal for the J-PARC 50 GeV Proton Synchrotron, Submitted to the 8th PAC Meeting, July 2009. http://j-parc.jp
Tranx M.Q., et al.: Measurement of γ p → K +Λ and γ p → K + Σ0 at photon energies up to 2 GeV. Phys. Lett. B 445, 20–26 (1998)
Mart T., Bennhold C.: Evidence for a missing nucleon resonance in kaon photoproduction. Phys. Rev. C 61, 012201 (1999)
Janssen S., Ryckebusch J., Van Nespen W., Debruyne D., Van Cauteren T.: The role of hyperon resonances in p(γ, K +) Λ processes. Eur. Phys. J. A 11, 105–111 (2001)
Mart T., van der Ventel B.I.S.: Photo- and electroproduction of the hypertriton on 3He. Phys. Rev. C 78, 014004 (2008)
Knöchlein G., Drechsel D., Tiator L.: Photo- and electroproduction of eta mesons. Z. Phys. A 352, 327–343 (1995)
Sarantsev A.V., Nikonov V.A., Anisovich A.V., Klempt E., Thoma U.: Decays of baryon resonances into Λ K +, Σ0 K + and Σ+ K 0. Eur. Phys. J. A 25, 441–453 (2005)
Mart T., Kholili M.J.: Origin of the second peak in the cross section of the K +Λ photoproduction. Phys. Rev. C 86, 022201(R) (2012)
Haberzettl H., Bennhold C., Mart T., Feuster T.: Gauge-invariant tree-level photoproduction amplitudes with form factors. Phys. Rev. C 58, R40–R44 (1998)
Mart, T., Sari, A.K.: Role of the hadronic form factors in the γ p → K +Λ process (2012, in preparation)
Bradford R. et al.: Differential cross sections for γ + p → K + + Y for Λ and Σ0 hyperons. Phys. Rev. C 73, 035202 (2006)
McCracken M.E. et al.: Differential cross section and recoil polarization measurements for the γ p → K +Λ reaction using CLAS at Jefferson Lab. Phys. Rev. C 81, 025201 (2010)
Sumihama M. et al.: The γ p → K +Λ and γ p → K + Σ0 reactions at forward angles with photon energies from 1.5 to 2.4 GeV. Phys. Rev. C 73, 035214 (2006)
Feller P. et al.: Photoproduction of K +Λ0 and K + Σ0 from hydrogen at constant momentum transfer t between 1.05 and 2.2 GeV. Nucl. Phys. B 39, 413–420 (1972)
Available at the Maid homepage http://www.kph.uni-mainz.de/MAID/kaon/kaonmaid.html. The published versions can be found in: Ref. [7]
Mart T.: Role of P 13(1720) in K Σ photoproduction. Phys. Rev. C 62, 038201 (2000)
Bennhold, C., Haberzettl, H., Mart, T.: A new resonance in K +Λ electroproduction: the D 13(1895) and its electromagnetic form factors. arXiv:nucl-th/9909022
Kim S.-H., Nam S., Oh Y., Kim H.-C.: Contribution of higher nucleon resonances to K * Λ photoproduction. Phys. Rev. D 84, 114023 (2011)
Bydžovský P., Mart T.: Analysis of the consistency of kaon photoproduction data with Λ in the final state. Phys. Rev. C 76, 065202 (2007)
Bradford R. et al.: First measurement of beam-recoil observables C x and C z in hyperon photoproduction. Phys. Rev. C 75, 035205 (2007)
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Dedicated to Professor Henryk Witala at the occasion of his 60th birthday.
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Mart, T., Nurhadiansyah, N. Are Hyperon Resonances Required in the Elementary K +Λ Photoproduction?. Few-Body Syst 54, 1729–1739 (2013). https://doi.org/10.1007/s00601-012-0497-9
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DOI: https://doi.org/10.1007/s00601-012-0497-9