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Pregled bibliografske jedinice broj: 74559

Measurement of charge asymmetry braking by the comparison of pi+d --> pp eta with pi-d --> nn eta


Abaev, V.; Batinić, Mijo; Bekrenev, V.; Briscoe, W.J.; Chrien, R.E.; Clajus, M.; Isenhower, D.; Kozlenko, N.; Kruglov, S.; Leitch, M.J. et al.
Measurement of charge asymmetry braking by the comparison of pi+d --> pp eta with pi-d --> nn eta // Physical Review D, 63 (2001), 052001-052017 (međunarodna recenzija, članak, znanstveni)


Naslov
Measurement of charge asymmetry braking by the comparison of pi+d --> pp eta with pi-d --> nn eta

Autori
Abaev, V. ; Batinić, Mijo ; Bekrenev, V. ; Briscoe, W.J. ; Chrien, R.E. ; Clajus, M. ; Isenhower, D. ; Kozlenko, N. ; Kruglov, S. ; Leitch, M.J. ; Marušić, Aljoša ; Moriwaki, T. ; Morrison, T. ; Nefkens, B. M. K. ; Peng, J. C. ; Pile, P. H. ; Price, J. W. ; Rigsby, D. ; Sadler, M. E. ; Sawafta, R. ; Šlaus, Ivo ; Seyfarth, H. ; Starostin, A. ; Supek, Ivan ; Sutter, R.J. ; Švarc, Alfred ; White, D.B.

Izvornik
Physical Review D (0556-2821) 63 (2001); 052001-052017

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Pion-deuteron interactions; eta mesons; meson production; C invariance; spontaneous symmetry breaking; isotopic spin

Sažetak
We report a measurement of charge symmetry breaking in the NNeta system. We have measured the ratio of the differential cross sections of the charge-symmetric reactions pi+d-->ppeta and pi–d-->nneta in the energy region of the eta threshold. Our result is R[equivalent]dsigma(pi+d-->ppeta)/dsigma(pi–d-->nneta) = 0.938ą0.009 after a phase-space correction is made for the difference in the threshold energies of the two reactions. The deviation of R from unity is an indication of charge symmetry breaking, which is mostly due to pi0-eta mixing. A theoretical model for eta production which includes pi0-eta mixing was used to fit the data and yields a mixing angle of (1.5ą0.4)°. Our result is consistent with the mixing angle determined in particle decay and isospin-forbidden processes as well as predictions by several theoretical analyses which yield [approximate]1° and another which yields [approximate]2°.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
00980202

Ustanove
Institut "Ruđer Bošković", Zagreb

Citiraj ovu publikaciju

Abaev, V.; Batinić, Mijo; Bekrenev, V.; Briscoe, W.J.; Chrien, R.E.; Clajus, M.; Isenhower, D.; Kozlenko, N.; Kruglov, S.; Leitch, M.J. et al.
Measurement of charge asymmetry braking by the comparison of pi+d --> pp eta with pi-d --> nn eta // Physical Review D, 63 (2001), 052001-052017 (međunarodna recenzija, članak, znanstveni)
Abaev, V., Batinić, M., Bekrenev, V., Briscoe, W., Chrien, R., Clajus, M., Isenhower, D., Kozlenko, N., Kruglov, S. & Leitch, M. (2001) Measurement of charge asymmetry braking by the comparison of pi+d --> pp eta with pi-d --> nn eta. Physical Review D, 63, 052001-052017.
@article{article, year = {2001}, pages = {052001-052017}, keywords = {pion-deuteron interactions, eta mesons, meson production, C invariance, spontaneous symmetry breaking, isotopic spin}, journal = {Physical Review D}, volume = {63}, issn = {0556-2821}, title = {Measurement of charge asymmetry braking by the comparison of pi+d --> pp eta with pi-d --> nn eta}, keyword = {pion-deuteron interactions, eta mesons, meson production, C invariance, spontaneous symmetry breaking, isotopic spin} }

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