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Pregled bibliografske jedinice broj: 1060474

First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons

(A2 Collaboration at MAMI) Käser, A.; Dieterle, M.; Witthauer, L.; Abt, S.; Achenbach, P.; Adlarson, P.; Afzal, F.; Ahmed, Z.; Ahrens, J.; Annand, J.R.M. et al.
First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons // Physics letters. B, 786 (2018), 305-312 doi:10.1016/j.physletb.2018.10.006 (međunarodna recenzija, članak, znanstveni)

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Naslov
First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons

Autori
Käser, A. ; Dieterle, M. ; Witthauer, L. ; Abt, S. ; Achenbach, P. ; Adlarson, P. ; Afzal, F. ; Ahmed, Z. ; Ahrens, J. ; Annand, J.R.M. ; Arends, H.J. ; Bashkanov, M. ; Beck, R. ; Biroth, M. ; Borisov, N.S. ; Braghieri, A. ; Briscoe, W.J. ; Cividini, F. ; Collicott, C. ; Costanza, S. ; Denig, A. ; Downie, E.J. ; Drexler, P. ; Fix, A. ; Garni, S. ; Glazier, D.I. ; Gorodnov, I. ; Gradl, W. ; Günther, M. ; Gurevich, G.M. ; Heijkenskjöld, L. ; Hornidge, D. ; Huber, G.M. ; Kashevarov, V.L. ; Kay, S. ; Keshelashvili, I. ; Kondratiev, R. ; Korolija, Milorad ; Krusche, B. ; Lazarev, A.B. ; Lisin, V. ; Livingston, K. ; Lutterer, S. ; MacGregor, I.J.D. ; Manley, D.M. ; Martel, P.P. ; Metag, V. ; Meyer, W. ; Miskimen, R. ; Mornacchi, E. ; Mushkarenkov, A. ; Neganov, A.B. ; Neiser, A. ; Oberle, M. ; Ostrick, M. ; Otte, P.B. ; Paudyal, D. ; Pedroni, P. ; Polonski, A. ; Prakhov, S.N. ; Reicherz, G. ; Ron, G. ; Rostomyan, T. ; Sarty, A. ; Sfienti, C. ; Sokhoyan, V. ; Spieker, K. ; Steffen, O. ; Strakovsky, I.I. ; Strub, Th. ; Supek, Ivan ; Thiel, A. ; Thiel, M. ; Thomas, A. ; Unverzagt, M. ; Usov, Yu.A. ; Wagner, S. ; Walford, N.K. ; Watts, D.P. ; Werthmüller, D. ; Wettig, J. ; Wolfes, M. ; Zana, L.

Kolaboracija
A2 Collaboration at MAMI

Izvornik
Physics letters. B (0370-2693) 786 (2018); 305-312

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

Ključne riječi
reaction gamma-p ; polarization ; eta ; mesons ; mami ; Pi(0)-pairs ; photon ; proton ; pairs

Sažetak
The helicity-dependent cross sections for the photoproduction of pi(0)eta pairs have been measured for the first time. The experiment was performed at the tagged photon facility of the Mainz MAMI accelerator with the combined Crystal Ball-TAPS calorimeter. The experiment used a polarized deuterated butanol target and a circularly polarized photon beam. This arrangement allowed the sigma(1/2)(photon and target spinantiparallel) and sigma(3/2) (parallel spins) components to be measured for quasi-free production of pi(0)n pairs off protons and neutrons. The main finding is that the two helicity components contribute identically, within uncertainties, for both participant protons and neutrons. The absolute couplings for protons and neutrons are also identical. This means that nucleon resonances contributing to this reaction in the investigated energy range have almost equal electromagnetic helicity couplings, A(1/2)(n, p) and A(3/2)(n, p) Identical couplings for protons and neutrons are typical for Delta resonances and identical A(1/2) and A(3/2)components are only possible for J >= 3/2 states, which constrains possible contributions of nucleon resonances.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Ivan Supek (autor)

Avatar Url Milorad Korolija (autor)

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com doi.org arxiv.org fulir.irb.hr

Citiraj ovu publikaciju:

(A2 Collaboration at MAMI) Käser, A.; Dieterle, M.; Witthauer, L.; Abt, S.; Achenbach, P.; Adlarson, P.; Afzal, F.; Ahmed, Z.; Ahrens, J.; Annand, J.R.M. et al.
First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons // Physics letters. B, 786 (2018), 305-312 doi:10.1016/j.physletb.2018.10.006 (međunarodna recenzija, članak, znanstveni)
(A2 Collaboration at MAMI) (A2 Collaboration at MAMI) Käser, A., Dieterle, M., Witthauer, L., Abt, S., Achenbach, P., Adlarson, P., Afzal, F., Ahmed, Z., Ahrens, J. & Annand, J. (2018) First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons. Physics letters. B, 786, 305-312 doi:10.1016/j.physletb.2018.10.006.
@article{article, author = {K\"{a}ser, A. and Dieterle, M. and Witthauer, L. and Abt, S. and Achenbach, P. and Adlarson, P. and Afzal, F. and Ahmed, Z. and Ahrens, J. and Annand, J.R.M. and Arends, H.J. and Bashkanov, M. and Beck, R. and Biroth, M. and Borisov, N.S. and Braghieri, A. and Briscoe, W.J. and Cividini, F. and Collicott, C. and Costanza, S. and Denig, A. and Downie, E.J. and Drexler, P. and Fix, A. and Garni, S. and Glazier, D.I. and Gorodnov, I. and Gradl, W. and G\"{u}nther, M. and Gurevich, G.M. and Heijkenskj\"{o}ld, L. and Hornidge, D. and Huber, G.M. and Kashevarov, V.L. and Kay, S. and Keshelashvili, I. and Kondratiev, R. and Korolija, Milorad and Krusche, B. and Lazarev, A.B. and Lisin, V. and Livingston, K. and Lutterer, S. and MacGregor, I.J.D. and Manley, D.M. and Martel, P.P. and Metag, V. and Meyer, W. and Miskimen, R. and Mornacchi, E. and Mushkarenkov, A. and Neganov, A.B. and Neiser, A. and Oberle, M. and Ostrick, M. and Otte, P.B. and Paudyal, D. and Pedroni, P. and Polonski, A. and Prakhov, S.N. and Reicherz, G. and Ron, G. and Rostomyan, T. and Sarty, A. and Sfienti, C. and Sokhoyan, V. and Spieker, K. and Steffen, O. and Strakovsky, I.I. and Strub, Th. and Supek, Ivan and Thiel, A. and Thiel, M. and Thomas, A. and Unverzagt, M. and Usov, Yu.A. and Wagner, S. and Walford, N.K. and Watts, D.P. and Werthm\"{u}ller, D. and Wettig, J. and Wolfes, M. and Zana, L.}, year = {2018}, pages = {305-312}, DOI = {10.1016/j.physletb.2018.10.006}, keywords = {reaction gamma-p, polarization, eta, mesons, mami, Pi(0)-pairs, photon, proton, pairs}, journal = {Physics letters. B}, doi = {10.1016/j.physletb.2018.10.006}, volume = {786}, issn = {0370-2693}, title = {First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons}, keyword = {reaction gamma-p, polarization, eta, mesons, mami, Pi(0)-pairs, photon, proton, pairs} }
@article{article, author = {K\"{a}ser, A. and Dieterle, M. and Witthauer, L. and Abt, S. and Achenbach, P. and Adlarson, P. and Afzal, F. and Ahmed, Z. and Ahrens, J. and Annand, J.R.M. and Arends, H.J. and Bashkanov, M. and Beck, R. and Biroth, M. and Borisov, N.S. and Braghieri, A. and Briscoe, W.J. and Cividini, F. and Collicott, C. and Costanza, S. and Denig, A. and Downie, E.J. and Drexler, P. and Fix, A. and Garni, S. and Glazier, D.I. and Gorodnov, I. and Gradl, W. and G\"{u}nther, M. and Gurevich, G.M. and Heijkenskj\"{o}ld, L. and Hornidge, D. and Huber, G.M. and Kashevarov, V.L. and Kay, S. and Keshelashvili, I. and Kondratiev, R. and Korolija, Milorad and Krusche, B. and Lazarev, A.B. and Lisin, V. and Livingston, K. and Lutterer, S. and MacGregor, I.J.D. and Manley, D.M. and Martel, P.P. and Metag, V. and Meyer, W. and Miskimen, R. and Mornacchi, E. and Mushkarenkov, A. and Neganov, A.B. and Neiser, A. and Oberle, M. and Ostrick, M. and Otte, P.B. and Paudyal, D. and Pedroni, P. and Polonski, A. and Prakhov, S.N. and Reicherz, G. and Ron, G. and Rostomyan, T. and Sarty, A. and Sfienti, C. and Sokhoyan, V. and Spieker, K. and Steffen, O. and Strakovsky, I.I. and Strub, Th. and Supek, Ivan and Thiel, A. and Thiel, M. and Thomas, A. and Unverzagt, M. and Usov, Yu.A. and Wagner, S. and Walford, N.K. and Watts, D.P. and Werthm\"{u}ller, D. and Wettig, J. and Wolfes, M. and Zana, L.}, year = {2018}, pages = {305-312}, DOI = {10.1016/j.physletb.2018.10.006}, keywords = {reaction gamma-p, polarization, eta, mesons, mami, Pi(0)-pairs, photon, proton, pairs}, journal = {Physics letters. B}, doi = {10.1016/j.physletb.2018.10.006}, volume = {786}, issn = {0370-2693}, title = {First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons}, keyword = {reaction gamma-p, polarization, eta, mesons, mami, Pi(0)-pairs, photon, proton, pairs} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus

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