Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold

Standard

Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold. / Adlarson, P.; Augustyniak, W.; Bardan, W. et al.

In: Physical Review Letters, Vol. 120, No. 2, 022002, 08.01.2018.

Research output: Contribution to journal › Article › peer-review

Harvard

Adlarson, P, Augustyniak, W, Bardan, W, Bashkanov, M, Bass, SD, Bergmann, FS, Berłowski, M, Bondar, A, Büscher, M, Calén, H, Ciepał, I, Clement, H, Czerwiński, E, Demmich, K, Engels, R, Erven, A, Erven, W, Eyrich, W, Fedorets, P, Föhl, K, Fransson, K, Goldenbaum, F, Goswami, A, Grigoryev, K, Gullström, CO, Heijkenskjöld, L, Hejny, V, Hüsken, N, Jarczyk, L, Johansson, T, Kamys, B, Kemmerling, G, Khatri, G, Khoukaz, A, Khreptak, O, Kirillov, DA, Kistryn, S, Kleines, H, Kłos, B, Krzemień, W, Kulessa, P, Kupść, A, Kuzmin, A, Lalwani, K, Lersch, D, Lorentz, B, Magiera, A, Maier, R, Marciniewski, P, Shwartz, B & The WASA-at-COSY Collaboration 2018, 'Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold', Physical Review Letters, vol. 120, no. 2, 022002. https://doi.org/10.1103/PhysRevLett.120.022002

APA

Adlarson, P., Augustyniak, W., Bardan, W., Bashkanov, M., Bass, S. D., Bergmann, F. S., Berłowski, M., Bondar, A., Büscher, M., Calén, H., Ciepał, I., Clement, H., Czerwiński, E., Demmich, K., Engels, R., Erven, A., Erven, W., Eyrich, W., Fedorets, P., ... The WASA-at-COSY Collaboration (2018). Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold. Physical Review Letters, 120(2), [022002]. https://doi.org/10.1103/PhysRevLett.120.022002

Vancouver

Adlarson P, Augustyniak W, Bardan W, Bashkanov M, Bass SD, Bergmann FS et al. Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold. Physical Review Letters. 2018 Jan 8;120(2):022002. doi: 10.1103/PhysRevLett.120.022002

Author

Adlarson, P. ; Augustyniak, W. ; Bardan, W. et al. / Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold. In: Physical Review Letters. 2018 ; Vol. 120, No. 2.

BibTeX

@article{952ab9e0437a4f33b1d5e1c9ba271b3e,

title = "Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold",

abstract = "Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high polarization degree of the proton beam of COSY, the reaction p→p→ppη has been measured close to threshold to explore the analyzing power Ay. The angular distribution of Ay is determined with the precision improved by more than 1 order of magnitude with respect to previous results, allowing a first accurate comparison with theoretical predictions. The determined analyzing power is consistent with zero for an excess energy of Q=15 MeV, signaling s-wave production with no evidence for higher partial waves. At Q=72 MeV the data reveal strong interference of Ps and Pp partial waves and cancellation of (Pp)2 and Ss∗Sd contributions. These results rule out the presently available theoretical predictions for the production mechanism of the η meson.",

keywords = "NEAR-THRESHOLD, QUASI-FREE, NUCLEON, FACILITY, COSY",

author = "P. Adlarson and W. Augustyniak and W. Bardan and M. Bashkanov and Bass, {S. D.} and Bergmann, {F. S.} and M. Ber{\l}owski and A. Bondar and M. B{\"u}scher and H. Cal{\'e}n and I. Ciepa{\l} and H. Clement and E. Czerwi{\'n}ski and K. Demmich and R. Engels and A. Erven and W. Erven and W. Eyrich and P. Fedorets and K. F{\"o}hl and K. Fransson and F. Goldenbaum and A. Goswami and K. Grigoryev and Gullstr{\"o}m, {C. O.} and L. Heijkenskj{\"o}ld and V. Hejny and N. H{\"u}sken and L. Jarczyk and T. Johansson and B. Kamys and G. Kemmerling and G. Khatri and A. Khoukaz and O. Khreptak and Kirillov, {D. A.} and S. Kistryn and H. Kleines and B. K{\l}os and W. Krzemie{\'n} and P. Kulessa and A. Kup{\'s}{\'c} and A. Kuzmin and K. Lalwani and D. Lersch and B. Lorentz and A. Magiera and R. Maier and P. Marciniewski and B. Shwartz and {The WASA-at-COSY Collaboration}",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = jan,

day = "8",

doi = "10.1103/PhysRevLett.120.022002",

language = "English",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "2",

}

RIS

TY - JOUR

T1 - Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold

AU - Adlarson, P.

AU - Augustyniak, W.

AU - Bardan, W.

AU - Bashkanov, M.

AU - Bass, S. D.

AU - Bergmann, F. S.

AU - Berłowski, M.

AU - Bondar, A.

AU - Büscher, M.

AU - Calén, H.

AU - Ciepał, I.

AU - Clement, H.

AU - Czerwiński, E.

AU - Demmich, K.

AU - Engels, R.

AU - Erven, A.

AU - Erven, W.

AU - Eyrich, W.

AU - Fedorets, P.

AU - Föhl, K.

AU - Fransson, K.

AU - Goldenbaum, F.

AU - Goswami, A.

AU - Grigoryev, K.

AU - Gullström, C. O.

AU - Heijkenskjöld, L.

AU - Hejny, V.

AU - Hüsken, N.

AU - Jarczyk, L.

AU - Johansson, T.

AU - Kamys, B.

AU - Kemmerling, G.

AU - Khatri, G.

AU - Khoukaz, A.

AU - Khreptak, O.

AU - Kirillov, D. A.

AU - Kistryn, S.

AU - Kleines, H.

AU - Kłos, B.

AU - Krzemień, W.

AU - Kulessa, P.

AU - Kupść, A.

AU - Kuzmin, A.

AU - Lalwani, K.

AU - Lersch, D.

AU - Lorentz, B.

AU - Magiera, A.

AU - Maier, R.

AU - Marciniewski, P.

AU - Shwartz, B.

AU - The WASA-at-COSY Collaboration

PY - 2018/1/8

Y1 - 2018/1/8

N2 - Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high polarization degree of the proton beam of COSY, the reaction p→p→ppη has been measured close to threshold to explore the analyzing power Ay. The angular distribution of Ay is determined with the precision improved by more than 1 order of magnitude with respect to previous results, allowing a first accurate comparison with theoretical predictions. The determined analyzing power is consistent with zero for an excess energy of Q=15 MeV, signaling s-wave production with no evidence for higher partial waves. At Q=72 MeV the data reveal strong interference of Ps and Pp partial waves and cancellation of (Pp)2 and Ss∗Sd contributions. These results rule out the presently available theoretical predictions for the production mechanism of the η meson.

AB - Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high polarization degree of the proton beam of COSY, the reaction p→p→ppη has been measured close to threshold to explore the analyzing power Ay. The angular distribution of Ay is determined with the precision improved by more than 1 order of magnitude with respect to previous results, allowing a first accurate comparison with theoretical predictions. The determined analyzing power is consistent with zero for an excess energy of Q=15 MeV, signaling s-wave production with no evidence for higher partial waves. At Q=72 MeV the data reveal strong interference of Ps and Pp partial waves and cancellation of (Pp)2 and Ss∗Sd contributions. These results rule out the presently available theoretical predictions for the production mechanism of the η meson.

KW - NEAR-THRESHOLD

KW - QUASI-FREE

KW - NUCLEON

KW - FACILITY

KW - COSY

UR - http://www.scopus.com/inward/record.url?scp=85040465958&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.120.022002

DO - 10.1103/PhysRevLett.120.022002

M3 - Article

C2 - 29376676

AN - SCOPUS:85040465958

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 2

M1 - 022002

ER -

ID: 9288001