Search for η-mesic 4He in the dd → 3Henπ0 and dd → 3Hepπ- reactions with the WASA-at-COSY facility

被引：36

作者：

Adlarson, P. ^{[1
,12
,30
]}

Augustyniak, W. ^{[2
]}

Bardan, W. ^{[3
]}

Bashkanov, M. ^{[4
]}

Bergmann, F. S. ^{[5
]}

Berlowski, M. ^{[6
]}

Bhatt, H. ^{[7
]}

Bondar, A. ^{[8
,12
,30
]}

Buescher, M. ^{[31
,32
]}

Calen, H. ^{[1
]}

Ciepal, I. ^{[11
]}

Clement, H. ^{[12
,13
]}

Czerwinski, E. ^{[3
]}

Demmich, K. ^{[5
]}

Engels, R. ^{[10
]}

Erven, A. ^{[14
]}

Erven, W. ^{[14
]}

Eyrich, W. ^{[15
]}

Fedorets, P. ^{[10
,16
]}

Foehl, K. ^{[17
]}

Fransson, K. ^{[1
]}

Goldenbaum, E. ^{[10
]}

Goswami, A. ^{[10
,18
]}

Grigoryev, K. ^{[10
,19
,33
]}

Gullstroem, C. -O. ^{[1
]}

Heijkenskjold, L. ^{[1
]}

Hejny, V. ^{[10
]}

Huesken, N. ^{[5
]}

Jarczyk, L. ^{[3
]}

Johansson, T. ^{[1
]}

Kamys, B. ^{[3
]}

Kelkar, N. G. ^{[3
,20
]}

Kemmerling, G. ^{[14
,34
]}

Khatri, G. ^{[3
,35
]}

Khoukaz, A. ^{[5
]}

Khreptak, O. ^{[3
]}

Kirillov, D. A.

Kistryn, S. ^{[3
]}

Kleines, H. ^{[12
,14
]}

Klos, B. ^{[22
]}

Krzemien, W. ^{[6
]}

Kulessa, P. ^{[11
]}

Kupsc, A. ^{[1
,6
]}

Kuzmin, A. ^{[8
,9
]}

Lalwani, K. ^{[23
]}

Lersch, D. ^{[10
]}

Lorentz, B. ^{[10
]}

Magiera, A. ^{[3
]}

Maier, R. ^{[10
,24
,25
]}

Marciniewski, P. ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron, Div Nucl Phys, Box 516, S-75120 Uppsala, Sweden

[2] Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland

[3] Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland

[4] Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland

[5] WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany

[6] Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland

[7] Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India

[8] Budker Inst Nucl Phys SB RAS, 11 akademika Lavrentieva prospect, Novosibirsk 630090, Russia

[9] Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia

[10] Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany

[11] Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, 52 Radzikowskiego St, PL-31342 Krakow, Poland

[12] Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany

[13] Phys Inst Univ Tubingen, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany

[14] Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany

[15] Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany

[16] Russian Federat, Inst Theoret & Expt Phys, State Sci Ctr, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia

[17] Justus Liebig Univ Giessen, Physikal Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany

[18] Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India

[19] Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, Gatchina 188300, Russia

[20] Univ Los Andes, Dept Fis, Cra.IE,18A-10, Bogota, Colombia

[21] Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia

[22] Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland

[23] Malaviya Natl Inst Technol, Dept Phys, Jaipur 302017, Rajasthan, India

[24] Forschungszentrum Julich, JARA FAME, D-52425 Julich, Germany

[25] Rhein Westfal TH Aachen, D-52056 Aachen, Germany

[26] Ruhr Univ Bochum, Inst Experimentalphys 1, Univ 150, D-44780 Bochum, Germany

[27] Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia

[28] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan

[29] Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodi, Poland

[30] Johannes Gutenberg Univ Mainz, Inst Kemphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany

[31] Forschungszentrum Julich, Peter Grunberg Inst, PGI 6 Elekt Eigenschaften, D-52425 Julich, Germany

[32] Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ 1, D-40225 Dusseldorf, Germany

[33] Rhein Westfal TH Aachen, Physikal Inst B Physikzentrum 3, D-52056 Aachen, Germany

[34] Forschungszentrum Julich, JCNS, D-52425 Julich, Germany

[35] Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA

[36] INFN, Lab Nazl Frascati, Via Fermi,40, I-00044 Rome, Italy

来源：

NUCLEAR PHYSICS A | 2017年 / 959卷

关键词：

eta-Mesic nuclei; eta meson; BOUND-STATES; N-ASTERISK; NUCLEI;

D O I：

10.1016/j.nuclphysa.2017.01.001

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The search for He-4-eta bound states was performed with the WASA-at-COSY facility via the measurement of the excitation function for the dd -> (3)Hen pi(0) and dd -> (3)Hep pi(-) processes. The deuteron beam momentum was varied continuously between 2.127 GeV/c and 2.422 GeV/c, corresponding to the excess energy for the dd -> He-4 eta reaction ranging from Q = 70 MeV to Q = 30 MeV. The luminosity was determined based on the dd -> (3)Hen reaction and the quasi-free proton proton scattering via dd -> ppn(spectator)n(spectator) reactions. The excitation functions, determined independently for the measured reactions, do not reveal a structure which could be interpreted as a narrow mesic nucleus. Therefore, the upper limits of the total cross sections for the bound state production and decay in dd -> (4He-eta)(bound) -> (3)Hen pi(0) and dd -> (He-4-eta)(bound) -> (3)Hep pi(-) processes were determined taking into account the isospin relation between the both of the considered channels. The results of the analysis depend on the assumptions of the N* (1535) momentum distribution in the anticipated mesic-He-4. Assuming, as in the previous works, that this is identical with the distribution of nucleons bound with 20 MeV in He-4, we determined that (for the mesic bound state width in the range from 5 MeV to 50 MeV) the upper limits at 90% confidence level are about 3 nb and about 6 nb for n pi(0) and p pi(-) channels, respectively. However, based on the recent theoretical findings of the N*(1535) momentum distribution in the N*-He-3 nucleus bound by 3.6 MeV, we find that the WASA-at-COSY detector acceptance decreases and hence the corresponding upper limits are 5 nb and 10 nb for n pi(0) and p pi(-) channels respectively. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：102 / 115

页数：14

共 9 条

[1] Search for the 4He-η bound state in dd → (4He-η)bound → 3Henπ0 and dd → (4He-η)bound → 3Hepπ- reactions with the WASA-at-COSY facility
Skurzok, M.
Krzemien, W.
Moskal, P.
MESON 2014 - 13TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS, 2014, 81
[2] SEARCH FOR THE MANIFESTATION OF THE MESIC NUCLEI ON THE dd → 3HeNπ EXCITATION FUNCTION MEASURED WITH WASA-at-COSY
Krzemien, Wojciech
Moskal, P.
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ACTA PHYSICA POLONICA B, 2014, 45 (03): : 689 - 695
[3] Search for η-Mesic 4He with WASA-at-COSY
Krzemien, W.
Moskal, P.
Skurzok, M.
FEW-BODY SYSTEMS, 2014, 55 (8-10) : 795 - 799
[4] UPPER LIMITS FOR THE PRODUCTION OF THE η-MESIC HELIUM IN THE dd → 3Hepπ0 AND dd → 3Hepπ- REACTIONS
Skurzok, Magdalena
Krzemien, Wojciech
Rundel, Oleksandr
Moskal, Pawel
ACTA PHYSICA POLONICA B, 2016, 47 (02): : 503 - 508
[5] Search for the η-mesic 4He with WASA-at-COSY
Krzemien, W.
Moskal, P.
Smyrski, J.
Skurzok, M.
INPC 2013 - INTERNATIONAL NUCLEAR PHYSICS CONFERENCE, VOL. 2, 2014, 66
[6] Search for η-mesic 4He with the WASA-at-COSY detector
Adlarson, P.
Augustyniak, W.
Bardan, W.
Bashkanov, M.
Bednarski, T.
Bergmann, F. S.
Berlowski, M.
Bhatt, H.
Buescher, M.
Calen, H.
Clement, H.
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Czerwinski, E.
Demmich, K.
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Engels, R.
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Foehl, K.
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PHYSICAL REVIEW C, 2013, 87 (03):
[7] Search for the η mesic 3He in the pd → dpπ0 reaction with the WASA-at-COSY facility
Adlarson, P.
Augustyniak, W.
Bashkanov, M.
Bass, S. D.
Bergmann, F. S.
Berlowski, M.
Bondar, A.
Buescher, M.
Calen, H.
Ciepal, I
Clement, H.
Czerwinski, E.
Demmich, K.
Engels, R.
Erven, A.
Erven, W.
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Foehl, K.
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Goswami, A.
Grigoryev, K.
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Hejny, V
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Khoukaz, A.
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Kistryn, S.
Kleines, H.
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Krzemien, W.
Kulessa, P.
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Lalwani, K.
Lersch, D.
Lorentz, B.
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Marciniewski, P.
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Moskal, P.
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PHYSICAL REVIEW C, 2020, 102 (04)
[8] Search for η mesic 3He with the WASA-at-COSY facility in the pd → 3He2γ and pd → 3He6γ reaction
Adlarson, P.
Augustyniak, W.
Bardan, W.
Bashkanov, M.
Bass, S. D.
Berlowski, M.
Bondar, A.
Buescher, M.
Calen, H.
Ciepal, I.
Clement, H.
Czerwinski, E.
Engels, R.
Erven, A.
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Fedorets, P.
Foehl, K.
Fransson, K.
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Goswami, A.
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Hejny, V.
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PHYSICS LETTERS B, 2020, 802
[9] ANALYSIS OF THE pd → pdπ0 REACTION MEASURED WITH WASA-at-COSY FACILITY IN ORDER TO SEARCH FOR η-MESIC HELIUM
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