K-series X-ray yield measurement of kaonic hydrogen atoms in a gaseous target

被引：12

作者：

Bazzi, M. ^{[1
]}

Beer, G. ^{[2
]}

Bellotti, G. ^{[3
,4
]}

Berucci, C. ^{[1
,5
]}

Bragadireanu, A. M. ^{[1
,6
]}

Bosnar, D. ^{[7
]}

Cargnelli, M. ^{[5
]}

Curceanu, C. ^{[1
]}

Butt, A. D. ^{[3
,4
]}

d'Uffizi, A. ^{[1
]}

Fiorini, C. ^{[3
,4
]}

Ghio, F. ^{[8
,9
]}

Guaraldo, C. ^{[1
]}

Hayano, R. S. ^{[10
]}

Iliescu, M. ^{[1
]}

Ishiwatari, T. ^{[5
]}

Iwasaki, M. ^{[11
]}

Sandri, P. Levi ^{[1
]}

Marton, J. ^{[5
]}

Okada, S. ^{[11
]}

Pietreanu, D. ^{[1
,6
]}

Piscicchia, K. ^{[1
,12
]}

Romero Vidal, A. ^{[13
]}

Sbardella, E. ^{[1
]}

Scordo, A. ^{[1
]}

Shi, H. ^{[1
]}

Sirghi, D. L. ^{[1
,6
]}

Sirghi, F. ^{[1
,6
]}

Tatsuno, H. ^{[14
,15
]}

Doce, O. Vazquez ^{[16
]}

Widmann, E. ^{[5
]}

Zmeskal, J. ^{[5
]}

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Frascati, CP 13,Via E Fermi 40, I-00044 Rome, Italy

[2] Univ Victoria, Dept Phys & Astron, POB 3055, Victoria, BC V8W 3P6, Canada

[3] Politecn Milan, Dipartimento Elettron & Informaz, Piazza L da Vinci 3 2, I-20133 Milan, Italy

[4] Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy

[5] Stefan Meyer Inst Subatomare Phys, Boltzmanngasse 3, A-1090 Vienna, Austria

[6] Inst Natl Fiz & Ingn Nucl Horia Hulubbei, IFIN HH, Reactorului 30, Magurele, Romania

[7] Univ Zagreb, Fac Sci, Dept Phys, Bijenicka 32, HR-10000 Zagreb, Croatia

[8] Ist Nazl Fis Nucl, Sez Roma 1, I-00161 Rome, Italy

[9] Inst Super Sanita, I-00161 Rome, Italy

[10] Univ Tokyo, Dept Phys, Sch Sci, Bunkyo Ku, Hongo 7-3-1, Tokyo, Japan

[11] RIKEN, Inst Phys & Chem Res, 2-1 Hirosawa, Wako, Saitama 2510198, Japan

[12] Museo Stor Fisca & Ctr Studi & Ric Enrico Fermi, Piazza Viminale, I-00184 Rome, Italy

[13] Univ Santiago de Compostela, Casas Reais 8, Santiago De Compostela 15782, Spain

[14] NIST, Boulder, CO 80303 USA

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

[16] Tech Univ Munich, Excellence Cluster Universe, Boltzmannstr 2, D-85748 Garching, Germany

来源：

NUCLEAR PHYSICS A | 2016年 / 954卷

基金：

奥地利科学基金会;

关键词：

Kaonic atom; Kaonic hydrogen; Atomic cascade; X-ray spectroscopy; VACUUM POLARIZATION; CASCADE CALCULATION; EXCITED-STATES; SCATTERING; SIDDHARTA; DEUTERIUM;

D O I：

10.1016/j.nuclphysa.2016.03.047

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：

We measured the K-series X-rays of the K- p exotic atom in the SIDDHARTA experiment with a gaseous hydrogen target of 1.3 g/l, which is about 15 times the rho(STP) of hydrogen gas. At this density, the absolute yields of kaonic X-rays, when a negatively charged kaon stopped inside the target, were determined to be 0.012(-0.003)(+0.004) for all the K-alpha and 0.043(-0.011)(+0.012) for all the K-series transitions K-tot. These results, together with the KEK E228 experiment results, confirm for the first time a target density dependence of the yield predicted by the cascade models, and provide valuable information to refine the parameters used in the cascade models for the kaonic atoms. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：7 / 16

页数：10

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