Measuring the gravitational free-fall of antihydrogen

被引：4

作者：

Storey, J. ^{[1
]}

Aghion, S. ^{[2
,3
]}

Ahlen, O. ^{[4
]}

Amsler, C. ^{[1
]}

Ariga, A. ^{[1
]}

Ariga, T. ^{[1
]}

Belov, A. S. ^{[5
]}

Bonomi, G. ^{[6
,7
]}

Braeunig, P. ^{[8
]}

Bremer, J. ^{[4
]}

Brusa, R. S. ^{[9
,10
]}

Cabaret, L. ^{[11
]}

Canali, C. ^{[12
]}

Caravita, R. ^{[13
]}

Castelli, F. ^{[13
]}

Cerchiari, G. ^{[13
]}

Cialdi, S. ^{[13
]}

Comparat, D. ^{[11
]}

Consolati, G. ^{[2
,3
]}

Derking, J. H. ^{[4
]}

Di Domizio, S. ^{[14
]}

Di Noto, L. ^{[9
,10
]}

Doser, M. ^{[4
]}

Dudarev, A. ^{[4
]}

Ereditato, A. ^{[1
]}

Ferragut, R. ^{[2
,3
]}

Fontana, A. ^{[7
]}

Genova, P. ^{[7
]}

Giammarchi, M. ^{[3
]}

Gligorova, A. ^{[15
]}

Gninenko, S. N. ^{[5
]}

Haider, S. ^{[4
]}

Hogan, S. D. ^{[16
]}

Huse, T. ^{[17
]}

Jordan, E. ^{[18
]}

Jorgensen, L. V. ^{[4
]}

Kaltenbacher, T. ^{[4
]}

Kawada, J. ^{[1
]}

Kellerbauer, A. ^{[18
]}

Kimura, M. ^{[1
]}

Knecht, A. ^{[4
]}

Krasnicky, D. ^{[19
]}

Lagomarsino, V. ^{[19
]}

Lehner, S. ^{[21
]}

Malbrunot, C. ^{[21
]}

Mariazzi, S. ^{[9
,10
]}

Matveev, V. A. ^{[5
,20
]}

Merkt, F. ^{[22
]}

Moia, F. ^{[2
,3
]}

Nebbia, G. ^{[23
]}

机构：

[1] Univ Bern, Albert Einstein Ctr Fundamental Phys, High Energy Phys Lab, CH-3012 Bern, Switzerland

[2] Politecn Milan, I-20133 Milan, Italy

[3] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[4] CERN, European Org Nucl Res, Dept Phys, CH-1211 Geneva 23, Switzerland

[5] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[6] Univ Brescia, Dept Mech & Ind Engn, I-25133 Brescia, Italy

[7] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[8] Heidelberg Univ, Kirchhoff Inst Phys, D-69120 Heidelberg, Germany

[9] Univ Trento, Dipartimento Fis, I-38050 Povo, Trento, Italy

[10] Ist Nazl Fis Nucl, Grp Collegato Trento, I-38050 Povo, Trento, Italy

[11] Univ Paris 11, CNRS, Aime Cotton Lab, ENS Cachan, F-91405 Orsay, France

[12] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

[13] Univ Milan, Dept Phys, I-20133 Milan, Italy

[14] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[15] Univ Bergen, Inst Phys & Technol, N-5007 Bergen, Norway

[16] UCL, Dept Phys & Astron, London WC1E 6BT, England

[17] Univ Oslo, Dept Phys, N-0371 Oslo, Norway

[18] Max Planck Inst Nucl Phys, D-69117 Heidelberg, Germany

[19] Univ Genoa, Dept Phys, I-16146 Genoa, Italy

[20] Joint Inst Nucl Res, Dubna 141980, Russia

[21] Austrian Acad Sci, Stefan Meyer Inst Subat Phys, A-1090 Vienna, Austria

[22] ETH, Phys Chem Lab, CH-8093 Zurich, Switzerland

[23] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[24] Univ Lyon 1, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France

[25] Czech Tech Univ, FNSPE, Prague 11519 1, Czech Republic

[26] Univ Bologna, Dept Phys, I-40126 Bologna, Italy

[27] Univ Pavia, Dept Nucl & Theoret Phys, I-27100 Pavia, Italy

[28] Univ Naples Federico II, Dept Phys, I-80126 Naples, Italy

来源：

HYPERFINE INTERACTIONS | 2014年 / 228卷 / 1-3期

基金：

欧洲研究理事会;

关键词：

Antihydrogen; Gravity; AegIS; Emulsions;

D O I：

10.1007/s10751-014-1055-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Antihydrogen holds the promise to test, for the first time, the universality of free-fall with a system composed entirely of antiparticles. The AEgIS experiment at CERN's antiproton decelerator aims to measure the gravitational interaction between matter and antimatter by measuring the deflection of a beam of antihydrogen in the Earths gravitational field ((g) over bar). The principle of the experiment is as follows: cold antihydrogen atoms are synthesized in a Penning-Malberg trap and are Stark accelerated towards a moire deflectometer, the classical counterpart of an atom interferometer, and annihilate on a position sensitive detector. Crucial to the success of the experiment is the spatial precision of the position sensitive detector. We propose a novel free-fall detector based on a hybrid of two technologies: emulsion detectors, which have an intrinsic spatial resolution of 50 nm but no temporal information, and a silicon strip / scintillating fiber tracker to provide timing and positional information. In 2012 we tested emulsion films in vacuum with antiprotons from CERN's antiproton decelerator. The annihilation vertices could be observed directly on the emulsion surface using the microscope facility available at the University of Bern. The annihilation vertices were successfully reconstructed with a resolution of 1-2 mu mon the impact parameter. If such a precision can be realized in the final detector, Monte Carlo simulations suggest of order 500 antihydrogen annihilations will be sufficient to determine ($) over bar with a 1 % accuracy. This paper presents current research towards the development of this technology for use in the AEgIS apparatus and prospects for the realization of the final detector.

引用

页码：151 / 157

页数：7

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