Detection of π+π- atoms with the DIRAC spectrometer at CERN

被引：21

作者：

Adeva, B ^{[1
]}

Afanasyev, L

Benayoun, M

Benelli, A

Berka, Z

Brekhovskikh, V

Caragheorgheopol, G

Cechak, T

Chiba, M

Constantinescu, S

Costantini, S

Detraz, C

Dreossi, D

Drijard, D

Dudarev, A

Evangelou, I

Ferro-Luzzi, M

Gallas, MV

Gerndt, J

Giacomich, R

Gianotti, P

Goldin, D

Gómez, F

Gorin, A

Gorchakov, O

Guaraldo, C

Hansroul, M

Hosek, R

Iliescu, M

Kalinina, N

Karpukhin, V

Kluson, J

Kobayashi, M

Kokkas, P

Komarov, V

Kruglov, V

Kruglova, L

Kulikov, A

Kuptsov, A

Kurochkin, I

Kuroda, KI

Lamberto, A

Lanaro, A

Lapshin, V

Lednicky, R

Leruste, P

Sandri, PL

Aguera, AL

Lucherini, V

Maki, T

机构：

[1] Univ Santiago de Compostela, Santiago De Compostela, Spain

[2] JINR, Dubna, Russia

[3] Univ Paris 06, LPNHE, CNRS, IN2P3, F-75252 Paris 05, France

[4] Univ Paris 07, LPNHE, CNRS, Paris, France

[5] Univ Basel, Basel, Switzerland

[6] Czech Tech Univ, CR-16635 Prague, Czech Republic

[7] IHEP, Protvino, Russia

[8] Natl Inst Phys & Nucl Engn, IFINHH, Bucharest, Romania

[9] Tokyo Metropolitan Univ, Tokyo 158, Japan

[10] CERN, Geneva, Switzerland

[11] INFN Trieste, Trieste, Italy

[12] Univ Trieste, Trieste, Italy

[13] Univ Ioannina, GR-45110 Ioannina, Greece

[14] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[15] Moscow MV Lomonosov State Univ, Skobelstein Inst Nucl Phys, Moscow, Russia

[16] Natl Lab High Energy Phys, KEK, Tsukuba, Ibaraki 305, Japan

[17] ACSR, Inst Phys, Prague, Czech Republic

[18] Kyoto Sangyo Univ, Kyoto 603, Japan

[19] Univ Bern, Bern, Switzerland

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2004年 / 30卷 / 12期

关键词：

D O I：

10.1088/0954-3899/30/12/012

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 goal of the DIRAC experiment at CERN is to measure with high precision the lifetime of the pi(+)pi(-) atom (A(2pi)), which is of order 3 x 10(-15) s, and thus to determine the s-wave pipi-scattering lengths difference \a(0) - a(2)\. A(2pi) atoms are detected through the characteristic features of pi(+)pi(-) pairs from the atom break-up (ionization) in the target. We report on a first high statistics atomic data sample obtained from p-Ni interactions at 24 GeV/c proton momentum and present the methods to separate the signal from the background.

引用

页码：1929 / 1946

页数：18

共 27 条

[1] DIRAC:: A high resolution spectrometer for pionium detection [J].

Adeva, B ;

Afanasyev, L ;

Benayoun, M ;

Benelli, A ;

Berka, Z ;

Brekhovskikh, V ;

Caragheorgheopol, G ;

Cechak, T ;

Chiba, M ;

Cima, E ;

Constantinescu, S ;

Detraz, C ;

Dreossi, D ;

Drijard, D ;

Dudarev, A ;

Evangelou, I ;

Ferro-Luzzi, M ;

Gallas, MV ;

Gerndt, J ;

Giacomich, R ;

Gianotti, P ;

Giardoni, M ;

Goldin, D ;

Gómez, F ;

Gorin, A ;

Gortchakov, O ;

Guaraldo, C ;

Hansroul, M ;

Iliescu, M ;

Zhabitsky, M ;

Karpukhin, V ;

Kluson, J ;

Kobayashi, M ;

Kokkas, P ;

Komarov, V ;

Kruglov, V ;

Kruglova, L ;

Kulikov, A ;

Kuptsov, A ;

Kurochkin, V ;

Kuroda, KI ;

Lamberto, A ;

Lanaro, A ;

Lapshin, V ;

Lednicky, R ;

Leruste, P ;

Levisandri, P ;

Aguera, AL ;

Lucherini, V ;

Maki, T .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 515 (03) :467-496

[2] The multilevel trigger system of the DIRAC experiment [J].

Afanasyev, L ;

Gallas, M ;

Goldin, D ;

Gorin, A ;

Karpukhin, V ;

Kokkas, P ;

Kulikov, A ;

Kuroda, K ;

Manuilov, I ;

Okada, K ;

Schuetz, C ;

Sidorov, A ;

Steinacher, M ;

Takeutchi, F ;

Tauscher, L ;

Vlachos, S ;

Yazkov, V .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2002, 491 (03) :376-389

[3] First level trigger of the DIRAC experiment [J].

Afanasyev, L ;

Gallas, M ;

Karpukhin, V ;

Kulikov, A .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2002, 479 (2-3) :407-411

[4]

Afanasyev L. G., 1996, YAD FIZ, V59, P2212

[5] EXPERIMENTAL ESTIMATION OF THE LIFETIME OF ATOMS FORMED BY PI(+) AND PI(-) MESONS [J].

AFANASYEV, LG ;

CHVYROV, AS ;

GORCHAKOV, OE ;

KARPUKHIN, VV ;

KOLOMYICHENKO, AV ;

KOMAROV, VI ;

KRUGLOV, VV ;

KUPTSOV, AV ;

NEMENOV, LL ;

NIKITIN, MV ;

PUSTYLNIK, ZP ;

KULIKOV, AV ;

TRUSOV, SV ;

YAZKOV, VV .

PHYSICS LETTERS B, 1994, 338 (04) :478-482

[6] OBSERVATION OF ATOMS CONSISTING OF PI(+) AND PI(-) MESONS [J].

AFANASYEV, LG ;

CHVYROV, AS ;

GORCHAKOV, OE ;

IVANOV, MA ;

KARPUKHIN, VV ;

KOLOMYICHENKO, AV ;

KOMAROV, VI ;

KRUGLOV, VV ;

KUPTSOV, AV ;

NEMENOV, LL ;

NIKITIN, MV ;

PUSTYLNIK, ZP ;

KULIKOV, AV ;

TRUSOV, SV ;

YAZKOV, VV ;

MKRTCHYAN, GG ;

KUROV, AP .

PHYSICS LETTERS B, 1993, 308 (1-2) :200-206

[7]

Afanasyev LG, 1996, PHYS ATOM NUCL+, V59, P2130

[8]

BILENKII SM, 1970, SOV J NUCL PHYS+, V10, P469

[9] ππ scattering [J].

Colangelo, G ;

Gasser, J ;

Leutwyler, H .

NUCLEAR PHYSICS B, 2001, 603 (1-2) :125-179

[10] INTERACTION OF RELATIVISTIC ELEMENTARY ATOMS WITH MATTER .2. NUMERICAL RESULTS [J].

DENISENKO, KG ;

MROWCZYNSKI, S .

PHYSICAL REVIEW D, 1987, 36 (05) :1529-1537

← 1 2 3 →