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1. Dirac experiment

Author

Gómez, F., Adeva, B., Afanasev, L., Benayoun, M., Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Constantinescu, S., Doudarev, A., Dreossi, D., Drijard, D., Ferro-Luzzi, M., Gallas, M.V., Gerndt, J., Giacomich, R., Gianotti, P., Goldin, D., Gorin, A., Gortchakov, O., Guaraldo, C., Hansroul, M., Hosek, R., Iliescu, M., Jabitski, M., Kalinina, N., Karpoukhine, V., Kluson, J., Kobayashi, M., Kokkas, P., Komarov, V., Koulikov, A., Kouptsov, A., Krouglov, V., Krouglova, L., Kuroda, K.-I., Lanaro, A., Lapshine, V., Lednicky, R., Leruste, P., Levisandri, P., Lopez Aguera, A., Lucherini, V., Maki, T., Manuilov, I., Montanet, L., Narjoux, J.-L., Nemenov, L., Nikitin, M., Nunez Pardo, T., Okada, K., Olchevskii, V., Pazos, A., Pentia, M., Penzo, A., Perreau, J.-M., Petrascu, C., Plo, M., Ponta, T., Pop, D., Riazantsev, A., Rodriguez, J.M., Rodriguez Fernandez, A., Rykaline, V., Santamarina, C., Saborido, J., Schacher, J., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Tobar, M.J., Trusov, S., Vazquez, P., Vlachos, S., Yazkov, V., Yoshimura, Y., and Zrelov, P.

Published
2001
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2. Dirac experiment

Author

F. Gómez, B. Adeva, L. Afanasev, M. Benayoun, V. Brekhovskikh, G. Caragheorgheopol, T. Cechak, M. Chiba, S. Constantinescu, A. Doudarev, D. Dreossi, D. Drijard, M. Ferro-Luzzi, M.V. Gallas, J. Gerndt, R. Giacomich, P. Gianotti, D. Goldin, A. Gorin, O. Gortchakov, C. Guaraldo, M. Hansroul, R. Hosek, M. Iliescu, M. Jabitski, N. Kalinina, V. Karpoukhine, J. Kluson, M. Kobayashi, P. Kokkas, V. Komarov, A. Koulikov, A. Kouptsov, V. Krouglov, L. Krouglova, K.-I. Kuroda, A. Lanaro, V. Lapshine, R. Lednicky, P. Leruste, P. Levisandri, A. Lopez Aguera, V. Lucherini, T. Maki, I. Manuilov, L. Montanet, J.-L. Narjoux, L. Nemenov, M. Nikitin, T. Nunez Pardo, K. Okada, V. Olchevskii, A. Pazos, M. Pentia, A. Penzo, J.-M. Perreau, C. Petrascu, M. Plo, T. Ponta, D. Pop, A. Riazantsev, J.M. Rodriguez, A. Rodriguez Fernandez, V. Rykaline, C. Santamarina, J. Saborido, J. Schacher, A. Sidorov, J. Smolik, F. Takeutchi, A. Tarasov, L. Tauscher, M.J. Tobar, S. Trusov, P. Vazquez, S. Vlachos, V. Yazkov, Y. Yoshimura, and P. Zrelov

Subjects
Nuclear and High Energy Physics, Atomic and Molecular Physics, and Optics
Published
2001
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3. Detection of atoms consisting of π+ and π− mesons at PS CERN

Author

L. Afanasyev, L. Montanet, M. Benayoun, V. Lucherini, T. Nunez Pardo, Tomáš Čechák, M. Hansroul, P. Zrelov, A. Riazantsev, T. Gallas Torreira, M. Iliescu, F. Gomez, V.I. Rykalin, J. L. Narjoux, P. Vazquez, V. Krouglov, L. Nemenov, Panagiotis Kokkas, V.I. Komarov, T. Maki, Jose Manuel Rodriguez, C. Guaraldo, A. Kouptsov, Paola Gianotti, M. Ferro-Luzzi, O. Gortchakov, L. Tauscher, V. Lapshin, J. Gerndt, A. Lopez Agüera, Armando Lanaro, J. Smolik, B. Adeva, V. Brekhovskikh, R. Lednicky, S. Trousov, S. Constantini, M.J. Tobar, Y. Yoshimura, A. Sidorov, J. Schacher, M. Nikitin, S. Vlachos, Masami Chiba, M. Pentia, G.F. Rappazzo, A. Rodriguez Fernandez, P. Levi Sandri, Ph Leruste, A. Koulikov, Z. Berka, I. Manuilov, M. Plo, G. Caragheorgheopol, V. Karpukhin, J.J. Saborido, K. I. Kuroda, A. Doudarev, J. Kluson, C. Schuetz, N. Kalinina, R. Hosek, V. Olchevskii, M. Jabitski, V. Yazkov, D. Dreossi, Makoto Kobayashi, C. Petrascu, S. Constantinescu, T. Ponta, A. Gorin, Fujio Takeutchi, K. Okada, R. Giacomich, D. Pop, A. Tarasov, C. Santamarina, L. Krouglova, A. Penzo, A. Lamberto, J.M. Perreau, D. Drijard, and A. Pazos

Subjects
Quantum chromodynamics, Nuclear physics, Physics, Particle physics, Pion, Chiral perturbation theory, Meson, Proton, High Energy Physics::Lattice, Hadron, Proton Synchrotron, Nuclear Experiment, Chiral symmetry breaking
Abstract

The DIRAC experiment aims to measure the lifetime of π+π− atoms in the ground state with 10% precision, using the 24 GeV/c proton beam of the CERN Proton Synchrotron. As the value of the above lifetime of order 10−15s is dictated by a strong interaction at low energy, the precise measurement of this quantity enables to determine a combination of S‐wave pion scattering lengths to 5%. Pion scattering lengths have been calculated in the framework of chiral perturbation theory with high precision. Thus the accurate measurement of these values would submit the understanding of chiral symmetry breaking of QCD to a crucial test. Some preliminary results from the analysis of a 2000 data sample are presented.

Published
2002
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4. First observation of $\pi$K atom and its lifetime measurement

Author

Adeva, B, Afanasiev, L G, Berka, Z, Brekhovskikh, V, Caragheorgheopol, G, Cechák, T, Chiba, M, Costantini, S, Constantinescu, S, Détraz, C, Doudarev, A, Drijard, Daniel, Evangelou, I, Ferro-Luzzi, M, Gallas-Torreira, M V, Gerndt, J, Giacomich, R, Gianotti, P, Giardoni, M, Goldin, D, Gómez, F, Gorin, A, Gortchakov, O E, Guaraldo, C, Hansroul, M, Hosek, R, Iliescu, M A, Jabitski, M, Kalinina, N A, Karpoukhine, V, Kluson, J, Kobayashi, M, Kokkas, P, Komarov, V, Koulikov, A, Kouptsov, A, Krouglov, V, Krouglova, L, Kuroda, K I, Lamberto, A, Lanaro, A, Lapshin, V G, Lednicky, R, Levi-Sandri, P, López-Aguera, A, Lucherini, V, Mäki, T, Manuilov, I V, Manthos, N, Medinsky, M, Montanet, Lucien, Nemenov, L L, Nikitin, M, Okada, K, Olchevskii, V, Pentia, M, Penzo, Aldo L, Petrascu, C, Pló, M, Pop, D, Pustylnik, Z P, Rappazzo, G F, Riazantsev, A, Rodríguez, X M, Rodríguez-Fernández, A M, Rykalin, V I, Santamarina-Rios, C, Saborido, J, Schacher, J, Schütz, C, Sidorov, A, Smolik, J, Takeutchi, F, Tarasov, A, Tauscher, Ludwig, Tobar, M J, Triantis, F A, Trousov, S, Vlachos, S, Yazkov, V V, Yoshimura, Y, Zrelov, V P, and Ponta, T

Subjects
Detectors and Experimental Techniques
Published
2000

5. DI-MESON LIFETIME MEASUREMENT WITH DIRAC

Author

ADEVA, B., primary, AFANASYEV, L., additional, BENAYOUN, M., additional, BERKA, Z., additional, BENELLI, A., additional, BREKHOVSKIKH, V., additional, CARAGHEORGHEOPOL, G., additional, CECHAK, T., additional, CHIBA, M., additional, CONSTANTINI, S., additional, CONSTANTINESCU, S., additional, DOUDAREV, A., additional, DRIJARD, D., additional, EVANGELOU, I., additional, FERRO-LUZZI, M., additional, TORREIRA, M. V. GALLAS, additional, GERNDT, J., additional, GIACOMICH, R., additional, GIANOTTI, P., additional, GOLDIN, D., additional, GOMEZ, F., additional, GORIN, A., additional, GORTCHAKOV, O., additional, GUARALDO, C., additional, HANSROUL, M., additional, HOSEK, R., additional, ILIESCU, M., additional, JABITSKI, M., additional, KALININA, N., additional, KARPOUKHINE, V., additional, KLUSON, J., additional, KOBAYASHI, M., additional, KOKKAS, P., additional, KOMAROV, V., additional, KOULIKOV, A., additional, KOUPTSOV, A., additional, KROUGLOV, V., additional, KROUGLOVA, L., additional, KURODA, K.-I., additional, LAMBERTO, A., additional, LANARO, A., additional, LAPSHIN, V., additional, LEDNICKY, R., additional, LERUSTE, P., additional, SANDRI, P. LEVI, additional, AGUERA, A. LOPEZ, additional, LUCHERINI, V., additional, MAKI, T., additional, MANUILOV, I., additional, MANTHOS, N., additional, MONTANET, L., additional, NARJOUX, J.-L., additional, NEMENOV, L., additional, NIKITIN, M., additional, PARDO, T. NUNEZ, additional, OKADA, K., additional, OLCHEVSKII, V., additional, PENTIA, M., additional, PENZO, A., additional, PERREAU, J.-M., additional, PETRASCU, C., additional, PLO, M., additional, PONTA, T., additional, POP, D., additional, RAPPAZZO, G. F., additional, RIAZANTSEV, A., additional, RODRIGUEZ, J. M., additional, FERNANDEZ, A. RODRIGUEZ, additional, RYKALIN, V., additional, SANTAMARINA, C., additional, SABORIDO, J., additional, SCHACHER, J., additional, SCHUETZ, C., additional, SIDOROV, A., additional, SMOLIK, J., additional, TAKEUTCHI, F., additional, TARASOV, A., additional, TAUSCHER, L., additional, TOBAR, M. J., additional, TRIANTIS, F., additional, TROUSOV, S., additional, VAZQUAZ, P., additional, VLACHOS, S., additional, YAZKOV, V., additional, YOSHIMURA, Y., additional, and ZRELOV, P., additional

Published
2003
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7. Detection of atoms consisting of π+ and π- mesons at PS CERN.

Author

Afanasyev, L., Adeva, B., Benayoun, M., Berka, Z., Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Constantini, S., Constantinescu, S., Doudarev, A., Dreossi, D., Drijard, D., Ferro-Luzzi, M., Torreira, T. Gallas, Gerndt, J., Giacomich, R., Gianotti, P., Gomez, F., and Gorin, A.

Subjects
PROTON beams, PIONS -- Scattering
Abstract

The DIRAC experiment aims to measure the lifetime of π[sup +]π[sup -] atoms in the ground state with 10% precision, using the 24 GeV/c proton beam of the CERN Proton Synchrotron. As the value of the above lifetime of order 10[sup -15]s is dictated by a strong interaction at low energy, the precise measurement of this quantity enables to determine a combination of S-wave pion scattering lengths to 5%. Pion scattering lengths have been calculated in the framework of chiral perturbation theory with high precision. Thus the accurate measurement of these values would submit the understanding of chiral symmetry breaking of QCD to a crucial test. Some preliminary results from the analysis of a 2000 data sample are presented. [ABSTRACT FROM AUTHOR]

Published
2002

8. DIRAC EXPERIMENT AND TEST OF LOW-ENERGY QCD.

Author

PENTIA, M., ADEVA, B., AFANASEV, L., BENAYOUN, M., BREKHOVSKIKH, V., CARAGHEORGHEOPOL, G., CECHAK, T., CHIBA, M., CONSTANTINESCU, S., DOUDAREV, A., DREOSSI, D., DRIJARD, D., FERRO-LUZZI, M., TORREIRA, T. GALLAS, GERNDT, J., GIACOMICH, R., GIANOTTI, P., GOMEZ, F., GORIN, A., and GORTCHAKOV, O.

Subjects
DIRAC function, NUCLEAR physics experiments, QUANTUM chromodynamics, NUCLEAR energy, COULOMB functions
Published
2000

9. Human plasma levels of POPs, and diet among native people from Uelen, Chukotka

Author

Torkjel M. Sandanger, Ivan C. Burkow, Jon Øyvind Odland, Georgy I. Miretsky, Eiliv Lund, Alexey A. Doudarev, Valery Chaschin, and Magritt Brustad

Subjects
Adult, Male, Insecticides, Seals, Earless, Food Contamination, Management, Monitoring, Policy and Law, DDT, Russia, Animal science, Pregnancy, biology.animal, Blubber, Ethnicity, Animals, Humans, Organic Chemicals, Aged, East coast, biology, Whale, Age Factors, Whales, Public Health, Environmental and Occupational Health, General Medicine, Plasma levels, Middle Aged, Polychlorinated Biphenyls, Diet, Breast Feeding, Human plasma, Environmental chemistry, Plasma concentration, Environmental Pollutants, Female, Walruses, Geometric mean, Breast feeding
Abstract

Some of the people living in the Chukotka Peninsula of Russia depend heavily on marine mammals, but little is known of the exact dietary patterns and plasma levels of POPs among these populations. In this study, POPs levels in plasma from 50 participants from the isolated community of Uelen (Bering Strait) were determined and related to dietary information obtained through a food frequency questionnaire. The intake of marine mammals was high and the combined intake of blubber from walrus, seal and whale was a significant predictor (p0.01) of plasma concentrations of sum PCBs and borderline for sum CDs (p = 0.02) and sum DDTs (p = 0.04). There was a significant gender difference in the levels of POPs, and among women there was a significant increase with age. Extensive breastfeeding and lower blubber intake among women could be possible explanations for this gender difference. Despite the high intake of blubber the plasma levels of PCBs and DDTs were lower than some of those reported for the East Coast of Greenland. The geometric mean values for sum PCBs (17 congeners) and sum DDTs were 1316 ng g(-1) lipids and 563 ng g(-1) lipids, respectively. PCB 163, which partly co-eluted with PCB 138, was found in high concentrations (40% of PCB 138). This raises questions regarding the validity of using PCB 138 and PCB 153 to calculate the level of Arochlor 1260. The geometric mean of sum CDs was 518 ng g(-1) lipids. Concentrations of beta-HCH (geometric mean; 410 ng g(-1) lipids) were higher than observed for other native populations depending on marine mammals. Transportation of beta-HCH by ocean currents through the Bering Strait into the Arctic Ocean or regional point sources might explain these elevated levels.

Published
2003
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10. Di-meson lifetime measurement with DIRAC

Author

M. Plo, A. Doudarev, C. Schuetz, A. Lamberto, A. Koulikov, Fujio Takeutchi, Ioannis Evangelou, Nikolaos Manthos, R. Lednicky, J. Schacher, I. Manuilov, C. Santamarina, A. Benelli, L. Krouglova, K. I. Kuroda, P. Vazquaz, V.I. Komarov, L. Montanet, J. Kluson, D. Goldin, N. Kalinina, T. Maki, Jose Manuel Rodriguez, J.J. Saborido, P. Levi Sandri, A. Tarasov, M. Iliescu, S. Vlachos, V. Lucherini, Makoto Kobayashi, Armando Lanaro, T. Nunez Pardo, Z. Berka, F. Gomez, O. Gortchakov, S. Trousov, T. Ponta, S. Constantini, A. Penzo, G. Caragheorgheopol, Tomáš Čechák, M. Nikitin, V. Lapshin, Y. Yoshimura, L. Tauscher, A. Sidorov, P. Zrelov, K. Okada, R. Giacomich, J. Smolik, M. Hansroul, M. Jabitski, Masami Chiba, V.I. Rykalin, Paola Gianotti, D. Pop, M. Ferro-Luzzi, M. Benayoun, Panagiotis Kokkas, L. Nemenov, C. Petrascu, S. Constantinescu, M. Pentia, L. Afanasyev, A. Lopez Agüera, A. Gorin, V. Brekhovskikh, V. Karpoukhine, A. Riazantsev, B. Adeva, A. Rodriguez Fernandez, V. Krouglov, C. Guaraldo, F. Triantis, G.F. Rappazzo, Ph Leruste, R. Hosek, J. L. Narjoux, A. Kouptsov, V. Olchevskii, M. Gallas Torreira, V. Yazkov, J. Gerndt, M.J. Tobar, J.M. Perreau, and D. Drijard

Subjects
Physics, Particle physics, Meson, Dirac (software)

11. Detection of atoms consisting of pi(+) and pi(-) mesons at PSCERN

Author

Afanasyev, L., Adeva, B., Benayoun, M., Berka, Z., Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Constantini, S., Constantinescu, S., Doudarev, A., Dreossi, D., Drijard, D., Ferro-Luzzi, M., Torreira, Tg, Gerndt, J., Giacomich, R., Gianotti, P., Gomez, F., Gorin, A., Gortchakov, O., Guaraldo, C., Hansroul, M., Hosek, R., Iliescu, M., Jabitski, M., Kalinina, N., Karpukhin, V., Kluson, J., Kobayashi, M., Kokkas, P., Komarov, V., Koulikov, A., Kouptsov, A., Krouglov, V., Krouglova, L., Kuroda, Ki, Lamberto, A., Lanaro, A., Lapshin, V., Richard Lednicky, Leruste, P., Sandri, Pl, Aguera, Al, Lucherini, V., Maki, T., Manuilov, I., Montanet, L., Narjoux, Jl, Nemenov, L., Nikitin, M., Pardo, Tn, Okada, K., Olchevskii, V., Pazos, A., Pentia, M., Penzo, A., Perreau, Jm, Petrascu, C., Plo, M., Ponta, T., Pop, D., Rappazzo, Gf, Riazantsev, A., Rodriguez, Jm, Fernandez, Ar, Rykalin, V., Santamarina, C., Saborido, J., Schacher, J., Schuetz, C., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Tobar, Mj, Trousov, S., Vazquez, P., Vlachos, S., Yazkov, V., Yoshimura, Y., and Zrelov, P.

12. Test of chiral perturbation theory with DIRAC at CERN

Author

Gianotti, P., Adeva, B., Afanasev, L., Benayoun, Maurice, Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Constantinescu, S., Doudarev, A., Dreossi, D., Drijard, D., Ferro-Luzzi, M., Gallas Torreira, M., Gerndt, J., Giacomich, R., Gomez, 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., Kulikov, A., Kuptsov, A., Kruglov, V., Kruglova, L., Kuroda, K. I., Lanaro, A., Lapshin, V., Richard Lednicky, Leruste, P., Levi Sandri, P., Lopez Aguera, A., Lucherini, V., Maki, T., Manuilov, I., Montanet, L., Narjoux, J. L., Nemenov, L., Nikitin, M., Nunez Pardo, T., Okada, K., Olchevsky, V., Pazos, A., Pentia, M., Penzo, A., Perreau, J. M., Petrascu, C., Plo, M., Ponta, T., Pop, D., Ryazantsev, A., Rodriguez, J. M., Rodriguez Fernandez, A., Rykalin, V., Santamarina, C., Schacher, J., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Trusov, Sergey V., Vazquez, P., Vlachos, S., Yazkov, V., Yoshimura, Y., and Zrelov, P.

13. DIRAC experiment and test of low-energy QCD

Author

Pentia, M., Adeva, B., Afanasev, L., Benayoun, Maurice, Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Constantinescu, S., Doudarev, A., Dreossi, D., Drijard, D., Ferro-Luzzi, M., Gallas Torreira, T., Gerndt, J., Giacomich, R., Gianotti, P., Gomez, F., Gorin, A., Gortchakov, O., Guaraldo, C., Hansroul, M., Hosek, R., Iliescu, M., Kalinina, N., Karpoukhine, V., Kluson, J., Kobayashi, M., Kokkas, P., Komarov, V., Koulikov, A., Kouptsov, A., Krouglov, V., Krouglova, L., Kuroda, K. I., Lanaro, A., Lapshine, V., Richard Lednicky, Leruste, P., Levi Sandri, P., Lopez Aguera, A., Lucherini, V., Maki, T., Manuilov, I., Montanet, L., Narjoux, J. L., Nemenov, L., Nikitin, M., Nunez Pardo, T., Okada, K., Olchevsky, V., Pazos, A., Penti, M., Penzo, A., Perreau, J. M., Petrascu, C., Plo, M., Ponta, T., Pop, D., Riazantsev, A., Rodriguez, J. M., Rodriguez Fernandez, A., Rykaline, V., Santamarina, C., Schacher, J., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Trusov, Sergey V., Vazquez, P., Vlachos, S., Yazkov, V., Yoshimura, Y., and Zrelov, P.

Subjects
Particle Physics - Phenomenology
Abstract

The low-energy QCD predictions to be tested by the DIRAC experiment are revised. The experimental method, the setup characteristics and capabilities, along with first experimental results are reported. Preliminary analysis shows good detector performance: alignment error via $\Lambda$ mass measurement $m_\Lambda = 1115.6 MeV/c^2$ with $\sigma = 0.92 MeV/c^2$, $p \pi^-$ relative momentum resolution $\sigma_Q \approx 2.7 MeV/c$, and evidence for $\pi^+ The low-energy QCD predictions to be tested by the DIRAC experiment are revised. The experimental method, the setup characteristics and capabilities, along with first experimental results are reported. Preliminary analysis shows good detector performance: alignment error via $\Lambda$ mass measurement $m_\Lambda = 1115.6 MeV/c^2$ with $\sigma = 0.92 MeV/c^2$, $p \pi^-$ relative momentum resolution $\sigma_Q \approx 2.7 MeV/c$, and evidence for $\pi^+ \pi^-$ low momentum Coulomb correlation.

14. The DIRAC experiment at CERN: Current status and future perspectives

Author

Rodriguez Fernandez, A. M., Adeva, B., Afanasev, L., Benayoun, M., Berka, Z., Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Costantini, S., Constantinescu, S., Doudarev, A., Dreossi, D., Drijard, D., Ferro-Luzzi, M., Gallas, M. V., Gerndt, J., Giacomich, R., Gianotti, P., Goldin, D., Gorin, A., Gorchakov, O., Guaraldo, C., Hansroul, M., Hosek, R., Iliescu, M., Zhabitsky, M., Kalinina, N., Karpukhin, V., Kluson, J., Kobayashi, M., Kokkas, P., Komarov, V., Kulikov, A., Kuptsov, A., Kruglov, V., Kruglova, L., Kuroda, K. I., Lamberto, A., Lanaro, A., Lapshin, V., Richard Lednicky, Leruste, P., Levi Sandri, P., Lopez Aguera, A., Lucherini, V., Maki, T., Manuilov, I., Montanet, L., Narjoux, J. L., Nemenov, L., Nikitin, M., Nunez Pardo, T., Okada, K., Olchevsky, V., Pazos, A., Pentia, M., Penzo, A., Perreau, J. M., Petrascu, C., Plo, M., Ponta, T., Pop, D., Rapazzo, G. F., Ryazantsev, A., Rodriguez, J. M., Rodriguez Fernandez, A., Rykalin, V., Santamarina, C., Saborido, J., Schacher, J., Schutz, C., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Tobar, M. J., Trusov, Sergey V., Vazquez, P., Vlachos, S., Yazkov, V., Yoshimura, Y., and Zrelov, P.

15. Lifetime measurement of pi+ pi- and pi+- K-+ atoms to test low energy QCD. Addendum to the DIRAC proposal

Author

Adeva, B., Afanasev, L., Berka, Z., Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Constantinescu, S., Detraz, C. C., Doudarev, A., Drijard, D., Evangelou, I., Gallas, M. V., Gerndt, J., Giacomich, R., Gianotti, P., Giardoni, M., Gomez, F., Gorin, A., Gorchakov, O., Guaraldo, C., Hansroul, M., Hosek, R., Iliescu, M., Karpukhin, V., Kluson, J., Kobayashi, M., Kokkas, P., Komarov, V., Kulikov, A., Kuptsov, A., Kruglov, V., Kruglova, L., Kuroda, K. I., Lamberto, A., Lanaro, A., Lapshin, V., Richard Lednicky, Levi Sandri, P., Lucherini, V., Manthos, N., Nemenov, L., Nikitin, M., Okada, K., Olshevsky, V., Penescu, L., Pentia, M., Penzo, A., Petrascu, C., Plo, M., Pustylnik, Zh, Rappazzo, G. F., Ryazantsev, A., Romero, A., Rykalin, V., Santamarina, C., Saborido, J., Schacher, J., Schuetz, C., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Triantis, F., Trusov, Sergey V., Vazquez Doce, O., Vazquez, P., Vlachos, S., Yazkov, V., Yoshimura, Y., Zhabitsky, M., and Zrelov, P.

16. Detection of pionium with DIRAC

Author

Lanaro, A., Adeva, B., Afanasev, L., Benayoun, Maurice, Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Constantinescu, S., Doudarev, A., Dreossi, D., Drijard, D., Ferro-Luzzi, M., Gallas Torreira, T., Gerndt, J., Giacomich, R., Gianotti, P., Gomez, F., Gorin, A., Gortchakov, O., Guaraldo, C., Hansroul, M., Hosek, R., Iliescu, M., Kalinina, N., Karpoukhine, V., Kluson, J., Kobayashi, M., Kokkas, P., Komarov, V., Koulikov, A., Kouptsov, A., Krouglov, V., Krouglova, L., Kuroda, K. I., Lapshine, V., Richard Lednicky, Leruste, P., Levi Sandri, P., Lopez Aguera, A., Lucherini, V., Maki, T., Manuilov, I., Montanet, L., Narjoux, J. L., Nemenov, L., Nikitin, M., Nunez Pardo, T., Okada, K., Olchevsky, V., Pazos, A., Pentia, M., Penzo, A., Perreau, J. M., Petrascu, C., Plo, M., Ponta, T., Pop, D., Riazantsev, A., Rodriguez, J. M., Rodriguez Fernandez, A., Rykaline, V., Santamarina, C., Schacher, J., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Trusov, Sergey V., Vazquez, P., Vlachos, S., Yazkov, V., Yoshimura, Y., and Zrelov, P.

Subjects
High Energy Physics::Lattice, High Energy Physics::Experiment, Detectors and Experimental Techniques, Nuclear Experiment
Abstract

The aim of the DIRAC experiment at CERN is to provide an accurate determination of S-wave pion-pion scattering lengths from the measurement of the lifetime of the pi+ pi- atom. The measurement will be done with precision comparable to the level of accuracy of theoretical predictions, formulated in the context of Chiral Perturbation Theory. Therefore, the understanding of chiral symmetry breaking of QCD will be submitted to a stringent test. The aim of the DIRAC experiment at CERN is to provide an accurate determination of S-wave pion-pion scattering lengths from the measurement of the lifetime of the pi+ pi- atom. The measurement will be done with precision comparable to the level of accuracy of theoretical predictions, formulated in the context of Chiral Perturbation Theory. Therefore, the understanding of chiral symmetry breaking of QCD will be submitted to a stringent test.

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