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1. TALOS (Total Automation of LabVIEW Operations for Science): A framework for autonomous control systems for complex experiments

Author

Volponi, M., Zieliński, J., Rauschendorfer, T., Huck, S., Caravita, R., Auzins, M., Bergmann, B., Burian, P., Brusa, R. S., Camper, A., Castelli, F., Cerchiari, G., Ciuryło, R., Consolati, G., Doser, M., Eliaszuk, K., Giszczak, A., Glöggler, L. T., Graczykowski, Ł., Grosbart, M., Guatieri, F., Gusakova, N., Gustafsson, F., Haider, S., Janik, M. A., Januszek, T., Kasprowicz, G., Khatri, G., Kłosowski, Ł., Kornakov, G., Krumins, V., Lappo, L., Linek, A., Malamant, J., Mariazzi, S., Penasa, L., Petracek, V., Piwiński, M., Pospisil, S., Povolo, L., Prelz, F., Rangwala, S. A., Rawat, B. S., Rienäcker, B., Rodin, V., Røhne, O. M., Sandaker, H., Smolyanskiy, P., Sowiński, T., Tefelski, D., Vafeiadis, T., Welsch, C. P., Wolz, T., Zawada, M., and Zurlo, N.

Subjects
Physics - Instrumentation and Detectors, Physics - Atomic Physics
Abstract

Modern physics experiments are frequently very complex, relying on multiple simultaneous events to happen in order to obtain the desired result. The experiment control system plays a central role in orchestrating the measurement setup: However, its development is often treated as secondary with respect to the hardware, its importance becoming evident only during the operational phase. Therefore, the AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) collaboration has created a framework for easily coding control systems, specifically targeting atomic, quantum, and antimatter experiments. This framework, called Total Automation of LabVIEW Operations for Science (TALOS), unifies all the machines of the experiment in a single entity, thus enabling complex high-level decisions to be taken, and it is constituted by separate modules, called MicroServices, that run concurrently and asynchronously. This enhances the stability and reproducibility of the system while allowing for continuous integration and testing while the control system is running. The system demonstrated high stability and reproducibility, running completely unsupervised during the night and weekends of the data-taking campaigns. The results demonstrate the suitability of TALOS to manage an entire physics experiment in full autonomy: being open-source, experiments other than the AEgIS experiment can benefit from it.

Published
2024
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2. CIRCUS: an autonomous control system for antimatter, atomic and quantum physics experiments

Author

Volponi, Marco, Huck, Saiva, Caravita, Ruggero, Zielinski, Jakub, Kornakov, Georgy, Kasprowicz, Grzegorz, Nowicka, Dorota, Rauschendorfer, Tassilo, Rienäcker, Benjamin, Prelz, Francesco, Auzins, Marcis, Bergmann, Benedikt, Burian, Petr, Brusa, Roberto Sennen, Camper, Antoine, Castelli, Fabrizio, Ciuryło, Roman, Consolati, Giovanni, Doser, Michael, Glöggler, Lisa, Graczykowski, Łukasz, Grosbart, Malgorzata, Guatieri, Francesco, Gusakova, Nataly, Gustafsson, Fredrik, Haider, Stefan, Janik, Malgorzata, Khatri, Gunn, Kłosowski, Łukasz, Krumins, Valts, Lappo, Lidia, Linek, Adam, Malamant, Jan, Mariazzi, Sebastiano, Penasa, Luca, Petracek, Vojtech, Piwiński, Mariusz, Pospisil, Stanislav, Povolo, Luca, Rangwala, Sadiqali, Rawat, Bharat, Rodin, Volodymyr, Røhne, Ole, Sandaker, Heidi, Smolyanskiy, Petr, Sowiński, Tomasz, Tefelski, Dariusz, Vafeiadis, Theodoros, Welsch, Carsten, Wolz, Tim, Zawada, Michal, and Zurlo, Nicola

Subjects
Quantum Physics, General Relativity and Quantum Cosmology, Physics - Atomic Physics, Physics - Instrumentation and Detectors
Abstract

A powerful and robust control system is a crucial, often neglected, pillar of any modern, complex physics experiment that requires the management of a multitude of different devices and their precise time synchronisation. The AEgIS collaboration presents CIRCUS, a novel, autonomous control system optimised for time-critical experiments such as those at CERN's Antiproton Decelerator and, more broadly, in atomic and quantum physics research. Its setup is based on Sinara/ARTIQ and TALOS, integrating the ALPACA analysis pipeline, the last two developed entirely in AEgIS. It is suitable for strict synchronicity requirements and repeatable, automated operation of experiments, culminating in autonomous parameter optimisation via feedback from real-time data analysis. CIRCUS has been successfully deployed and tested in AEgIS; being experiment-agnostic and released open-source, other experiments can leverage its capabilities.

Published
2024
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4. Pulsed Production of Antihydrogen in AEgIS

Author

Zurlo N., Auzins M., Bergmann B., Bonomi G., Brusa R.S., Burian P., Camper A., Castelli F., Ciury R., Consolati G., Doser M., Farricker A., Glöggler L., Graczykowski Ł., Grosbart M., Guatieri F., Gusakova N., Haider S., Huck S., Janik M., Kasprowicz G., Khatri G., Kłosowski Ł., Kornakov G., Krumins V., Lappo L., Linek A., Malamant J., Malbrunot C., Mariazzi S., Nowak L., Nowicka D., Oswald E., Pagano D., Penasa L., Piwiński M., Pospisil S., Povolo L., Prelz F., Rangwala S., Rienäcker B., Røhne O.M., Rotondi A., Sandaker H., Smolyanskiy P., Sowiński T., Tefelski D., Testera G., Volponi M., Welsch C.P., Wolz T., Zawada M., and Zielinski J.

Subjects
Physics, QC1-999
Abstract

Low-temperature antihydrogen atoms are an effective tool to probe the validity of the fundamental laws of Physics, for example the Weak Equivalence Principle (WEP) for antimatter, and -generally speaking- it is obvious that colder atoms will increase the level of precision. After the first production of cold antihydrogen in 2002 [1], experimental efforts have substantially progressed, with really competitive results already reached by adapting to cold antiatoms some well-known techniques pre- viously developed for ordinary atoms. Unfortunately, the number of antihydrogen atoms that can be produced in dedicated experiments is many orders of magnitude smaller than of hydrogen atoms, so the development of novel techniques to enhance the production of antihydrogen with well defined (and possibly controlled) conditions is essential to improve the sensitivity. We present here some experimental results achieved by the AEgIS Collaboration, based at the CERN AD (Antiproton Decelerator) on the production of antihydrogen in a pulsed mode where the production time of 90% of atoms is known with an uncertainty of ~ 250 ns [2]. The pulsed antihydrogen source is generated by the charge-exchange reaction between Rydberg positronium (Ps*) and an antiproton (p¯): p¯ + Ps* → H¯* + e−, where Ps* is produced via the implantation of a pulsed positron beam into a mesoporous silica target, and excited by two consecutive laser pulses, and antiprotons are trapped, cooled and manipulated in Penning-Malmberg traps. The pulsed production (which is a major milestone for AEgIS) makes it possible to select the antihydrogen axial temperature and opens the door for the tuning of the antihydrogen Rydberg states, their de-excitation by pulsed lasers and the manipulation through electric field gradients. In this paper, we present the results achieved by AEgIS in 2018, just before the Long Shutdown 2 (LS2), as well as some of the ongoing improvements to the system, aimed at exploiting the lower energy antiproton beam from ELENA [3].

Published
2023
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5. Search for higher twists in meson resonance production in π− N interactions atPT≥2 GeV/c

Author

Bellogianni, A., Benayoun, M., Bloodworth, I. J., Carney, J. N., Di Bari, D., Elia, D., Fini, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph, Malamant, A., Manzari, V., Narjoux, J. -L., Navach, F., Quercigh, E., Šafařík, K., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Vichou, I., Villalobos Baillie, O., Volte, A., Votruba, M. F., Zitoun, R., and WA77 Collaboration

Published
1995
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6. Study of the vector-vector final states centrally produced in pp interactions at 300 GeV/c

Author

Armstrong, T. A., Benayoun, M., Bloodworth, I. J., Carney, J. N., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. F., Zito, G., and WA76 Collaboration

Published
1994
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7. Shape distortions of meson resonances produced in hadron interactions atP T≧2 GeV/c

Author

Bellogianni, A., Benayoun, M., Bloodworth, I. J., Carney, J. N., DiBari, D., Elia, D., Fini, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., Narjoux, J. L., Navach, F., Quercigh, E., Šařík, K., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Vichou, I., Villalobos Baillie, O., Volte, A., Votruba, M. F., Zitoun, R., and WA 77 Collaboration

Published
1994
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8. Study of Φ and f2(1270) meson polarization atp T ≥2 GeV/c in π- interactions at CERN SPS

Author

Belogianni, A., Benayoun, M., Bloodworth, I. J., Carney, J. N., Di Bari, D., Elia, D., Fini, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Krumstein, Z. V., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., Merekov, Yu. P., Narjoux, J. L., Navach, F., Quercigh, E., Satarik, K., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Vichou, I., Villalobos Baillie, O., Volte, A., Votruba, M. F., Zitoun, Z., and WA77 Collaboration

Published
1994
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9. Study of the centrally produced ωρ0 and ωω systems inpp interactions at 300 GeV/c

Author

Armstrong, T. A., Benayoun, M., Bloodworth, I. J., Carney, J. N., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. F., Zito, G., and WA76 Collaboration

Published
1993
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10. Transverse momentum distributions for meson resonances at central rapidity andP T≧2 GeV/c

Author

Belogianni, A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Di Bari, D., Evangelista, C., Fini, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., Narjoux, J. L., Navach, F., Quercigh, E., Šafařík, K., Sené, M., Sené, R., Stassinaki-Spyropoulou, M., Trainor, M. T., Vassiliadis, G., Vichou, I., Villalobos Baillie, O., Votruba, M. F., Zitoun, R., and WA 77 Collaboration

Published
1993
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11. Short-range correlations in hadron pair production atp T ≧2 GeV/c

Author

Bellogianni, A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Di Bari, D., Fini, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Quereigh, E., Šafařik, K., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Vichou, I., Villalobos Baille, O., Volte, A., Vortruba, M. F., Zitoun, R., and WA 77 Collaboration

Published
1992
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12. Further study of theE/f 1 (1420) meson in central production

Author

Armstrong, T. A., Benayoun, M., Bloodworth, I. J., Carney, J. N., Dodenhoff, C. J., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Vassiliadis, G., Villalobos Baillie, O., Votruba, M. F., Zito, G., and WA 76 Collaboration

Published
1992
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13. Study of the centrally producer ππ andK $$\bar K$$ systems at 85 and 300 GeV/c

Author

Armstrong, T. A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Childs, R., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. F., and WA76 Collaboration

Published
1991
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14. A study of the centrally producedK *0 $$K^{*0} \bar K^{*0} $$ final state in the reactionpp→p f (K + K -π+π-)p s at 300 GeV/c

Author

Armstrong, T. A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Childs, R., French, B. R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Baillie, O. Villalobos, Votruba, M. F., Zito, G., Zitoun, R., and WA 76 Collaboration

Published
1990
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15. A study of the centrally produced π+π−π0 system formed in the reactionpp→p f (π+π−π0)p s at 300 GeV/c

Author

Armstrong, T. A., Benayoun, M., Beusch, W., Bloodworth, I. J., Carney, J. N., Childs, R., Evangelista, C., French, B. R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J. B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J. L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Trainor, M. T., Vassiliadis, G., Villalobos Baillie, O., Votruba, M. F., and WA 76 Collaboration

Published
1990
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16. Search for higher twists in meson resonance production in π N interactions at PT≥2 GeV/c.

Author

Bellogianni, A., Benayoun, M., Bloodworth, I., Carney, J., Bari, D., Elia, D., Fini, R., French, B., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph, Malamant, A., Manzari, V., Narjoux, J., and Navach, F.

Abstract

We study the production of meson resonance at pT≥2 GeV/c in π Be interactions at two beam energies (150 and 300 GeV/c). The motivation is to look for the higher twist (HT) production mechanism, expected to exist besides standard hadron production through the fragmentation process of scattered quarks and gluons, the so-called leading twist (LT) mechanism. We show that the φ, K* (892) and K* (892) are found free from HT effects with a good accuracy, as expected from HT estimates and QCD sum rules. The magnitudes of the f (1270) and ρ mesons signals are found larger than expected from the standard Lund (LT) Monte Carlo and from information provided by e e annihilation experiments. The possible connection of these excesses with HT physics is discussed. We also report the first evidence for the production of f (975) mesons in hadronic experiments at large p . [ABSTRACT FROM AUTHOR]

Published
1995
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17. Study of Φ and f(1270) meson polarization at p≥2 GeV/c in π interactions at CERN SPS.

Author

Belogianni, A., Benayoun, M., Bloodworth, I., Carney, J., Bari, D., Elia, D., Fini, R., French, B., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Krumstein, Z., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., and Merekov, Yu.

Abstract

We present the analysis of data samples taken by the WA77 experiment for π interactions at 300 and 150 GeV/c. The trigger selects a pair of oppositely charged particles with p≥2 GeV/c balancing the transverse momentum of a third high- p track. The primary aim of this experiment was the search for higher-twist production, mainly that of vector mesons. Since there are definite predictions for the polarization of mesons produced in fragmentation and through the higher-twist mechanism, we study the polarization properties of clearly identified mesons, namely the Φ and f(1270) mesons. The results are compatible with no polarization. This can be interpreted as a production dominantly due to parton fragmentation. [ABSTRACT FROM AUTHOR]

Published
1994
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18. Shape distortions of meson resonances produced in hadron interactions at P≧2 GeV/c.

Author

Bellogianni, A., Benayoun, M., Bloodworth, I., Carney, J., DiBari, D., Elia, D., Fini, R., French, B., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., Narjoux, J., and Navach, F.

Abstract

We study the shape of the invariant mass spectra of several resonances produced at P≧2.0 GeV/c and observed through two-particle final states, namely the f(1270), K(892), $$\bar K*(892)$$ , K(1430), and $$\bar K*(1430)$$ mesons. The data sample comes from π Be interactions at P=150 GeV/c and 300 GeV/c which have been collected using the OMEGA spectrometer at CERN. We find that although these meson resonances have their masses and widths consistent with the corresponding world average values, their shapes are all subject to the same kind of distortion: their low-mass tail is enhanced while their high-mass tail is sharply cut. This observation indicates that meson resonances produced in the fragmentation of quarks and gluons are distorted by the same damping factor in a way which preserves their masses and lifetimes. [ABSTRACT FROM AUTHOR]

Published
1994
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19. Transverse momentum distributions for meson resonances at central rapidity and P≧2 GeV/c.

Author

Belogianni, A., Benayoun, M., Beusch, W., Bloodworth, I., Carney, J., Bari, D., Evangelista, C., Fini, R., French, B., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Manzari, V., and Narjoux, J.

Abstract

The transverse momentum distributions for $$\rho ^0 (770),f_2 (1270),K*^0 (892),\bar K*^0 (892)$$ and ϕ (1020) have been studied in the p region between 2 and 4 GeV/c and central rapidity. The data analysed come from the WA77 experiment at CERN with a 300 GeV/c π beam incident on a Be target. These distributions are well described by the function p with n∼8. A sample of simulated events from the Lund Monte Carlo in the same experimental conditions reproduces well the data. [ABSTRACT FROM AUTHOR]

Published
1993
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20. Study of the centrally produced ωρ and ωω systems in pp interactions at 300 GeV/c.

Author

Armstrong, T., Benayoun, M., Bloodworth, I., Carney, J., Evangelista, C., French, B., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J., Navach, F., Palano, A., and Redaelli, N.

Abstract

We have performed a search for vector-vector final states centrally produced in proton proton interactions at 300 GeV/c using the CERN Ω spectrometer. Evidence is found for ωρ production in the reaction pp→ p(2π2π2π) p and for ωω production in the reaction pp→ p(2π2π2π) p. However no evidence is found for ωø production in the reaction pp→ p( K Kπππ) p. [ABSTRACT FROM AUTHOR]

Published
1993
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21. Further study of the E/f (1420) meson in central production.

Author

Armstrong, T., Benayoun, M., Bloodworth, I., Carney, J., Dodenhoff, C., Evangelista, C., French, B., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J., Navach, F., and Palano, A.

Abstract

We have studied the reactions $$({{\pi ^ + } \mathord{\left/ {\vphantom {{\pi ^ + } p}} \right. \kern-\nulldelimiterspace} p})p \to ({{\pi ^ + } \mathord{\left/ {\vphantom {{\pi ^ + } p}} \right. \kern-\nulldelimiterspace} p})(K\bar K\pi )p$$ where the $$K\bar K\pi $$ system is centrally produced, at 85 GeV/c and 300 GeV/c using the CERN Omega spectrometer. A spin-parity analysis of the K K π system shows the presence of a strong J=1 signal which we identify as the E/f (1420) meson. We also find evidence for the decay E/f(1420)→ K K π which determines the C-parity of this state to be positive. Alternative explanations of the data have been tested and ruled out. Hence we obtain the quantum numbers of the E/f (1420) to be I(J)=0(1). [ABSTRACT FROM AUTHOR]

Published
1992
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22. Short-range correlations in hadron pair production at p≧2 GeV/c.

Author

Bellogianni, A., Benayoun, M., Beusch, W., Bloodworth, I., Carney, J., Bari, D., Fini, R., French, B., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J., Navach, F., and Palano, A.

Abstract

Production of oppositely charged particle pairs at large p is studied, where both particles, are in the central rapidity region within one unit of rapidity and nearby in azimuth. The data sample, which comes from π Be interactions obtained using the CERN OMEGA spectrometer, contains events with a pair of oppositely charged particles having p≧2 GeV/c recoiling, against a third one with p≧1 GeV/c. Our data provide new information on short range correlations involving the production of the nine possible pairs made from ( π, K, p) and $$(\pi ^ - ,K^ - ,\bar p)$$ . Comparison with Lund Monte Carlo predictions is made. Apart from proton yields, the model reproduces correctly our data. The main discrepancies observed with protons can be attributed to hard scattering of diquarks from the target nucleons. [ABSTRACT FROM AUTHOR]

Published
1992
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23. Study of the centrally producer ππ and K $$\bar K$$ systems at 85 and 300 GeV/c.

Author

Armstrong, T., Benayoun, M., Beusch, W., Bloodworth, I., Carney, J., Childs, R., Evangelista, C., French, B., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J., and Navach, F.

Abstract

We have studied the ππ and K $$\bar K$$ systems centrally produced in proton proton collisions at 300 GeV/c and π/ p proton collisions at 85 GeV/c using the CERN Ω spectrometer. Clear evidence for S/ f(975) production is observed. An analysis performed on the π π mass spectrum in the 1.0 GeV region, using a coupled channel formalism, shows that it is possible to describe the S/ f(975) effect with one single resonance once interference of the S/ f(975) with the S-wave background is introduced. The resulting S/ f(975) parameters are m=979±4MeV, g=0.28±0.04, g=0.56±0.18 corresponding to a pole position on sheet II at (1001±2)− i(36±4) MeV. Evidence is also found for a structure having a mass of 1472±12 MeV and a width of 195±33 MeV. [ABSTRACT FROM AUTHOR]

Published
1991
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24. A study of the centrally produced πππ system formed in the reaction pp→ p(πππ) p at 300 GeV/c.

Author

Armstrong, T., Benayoun, M., Beusch, W., Bloodworth, I., Carney, J., Childs, R., Evangelista, C., French, B., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J., and Navach, F.

Abstract

The reaction pp→ p(πππ) p, where the πππ system is centrally produced, has been studied at 300 GeV/c. The πππ mass spectrum shows evidence for the η, ω and a (1320) as well as an enhancement in the a (1260) region. A Dalitz plot analysis of the πππ system has been performed. The a (1260) parameters coming from the fit of the 1 S wave are m=1208±15 MeV and Γ=430±50 MeV. No evidence is found for the h(1170) or h(1380). [ABSTRACT FROM AUTHOR]

Published
1990
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25. A study of the centrally produced K $$K^{*0} \bar K^{*0} $$ final state in the reaction pp→ p( K Kππ) p at 300 GeV/c.

Author

Armstrong, T., Benayoun, M., Beusch, W., Bloodworth, I., Carney, J., Childs, R., French, B., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J., Navach, F., Palano, A., and Quercigh, E.

Abstract

The reaction pp→ p( K Kππ) p, where the K K ππ system is centrally produced, has been studied at 300 GeV/c. The K $$K^{*0} \bar K^{*0} $$ final state has been observed and the cross sections for its central production are found to be the same at 300 and 85 GeV/c. The K $$K^{*0} \bar K^{*0} $$ final state appears to be produced as a non-resonant threshold enhancement. [ABSTRACT FROM AUTHOR]

Published
1990
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26. Study of the centrally produced ππ and [formula omitted] systems

Author

Armstrong, T.A., Benayoun, M., Beusch, W., Bloodworth, I.J., Carney, J.N., Childs, R., Evangelista, C., French, B.R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J.B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J.L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Stassinaki, M., Trainor, M.T., Vassiliadis, G., Villalobos Baillie, O., and Votruba, M.F.

Published
1991
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27. Strangeness production in sulphur-tungsten interactions at 200 GeV/c per nucleon

Author

Abatzis, S., Benayoun, M., Beusch, W., Bloodworth, I.J., Bravar, A., Caponero, M., Carney, J.N., Dufey, J.P., Evans, D., Falcone, R., Fini, R., French, B.R., Ghidini, B., Jacholkowski, A., Kahane, J., Kinson, J.B., Kirk, A., Knudson, K., Lassalle, J.C., Lenti, V., Leruste, Ph., Loconsole, R.A., Malamant, A., Navach, F., Narjoux, J.L., Palano, A., Penzo, A., Quercigh, E., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Trainor, M.T., Vassiliadis, G., Villalobos Baillie, O., Volte, A., Votruba, M.F., and Zitoun, R.

Published
1990
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28. A search for non-q [formula omitted] mesons in the central region

Author

Armstrong, T.A., Benayoun, M., Beusch, W., Bloodworth, I.J., Carney, J.N., Childs, R., Evangelista, C., French, B.R., Ghidini, B., Girone, M., Jacholkowski, A., Kahane, J., Kinson, J.B., Kirk, A., Knudson, K., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J.L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Sené, R., Stassinaki, M., Trainor, M.T., Vassiliadis, G., Baillie, O.Villalobos, and Votruba, M.F.

Published
1990
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29. Direct ϱ 0 production at large p T

Author

Belogianni, A., Benayoun, M., Beusch, W., Bloodworth, I.J., Caponero, M., Carney, J.N., Childs, R., Dufey, J.P., Fini, R., French, B.R., Ghidini, B., Goldschmidt-Clermont, Y., Ingelman, G., Jacholkowski, A., Kahane, J., Kinson, J.B., Kirk, A., Knudson, K., Lasalle, J.C., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J.L., Navach, F., Palano, A., Petronzio, R., Print, I.C., Quercigh, E., Sené, M., Sené, R., Shaylor, H.R., Stassinaki, M., Trainor, M.T., Strachman, Z., Vassiliadis, G., Villalobos Baillie, O., Volte, A., Votruba, M.F., Zito, G., and Zitoun, R.

Published
1989
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30. Use of silicon microstrip detectors for precise measurement of high momenta

Author

Armstrong, T.A., Benayoun, M., Beusch, W., Bloodworth, I.J., Caponero, M., Carney, J.N., Childs, R., French, B.R., Ghidini, B., Goldschmidt-Clermont, Y., Jacholkowski, A., Kahane, J., Kinson, J.B., Kirk, A., Lenti, V., Leruste, Ph., Malamant, A., Narjoux, J.L., Navach, F., Palano, A., Quercigh, E., Redaelli, N., Rossi, L., Sené, M., Sené, R., Shaylor, H.R., Stassinaki, M., Trainor, M.T., Vassiliadis, G., Villalobos Baillie, O., Votruba, M.F., Zito, G., and Zitoun, R.

Published
1989
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