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26 results on '"Quintans, C."'

1. Multiplicities of positive and negative pions, kaons and unidentified hadrons from deep-inelastic scattering of muons off a liquid hydrogen target

Author

Alexeev, G. D., Alexeev, M. G., Alice, C., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Badelek, B., Barth, J., Beck, R., Beckers, J., Bedfer, Y., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Chang, W. -C., Chatterjee, C., Chiosso, M., Chung, S. -U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D'Ago, D., Torre, S. Dalla, Dasgupta, S. S., Dasgupta, S., Delcarro, F., Denisenko, I., Denisov, O. Yu., Donskov, S. V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R. R., Ecker, D., Eremeev, D., Faccioli, P., Faessler, M., Finger, M., Finger jr., M., Fischer, H., Flöthner, K. J., Florian, W., Friedrich, J. M., Frolov, V., Ordòñez, L. G. Garcia, Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Grasso, A., Gridin, A., Perdekamp, M. Grosse, Grube, B., Grüner, M., Guskov, A., Haas, P., von Harrach, D., Hoffmann, M., d'Hose, N., Hsieh, C. -Y., Ishimoto, S., Ivanov, A., Iwata, T., Jary, V., Joosten, R., Kabuß, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khatun, A., Khaustov, G. V., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Horikawa, K. Kondo, Konorov, I., Korzenev, A. Yu., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Kunne, F., Kurek, K., Kurjata, R. P., Lavickova, K., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Lin, P. -J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Makke, N., Mallot, G. K., Maltsev, A., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Pires, C. Menezes, Metzger, F., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Miura, D., Miyachi, Y., Molina, R., Moretti, A., Nagaytsev, A., Neyret, D., Niemiec, M., Nový, J., Nowak, W. -D., Nukazuka, G., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J. -C., Pešek, M., Peshekhonov, D. V., Pešková, M., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Quintans, C., Reicherz, G., Riedl, C., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sbrizzai, G., Schmieden, H., Selyunin, A., Sinha, L., Spülbeck, D., Srnka, A., Stolarski, M., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Valinoti, B., Veit, B. M., Veloso, J. F. C. A., Vijayakumar, A., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., and Ziembicki, M.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

The multiplicities of positive and negative pions, kaons and unidentified hadrons produced in deep-inelastic scattering are measured in bins of the Bjorken scaling variable $x$, the relative virtual-photon energy $y$ and the fraction of the virtual-photon energy transferred to the final-state hadron $z$. Data were obtained by the COMPASS Collaboration using a 160 GeV muon beam of both electric charges and a liquid hydrogen target. These measurements cover the kinematic domain with photon virtuality $Q^2 > 1$ (GeV/$c)^2$, $0.004 < x < 0.4$, $0.1 < y < 0.7$ and $0.2 < z < 0.85$, in accordance with the kinematic domain used in earlier published COMPASS multiplicity measurements with an isoscalar target. The calculation of radiative corrections was improved by using the Monte Carlo generator DJANGOH, which results in up to 12\% larger corrections in the low-$x$ region., Comment: 19 pages, 29 figures

Published
2024

2. High-statistics measurement of Collins and Sivers asymmetries for transversely polarised deuterons

Author

Alexeev, G. D., Alexeev, M. G., Alice, C., Amoroso, A., Andrieux, V., Anosov, V., Asatryan, S., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Badelek, B., Barth, J., Beck, R., Beckers, J., Bedfer, Y., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Chang, W. -C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S. -U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D'Ago, D., Torre, S. Dalla, Dasgupta, S. S., Dasgupta, S., Delcarro, F., Denisenko, I., Denisov, O. Yu., Donskov, S. V., Doshita, N., Dreisbach, Ch., Dunnweber, W., Dusaev, R. R., Ecker, D., Eremeev, D., Faccioli, P., Faessler, M., Finger, M., Finger jr., M., Fischer, H., Flothner, K. J., Florian, W., Friedrich, J. M., Frolov, V., Ordonez, L. G. Garcia, Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Grasso, A., Gridin, A., Perdekamp, M. Grosse, Grube, B., Gruner, M., Guskov, A., Haas, P., von Harrach, D., Hoffmann, M., Hoghmrtsyan, A., d'Hose, N., Hsieh, C. -Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jary, V., Joosten, R., Kabuss, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khatun, A., Khaustov, G. V., Klasek, T., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Horikawa, K. Kondo, Konorov, I., Konstantinov, V. F., Korzenev, A. Yu., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Lin, P. -J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makke, N., Mallot, G. K., Maltsev, A., Martin, A., Marzec, J., Matousek, J., Matsuda, T., Mattson, G., Pires, C. Menezes, Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Miura, D., Miyachi, Y., Molina, R., Moretti, A., Movsisyan, A., Nagaytsev, A., Neyret, D., Niemiec, M., Novy, J., Nowak, W. -D., Nukazuka, G., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J. -C., Pesek, M., Peshekhonov, D. V., Peskova, M., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sbrizzai, G., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Spulbeck, D., Srnka, A., Stolarski, M., Sulc, M., Suzuki, H., Takanashi, Y., Tessaro, S., Tessarotto, F., Thiel, A., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Valinoti, B., Veit, B. M., Veloso, J. F. C. A., Ventura, B., Vijayakumar, A., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., and Ziembicki, M.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarised $^6$LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 \gevv\ muon beam at CERN, balancing the existing data on transversely polarised proton targets. The first results from about two-thirds of the new data have total uncertainties smaller by up to a factor of three compared to the previous deuteron measurements. Using all the COMPASS proton and deuteron results, both the transversity and the Sivers distribution functions of the $u$ and $d$ quark, as well as the tensor charge in the measured $x$-range are extracted. In particular, the accuracy of the $d$ quark results is significantly improved.

Published
2023

3. Final COMPASS results on the transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan process

Author

Alexeev, G. D., Alexeev, M. G., Alice, C., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Badelek, B., Barth, J., Beck, R., Beckers, J., Bedfer, Y., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Chang, W. -C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S. -U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D'Ago, D., Torre, S. Dalla, Dasgupta, S. S., Dasgupta, S., Delcarro, F., Denisenko, I., Denisov, O. Yu., Donskov, S. V., Doshita, N., Dreisbach, Ch., Dunnweber, W., Dusaev, R. R., Ecker, D., Eremeev, D., Faccioli, P., Faessler, M., Finger, M., Finger jr., M., Fischer, H., Flothner, K. J., Florian, W., Friedrich, J. M., Frolov, V., Ordonez, L. G. Garcia, Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Grasso, A., Gridin, A., Perdekamp, M. Grosse, Grube, B., Gruner, M., Guskov, A., Haas, P., von Harrach, D., Heitz, R., Hoffmann, M., d'Hose, N., Hsieh, C. -Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jary, V., Joosten, R., Kabuss, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khatun, A., Khaustov, G. V., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Horikawa, K. Kondo, Konorov, I., Konstantinov, V. F., Korzenev, A. Yu., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Lin, P. -J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makke, N., Mallot, G. K., Maltsev, A., Martin, A., Marzec, J., Matousek, J., Matsuda, T., Mattson, G., Pires, C. Menezes, Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Miura, D., Miyachi, Y., Molina, R., Moretti, A., Nagaytsev, A., Neyret, D., Niemiec, M., Novy, J., Nowak, W. -D., Nukazuka, G., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J. -C., Pesek, M., Peshekhonov, D. V., Peskova, M., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savada, T., Savin, I. A., Sbrizzai, G., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Spulbeck, D., Srnka, A., Stolarski, M., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Valinoti, B., Veit, B. M., Veloso, J. F. C. A., Ventura, B., Vijayakumar, A., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., and Ziembicki, M.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c $\pi^{-}$ beam impinging on a transversely polarised ammonia target. Combining the data of both years, we present final results on the amplitudes of the five azimuthal modulations in the dimuon production cross section. Three of these transverse-spin-dependent azimuthal asymmetries (TSAs) probe the nucleon leading-twist Sivers, transversity, and pretzelosity transverse-momentum dependent (TMD) parton distribution functions (PDFs). The other two are induced by subleading effects. These TSAs provide unique new inputs for the study of the nucleon TMD PDFs and their universality properties. In particular, the Sivers TSA observed in this measurement is consistent with the fundamental QCD prediction of a sign change of naive time-reversal-odd TMD PDFs when comparing the Drell-Yan process with semi-inclusive measurements of deep inelastic scattering. Also, within the context of model predictions, the observed transversity TSA is consistent with the expectation of a sign change for the Boer-Mulders function.

Published
2023

4. Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of $\rho^0$ mesons

Author

Alexeev, G. D., Alexeev, M. G., Alice, C., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Badelek, B., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V. E., Chang, W. -C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S. -U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D'Ago, D., Torre, S. Dalla, Dasgupta, S. S., Dasgupta, S., Del Carro, F., Denisenko, I., Denisov, O. Yu., Donskov, S. V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R. R., Ecker, D., Efremov, A., Elia, C., Eremeev, D., Faccioli, P., Faessler, M., Finger, M., Finger jr., M., Fischer, H., Flöthner, K. J., Florian, W., Friedrich, J. M., Frolov, V., Ordòñez, L. G. Garcia, Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Gorzellik, M., Grasso, A., Gridin, A., Perdekamp, M. Grosse, Grube, B., Grüner, M., Guskov, A., von Harrach, D., Hoffmann, M., Horikawa, N., d'Hose, N., Hsieh, C. -Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Kabuß, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khatun, A., Khaustov, G. V., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Horikawa, K. Kondo, Konorov, I., Konstantinov, V. F., Korzenev, A. M., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Lin, P. -J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Maltsev, A., Mamon, S. A., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Mattson, G., Pires, C. Menezes, Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Miura, D., Miyachi, Y., Molina, R., Moretti, A., Nagaytsev, A., Naim, C., Neyret, D., Nový, J., Nowak, W. -D., Nukazuka, G., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J. -C., Pešek, M., Peshekhonov, D. V., Pešková, M., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Rudnicki, T., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sbrizzai, G., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Sozzi, F., Spülbeck, D., Srnka, A., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Valinoti, B., Veit, B. M., Veloso, J. F. C. A., Ventura, B., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., and Ziembicki, M.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $\rho^0$ mesons. The analysis is based on the data set collected in deep inelastic scattering in $2010$ using a $160\,\,\rm{GeV}/c$ $\mu^+$ beam impinging on a transversely polarized $\rm{NH}_3$ target. The $\rho^{0}$ mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-$x$ variable, the transverse momentum of the pair and the fraction of the energy $z$ carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.

Published
2022
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5. Spin Density Matrix Elements in Exclusive $\rho ^0$ Meson Muoproduction

Author

Alexeev, G. D., Alexeev, M. G., Alice, C., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Badelek, B., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V. E., Chang, W. -C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S. -U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D'Ago, D., Torre, S. Dalla, Dasgupta, S. S., Dasgupta, S., Del Carro, F., Denisenko, I., Denisov, O. Yu., Donskov, S. V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R. R., Ecker, D., Efremov, A., Eremeev, D., Faccioli, P., Faessler, M., Finger, M., Finger jr., M., Fischer, H., Flöthner, K. J., Florian, W., Friedrich, J. M., Frolov, V., Ordòñez, L. G. Garcia, Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Gorzellik, M., Grasso, A., Gridin, A., Perdekamp, M. Grosse, Grube, B., Grüner, M., Guskov, A., von Harrach, D., Hoffmann, M., Horikawa, N., d'Hose, N., Hsieh, C. -Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Kabuß, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khatun, A., Khaustov, G. V., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Horikawa, K. Kondo, Konorov, I., Konstantinov, V. F., Korzenev, A. M., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Lin, P. -J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Maltsev, A., Mamon, S. A., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Mattson, G., Pires, C. Menezes, Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Miura, D., Miyachi, Y., Molina, R., Moretti, A., Nagaytsev, A., Naim, C., Neyret, D., Niemiec, M., Nový, J., Nowak, W. -D., Nukazuka, G., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J. -C., Pešek, M., Peshekhonov, D. V., Pešková, M., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sbrizzai, G., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Spülbeck, D., Srnka, A., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Valinoti, B., Veit, B. M., Veloso, J. F. C. A., Ventura, B., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., and Ziembicki, M.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $\rho ^0$ meson muoproduction at COMPASS using 160~GeV/$c$ polarised $ \mu ^{+}$ and $ \mu ^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the kinematic range 5.0~GeV/$c^2$ $< W <$ 17.0~GeV/$c^2$, 1.0 (GeV/$c$)$^2$ $< Q^2 <$ 10.0 (GeV/$c$)$^2$ and 0.01 (GeV/$c$)$^2$ $< p_{\rm{T}}^2 <$ 0.5 (GeV/$c$)$^2$. Here, $W$ denotes the mass of the final hadronic system, $Q^2$ the virtuality of the exchanged photon, and $p_{\rm{T}}$ the transverse momentum of the $\rho ^0$ meson with respect to the virtual-photon direction. The measured non-zero SDMEs for the transitions of transversely polarised virtual photons to longitudinally polarised vector mesons ($\gamma^*_T \to V^{ }_L$) indicate a violation of $s$-channel helicity conservation. Additionally, we observe a dominant contribution of natural-parity-exchange transitions and a very small contribution of unnatural-parity-exchange transitions, which is compatible with zero within experimental uncertainties. The results provide important input for modelling Generalised Parton Distributions (GPDs). In particular, they may allow one to evaluate in a model-dependent way the role of parton helicity-flip GPDs in exclusive $\rho ^0$ production.

Published
2022

6. Double $J/\psi$ production in pion-nucleon scattering at COMPASS

Author

Alexeev, G. D., Alexeev, M. G., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Badelek, B., Ball, M., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V. E., Chang, W. -C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S. -U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D'Ago, D., Torre, S. Dalla, Dasgupta, S. S., Dasgupta, S., Denisenko, I., Denisov, O. Yu., Donskov, S. V., Doshita, N., Dreisbach, Ch., Duennweber, W., Dusaev, R. R., Efremov, A., Eremeev, D., Eversheim, P. D., Faccioli, P., Faessler, M., Finger, M., Finger jr., M., Fischer, H., Floethner, K., Florian, W, Franco, C., Friedrich, J. M., Frolov, V., Ordonez, L. G. Garcia, Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Gorzellik, M., Grasso, A., Gridin, A., Groote, S., Perdekamp, M. Grosse, Grube, B., Gruener, M., Guskov, A., von Harrach, D., Hoffmann, M., Horikawa, N., d'Hose, N., Hsieh, C. -Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, T., Joosten, R., Kabuss, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khatun, A., Khaustov, G. V., Khokhlov, Yu. A., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Horikawa, K. Kondo, Konorov, I., Konstantinov, V. F., Korzenev, A., Koshkarev, S., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Lin, P. -J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Maltsev, A., Mamon, S. A., Martin, A., Marzec, J., Matousek, J., Matsuda, T., Mattson, G., Pires, C. Menezes, Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Miyachi, Y., Molina, R., Moretti, A., Nagaytsev, A., Naim, C., Neyret, D., Novy, J., Nowak, W. -D., Nukazuka, G., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J. -C., Pesek, M., Peshekhonov, D. V., Peskova, M., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Rudnicki, T., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sbrizzai, G., Schmeing, S., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Spuelbeck, D., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Triloki, T., Tskhaty, V., Valinoti, B., Veit, B. M., Veloso, J. F. C. A., Ventura, B., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., and Ziembicki, M.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

We present the study of the production of double $J/\psi$ mesons using COMPASS data collected with a 190 GeV/$c$ $\pi^-$ beam scattering off NH$_{3}$, Al and W targets. Kinematic distributions of the collected double $J/\psi$ events are analysed, and the double $J/\psi$ production cross section is estimated for each of the COMPASS targets. The results are compared to predictions from single- and double-parton scattering models as well as the pion intrinsic charm and the tetraquark exotic resonance hypotheses. It is demonstrated that the single parton scattering production mechanism gives the dominant contribution that is sufficient to describe the data. An upper limit on the double intrinsic charm content of pion is evaluated. No significant signatures that could be associated with exotic tetraquarks are found in the double $J/\psi$ mass spectrum., Comment: 12 pages, 4 figures

Published
2022
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8. Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering

Author

Alexeev, G.D., primary, Alexeev, M.G., additional, Alice, C., additional, Amoroso, A., additional, Andrieux, V., additional, Anosov, V., additional, Augsten, K., additional, Augustyniak, W., additional, Azevedo, C.D.R., additional, Badelek, B., additional, Barth, J., additional, Beck, R., additional, Bedfer, Y., additional, Bernhard, J., additional, Bodlak, M., additional, Bradamante, F., additional, Braun, C., additional, Bressan, A., additional, Burtsev, V.E., additional, Chang, W.-C., additional, Chatterjee, C., additional, Chiosso, M., additional, Chumakov, A.G., additional, Chung, S.-U., additional, Cicuttin, A., additional, Correia, P.M.M., additional, Crespo, M.L., additional, D'Ago, D., additional, Dalla Torre, S., additional, Dasgupta, S.S., additional, Dasgupta, S., additional, Del Carro, F., additional, Denisenko, I., additional, Denisov, O.Yu., additional, Donskov, S.V., additional, Doshita, N., additional, Dreisbach, Ch., additional, Dünnweber, W., additional, Dusaev, R.R., additional, Ecker, D., additional, Efremov, A., additional, Elia, C., additional, Eremeev, D., additional, Faccioli, P., additional, Faessler, M., additional, Finger, M., additional, Fischer, H., additional, Flöthner, K.J., additional, Florian, W., additional, Friedrich, J.M., additional, Frolov, V., additional, Garcia Ordòñez, L.G., additional, Gautheron, F., additional, Gavrichtchouk, O.P., additional, Gerassimov, S., additional, Giarra, J., additional, Giordano, D., additional, Gorzellik, M., additional, Grasso, A., additional, Gridin, A., additional, Grosse Perdekamp, M., additional, Grube, B., additional, Grüner, M., additional, Guskov, A., additional, von Harrach, D., additional, Hoffmann, M., additional, Horikawa, N., additional, d'Hose, N., additional, Hsieh, C.-Y., additional, Huber, S., additional, Ishimoto, S., additional, Ivanov, A., additional, Iwata, T., additional, Jandek, M., additional, Jary, V., additional, Joosten, R., additional, Kabuß, E., additional, Kaspar, F., additional, Kerbizi, A., additional, Ketzer, B., additional, Khatun, A., additional, Khaustov, G.V., additional, Klein, F., additional, Koivuniemi, J.H., additional, Kolosov, V.N., additional, Kondo Horikawa, K., additional, Konorov, I., additional, Konstantinov, V.F., additional, Korzenev, A.M., additional, Kotzinian, A.M., additional, Kouznetsov, O.M., additional, Koval, A., additional, Kral, Z., additional, Krinner, F., additional, Kunne, F., additional, Kurek, K., additional, Kurjata, R.P., additional, Kveton, A., additional, Lavickova, K., additional, Levorato, S., additional, Lian, Y.-S., additional, Lichtenstadt, J., additional, Lin, P.-J., additional, Longo, R., additional, Lyubovitskij, V.E., additional, Maggiora, A., additional, Magnon, A., additional, Makins, N., additional, Makke, N., additional, Mallot, G.K., additional, Maltsev, A., additional, Mamon, S.A., additional, Martin, A., additional, Marzec, J., additional, Matoušek, J., additional, Matsuda, T., additional, Mattson, G., additional, Menezes Pires, C., additional, Metzger, F., additional, Meyer, M., additional, Meyer, W., additional, Mikhailov, Yu.V., additional, Mikhasenko, M., additional, Mitrofanov, E., additional, Miura, D., additional, Miyachi, Y., additional, Molina, R., additional, Moretti, A., additional, Nagaytsev, A., additional, Neyret, D., additional, Niemiec, M., additional, Nový, J., additional, Nowak, W.-D., additional, Nukazuka, G., additional, Olshevsky, A.G., additional, Ostrick, M., additional, Panzieri, D., additional, Parsamyan, B., additional, Paul, S., additional, Pekeler, H., additional, Peng, J.-C., additional, Pesaro, G., additional, Pešek, M., additional, Peshekhonov, D.V., additional, Pešková, M., additional, Platchkov, S., additional, Pochodzalla, J., additional, Polyakov, V.A., additional, Quaresma, M., additional, Quintans, C., additional, Reicherz, G., additional, Riedl, C., additional, Ryabchikov, D.I., additional, Rychter, A., additional, Rymbekova, A., additional, Samoylenko, V.D., additional, Sandacz, A., additional, Sarkar, S., additional, Savin, I.A., additional, Sbrizzai, G., additional, Schiavon, P., additional, Schmieden, H., additional, Selyunin, A., additional, Sharko, K., additional, Sinha, L., additional, Slunecka, M., additional, Sozzi, F., additional, Spülbeck, D., additional, Srnka, A., additional, Stolarski, M., additional, Subrt, O., additional, Sulc, M., additional, Suzuki, H., additional, Tessaro, S., additional, Tessarotto, F., additional, Thiel, A., additional, Tomsa, J., additional, Tosello, F., additional, Townsend, A., additional, Triloki, T., additional, Tskhay, V., additional, Valinoti, B., additional, Veit, B.M., additional, Veloso, J.F.C.A., additional, Ventura, B., additional, Virius, M., additional, Wagner, M., additional, Wallner, S., additional, Zaremba, K., additional, Zavertyaev, M., additional, Zemko, M., additional, Zemlyanichkina, E., additional, and Ziembicki, M., additional

Published
2023
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9. Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons

Author

Alexeev, G.D., primary, Alexeev, M.G., additional, Alice, C., additional, Amoroso, A., additional, Andrieux, V., additional, Anosov, V., additional, Augsten, K., additional, Augustyniak, W., additional, Azevedo, C.D.R., additional, Badelek, B., additional, Barth, J., additional, Beck, R., additional, Bedfer, Y., additional, Bernhard, J., additional, Bodlak, M., additional, Bradamante, F., additional, Bressan, A., additional, Burtsev, V.E., additional, Chang, W.-C., additional, Chatterjee, C., additional, Chiosso, M., additional, Chumakov, A.G., additional, Chung, S.-U., additional, Cicuttin, A., additional, Correia, P.M.M., additional, Crespo, M.L., additional, D'Ago, D., additional, Dalla Torre, S., additional, Dasgupta, S.S., additional, Dasgupta, S., additional, Del Carro, F., additional, Denisenko, I., additional, Denisov, O.Yu., additional, Donskov, S.V., additional, Doshita, N., additional, Dreisbach, Ch., additional, Dünnweber, W., additional, Dusaev, R.R., additional, Ecker, D., additional, Efremov, A., additional, Elia, C., additional, Eremeev, D., additional, Faccioli, P., additional, Faessler, M., additional, Finger, M., additional, Fischer, H., additional, Flöthner, K.J., additional, Florian, W., additional, Friedrich, J.M., additional, Frolov, V., additional, Garcia Ordòñez, L.G., additional, Gautheron, F., additional, Gavrichtchouk, O.P., additional, Gerassimov, S., additional, Giarra, J., additional, Giordano, D., additional, Gorzellik, M., additional, Grasso, A., additional, Gridin, A., additional, Grosse Perdekamp, M., additional, Grube, B., additional, Grüner, M., additional, Guskov, A., additional, von Harrach, D., additional, Hoffmann, M., additional, Horikawa, N., additional, d'Hose, N., additional, Hsieh, C.-Y., additional, Huber, S., additional, Ishimoto, S., additional, Ivanov, A., additional, Iwata, T., additional, Jandek, M., additional, Jary, V., additional, Joosten, R., additional, Kabuß, E., additional, Kaspar, F., additional, Kerbizi, A., additional, Ketzer, B., additional, Khatun, A., additional, Khaustov, G.V., additional, Klein, F., additional, Koivuniemi, J.H., additional, Kolosov, V.N., additional, Kondo Horikawa, K., additional, Konorov, I., additional, Konstantinov, V.F., additional, Korzenev, A.M., additional, Kotzinian, A.M., additional, Kouznetsov, O.M., additional, Koval, A., additional, Kral, Z., additional, Krinner, F., additional, Kunne, F., additional, Kurek, K., additional, Kurjata, R.P., additional, Kveton, A., additional, Lavickova, K., additional, Levorato, S., additional, Lian, Y.-S., additional, Lichtenstadt, J., additional, Lin, P.-J., additional, Longo, R., additional, Lyubovitskij, V.E., additional, Maggiora, A., additional, Magnon, A., additional, Makins, N., additional, Makke, N., additional, Mallot, G.K., additional, Maltsev, A., additional, Mamon, S.A., additional, Martin, A., additional, Marzec, J., additional, Matoušek, J., additional, Matsuda, T., additional, Mattson, G., additional, Menezes Pires, C., additional, Metzger, F., additional, Meyer, M., additional, Meyer, W., additional, Mikhailov, Yu.V., additional, Mikhasenko, M., additional, Mitrofanov, E., additional, Miura, D., additional, Miyachi, Y., additional, Molina, R., additional, Moretti, A., additional, Nagaytsev, A., additional, Naim, C., additional, Neyret, D., additional, Nový, J., additional, Nowak, W.-D., additional, Nukazuka, G., additional, Olshevsky, A.G., additional, Ostrick, M., additional, Panzieri, D., additional, Parsamyan, B., additional, Paul, S., additional, Pekeler, H., additional, Peng, J.-C., additional, Pešek, M., additional, Peshekhonov, D.V., additional, Pešková, M., additional, Platchkov, S., additional, Pochodzalla, J., additional, Polyakov, V.A., additional, Quaresma, M., additional, Quintans, C., additional, Reicherz, G., additional, Riedl, C., additional, Rudnicki, T., additional, Ryabchikov, D.I., additional, Rychter, A., additional, Rymbekova, A., additional, Samoylenko, V.D., additional, Sandacz, A., additional, Sarkar, S., additional, Savin, I.A., additional, Sbrizzai, G., additional, Schmieden, H., additional, Selyunin, A., additional, Sharko, K., additional, Sinha, L., additional, Slunecka, M., additional, Sozzi, F., additional, Spülbeck, D., additional, Srnka, A., additional, Stolarski, M., additional, Subrt, O., additional, Sulc, M., additional, Suzuki, H., additional, Tessaro, S., additional, Tessarotto, F., additional, Thiel, A., additional, Tomsa, J., additional, Tosello, F., additional, Townsend, A., additional, Triloki, T., additional, Tskhay, V., additional, Valinoti, B., additional, Veit, B.M., additional, Veloso, J.F.C.A., additional, Ventura, B., additional, Virius, M., additional, Wagner, M., additional, Wallner, S., additional, Zaremba, K., additional, Zavertyaev, M., additional, Zemko, M., additional, Zemlyanichkina, E., additional, and Ziembicki, M., additional

Published
2023
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11. Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of Mesons

Author

Alexeev, G.D., Alexeev, M.G., Alice, C., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C.D.R., Badelek, B., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V.E., Chang, W.C., Chatterjee, C., Chiosso, M., Chumakov, A.G., Chung, S.U., Cicuttin, A., Correia, P.M.M., Crespo, M.L., D'Ago, D., Dalla Torre, S., Dasgupta, S.S., Dasgupta, S., Del Carro, F., Denisenko, I., Denisov, O.Yu., Donskov, S.V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R.R., Ecker, D., Efremov, A., Elia, C., Eremeev, D., Faccioli, P., Faessler, M., Finger, M., Fischer, H., Flöthner, K.J., Florian, W., Friedrich, J.M., Frolov, V., Garcia Ordòñez, L.G., Gautheron, F., Gavrichtchouk, O.P., Gerassimov, S., Giarra, J., Giordano, D., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Grüner, M., Guskov, A., von Harrach, D., Hoffmann, M., Horikawa, N., d'Hose, N., Hsieh, C.Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Kabuß, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khatun, A., Khaustov, G.V., Klein, F., Koivuniemi, J.H., Kolosov, V.N., Kondo Horikawa, K., Konorov, I., Konstantinov, V.F., Korzenev, A.M., Kotzinian, A.M., Kouznetsov, O.M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R.P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y.S., Lichtenstadt, J., Lin, P.J., Longo, R., Lyubovitskij, V.E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G.K., Maltsev, A., Mamon, S.A., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Mattson, G., Menezes Pires, C., Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu.V., Mikhasenko, M., Mitrofanov, E., Miura, D., Miyachi, Y., Molina, R., Moretti, A., Nagaytsev, A., Naim, C., Neyret, D., Nový, J., Nowak, W.D., Nukazuka, G., Olshevsky, A.G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J.C., Pešek, M., Peshekhonov, D.V., Pešková, M., Platchkov, S., Pochodzalla, J., Polyakov, V.A., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Rudnicki, T., Ryabchikov, D.I., Rychter, A., Rymbekova, A., Samoylenko, V.D., Sandacz, A., Sarkar, S., Savin, I.A., Sbrizzai, G., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Sozzi, F., Spülbeck, D., Srnka, A., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Valinoti, B., Veit, B.M., Veloso, J.F.C.A., Ventura, B., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., and Ziembicki, M.

Abstract

The production of vector mesons in deep inelastic scattering is an interesting yet scarcely explored channel to study the transverse spin structure of the nucleon and the spin-dependence of fragmentation. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced ρ0 mesons. The analysis is based on the data set collected in deep inelastic scattering in 2010 using a 160GeV/c μ+ beam impinging on a transversely polarized NH3 target. The ρ0 mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-x variable, the transverse momentum of the pair and the fraction of the energy z carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.

Published
2023

12. Design of beam optics for RF-separated kaon and antiproton beams in the M2 beam line of the CERN North Area

Author

Gerbershagen, A., primary, Andrieux, V., additional, Bernhard, J., additional, Brugger, M., additional, Denisov, O., additional, Friedrich, J., additional, Gatignon, L., additional, Gerigk, F., additional, Guskov, A., additional, Ketzer, B., additional, Metzger, F., additional, Nowak, W.-D., additional, Quintans, C., additional, and Schuh, S., additional

Published
2023
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13. Double J/ψ production in pion-nucleon scattering at COMPASS

Author

Alexeev, G.D., primary, Alexeev, M.G., additional, Amoroso, A., additional, Andrieux, V., additional, Anosov, V., additional, Augsten, K., additional, Augustyniak, W., additional, Azevedo, C.D.R., additional, Badełek, B., additional, Ball, M., additional, Barth, J., additional, Beck, R., additional, Bedfer, Y., additional, Bernhard, J., additional, Bodlak, M., additional, Bradamante, F., additional, Bressan, A., additional, Burtsev, V.E., additional, Chang, W.-C., additional, Chatterjee, C., additional, Chiosso, M., additional, Chumakov, A.G., additional, Chung, S.-U., additional, Cicuttin, A., additional, Correia, P.M.M., additional, Crespo, M.L., additional, D'Ago, D., additional, Dalla Torre, S., additional, Dasgupta, S.S., additional, Dasgupta, S., additional, Denisenko, I., additional, Denisov, O.Yu., additional, Donskov, S.V., additional, Doshita, N., additional, Dreisbach, Ch., additional, Dünnweber, W., additional, Dusaev, R.R., additional, Ecker, D., additional, Efremov, A., additional, Eremeev, D., additional, Eversheim, P.D., additional, Faccioli, P., additional, Faessler, M., additional, Finger, M., additional, Fischer, H., additional, Flöthner, K.J., additional, Florian, W., additional, Franco, C., additional, Friedrich, J.M., additional, Frolov, V., additional, Garcia Ordòñez, L.G., additional, Gautheron, F., additional, Gavrichtchouk, O.P., additional, Gerassimov, S., additional, Giarra, J., additional, Giordano, D., additional, Gorzellik, M., additional, Grasso, A., additional, Gridin, A., additional, Groote, S., additional, Grosse Perdekamp, M., additional, Grube, B., additional, Grüner, M., additional, Guskov, A., additional, von Harrach, D., additional, Hoffmann, M., additional, Horikawa, N., additional, d'Hose, N., additional, Hsieh, C.-Y., additional, Huber, S., additional, Ishimoto, S., additional, Ivanov, A., additional, Iwata, T., additional, Jandek, M., additional, Jary, V., additional, Joosten, R., additional, Kabuß, E., additional, Kaspar, F., additional, Kerbizi, A., additional, Ketzer, B., additional, Khatun, A., additional, Khaustov, G.V., additional, Khokhlov, Yu.A., additional, Klein, F., additional, Koivuniemi, J.H., additional, Kolosov, V.N., additional, Kondo Horikawa, K., additional, Konorov, I., additional, Konstantinov, V.F., additional, Korzenev, A.M., additional, Koshkarev, S., additional, Kotzinian, A.M., additional, Kouznetsov, O.M., additional, Koval, A., additional, Kral, Z., additional, Krinner, F., additional, Kunne, F., additional, Kurek, K., additional, Kurjata, R.P., additional, Kveton, A., additional, Lavickova, K., additional, Levorato, S., additional, Lian, Y.-S., additional, Lichtenstadt, J., additional, Lin, P.-J., additional, Longo, R., additional, Lyubovitskij, V.E., additional, Maggiora, A., additional, Magnon, A., additional, Makins, N., additional, Makke, N., additional, Mallot, G.K., additional, Maltsev, A., additional, Mamon, S.A., additional, Martin, A., additional, Marzec, J., additional, Matoušek, J., additional, Matsuda, T., additional, Mattson, G., additional, Menezes Pires, C., additional, Metzger, F., additional, Meyer, M., additional, Meyer, W., additional, Mikhailov, Yu.V., additional, Mikhasenko, M., additional, Mitrofanov, E., additional, Miyachi, Y., additional, Molina, R., additional, Moretti, A., additional, Nagaytsev, A., additional, Naim, C., additional, Neyret, D., additional, Nový, J., additional, Nowak, W.-D., additional, Nukazuka, G., additional, Olshevsky, A.G., additional, Ostrick, M., additional, Panzieri, D., additional, Parsamyan, B., additional, Paul, S., additional, Pekeler, H., additional, Peng, J.-C., additional, Pešek, M., additional, Peshekhonov, D.V., additional, Pešková, M., additional, Platchkov, S., additional, Pochodzalla, J., additional, Polyakov, V.A., additional, Pretz, J., additional, Quaresma, M., additional, Quintans, C., additional, Reicherz, G., additional, Riedl, C., additional, Rudnicki, T., additional, Ryabchikov, D.I., additional, Rychter, A., additional, Rymbekova, A., additional, Samoylenko, V.D., additional, Sandacz, A., additional, Sarkar, S., additional, Savin, I.A., additional, Sbrizzai, G., additional, Schmieden, H., additional, Selyunin, A., additional, Sharko, K., additional, Sinha, L., additional, Slunecka, M., additional, Spülbeck, D., additional, Srnka, A., additional, Stolarski, M., additional, Subrt, O., additional, Sulc, M., additional, Suzuki, H., additional, Tessaro, S., additional, Tessarotto, F., additional, Thiel, A., additional, Tomsa, J., additional, Tosello, F., additional, Townsend, A., additional, Triloki, T., additional, Tskhay, V., additional, Valinoti, B., additional, Veit, B.M., additional, Veloso, J.F.C.A., additional, Ventura, B., additional, Virius, M., additional, Wagner, M., additional, Wallner, S., additional, Zaremba, K., additional, Zavertyaev, M., additional, Zemko, M., additional, Zemlyanichkina, E., additional, and Ziembicki, M., additional

Published
2023
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14. Design of beam optics for RF-separated kaon and antiproton beams in the M2 beam line of the CERN North Area:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Author

Gerbershagen, A., Andrieux, V., Bernhard, J., Brugger, M., Denisov, O., Friedrich, J., Gatignon, L., Gerigk, F., Guskov, A., Ketzer, B., Metzger, F., Nowak, W.-D., Quintans, C., Schuh, S., Gerbershagen, A., Andrieux, V., Bernhard, J., Brugger, M., Denisov, O., Friedrich, J., Gatignon, L., Gerigk, F., Guskov, A., Ketzer, B., Metzger, F., Nowak, W.-D., Quintans, C., and Schuh, S.

Abstract

The present contribution reviews the principle of RF separation and explains its dependence on different parameters of beam optics and hardware. The first examination of potential showstoppers for the RF-separated beam implementation for Phase-2 of the AMBER experiment in the M2 beam line of the North Area is presented. Different beam optics settings have been examined, providing either focused or parallel beams inside the RF cavities. The separation and transmission capability of the different optics settings for realistic characteristics of RF cavities are discussed and the preliminary results of the potential purity and intensity of the RF-separated beam are presented. These show that a trade-off between the overall beam intensity and the share of the required particle type in the overall beam needs to be established. No showstoppers have been identified for achieving the beam parameters required for AMBER's kaonic Primakoff reactions, kaon spectroscopy, prompt-photon production and kaon charge-radius programs. However, the high beam intensity requirements of the AMBER Drell–Yan programme cannot be satisfied with an RF-separated beam.

Published
2023

16. Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of $\rho^0$ mesons

Author

Alexeev, G.D., Alexeev, M.G., Alice, C., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C.D.R., Badelek, B., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V.E., Chang, W.-C., Chatterjee, C., Chiosso, M., Chumakov, A.G., Chung, S.-U., Cicuttin, A., Correia, P.M.M., Crespo, M.L., D'Ago, D., Dalla Torre, S., Dasgupta, S.S., Dasgupta, S., Del Carro, F., Denisenko, I., Denisov, O.Yu., Donskov, S.V., Doshita, N., Dreisbach, Ch., d, W. Dünnweber, Dusaev, R.R., Ecker, D., Efremov, A., Elia, C., Eremeev, D., Faccioli, P., d, M. Faessler, Finger, M., Finger, M., jr., Fischer, H., Flöthner, K.J., Florian, W., Friedrich, J.M., Frolov, V., Ordòñez, L.G. Garcia, Gautheron, F., Gavrichtchouk, O.P., Gerassimov, S., Giarra, J., Giordano, D., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Grüner, M., Guskov, A., von Harrach, D., Hoffmann, M., Horikawa, N., d'Hose, N., Hsieh, C.-Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Kabuß, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khatun, A., Khaustov, G.V., Klein, F., Koivuniemi, J.H., Kolosov, V.N., Kondo Horikawa, K., Konorov, I., Konstantinov, V.F., Korzenev, A.M., Kotzinian, A.M., Kouznetsov, O.M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R.P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y.-S., Lichtenstadt, J., Lin, P.-J., Longo, R., Lyubovitskij, V.E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G.K., Maltsev, A., Mamon, S.A., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Mattson, G., Pires, C. Menezes, Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu.V., Mikhasenko, M., Mitrofanov, E., Miura, D., Miyachi, Y., Molina, R., Moretti, A., Nagaytsev, A., Naim, C., Neyret, D., Nový, J., Nowak, W.-D., Nukazuka, G., Olshevsky, A.G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J.-C., Pešek, M., Peshekhonov, D.V., Pešková, M., Platchkov, S., Pochodzalla, J., Polyakov, V.A., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Rudnicki, T., Ryabchikov, D.I., Rychter, A., Rymbekova, A., Samoylenko, V.D., Sandacz, A., Sarkar, S., Savin, I.A., Sbrizzai, G., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Sozzi, F., Spülbeck, D., Srnka, A., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Valinoti, B., Veit, B.M., Veloso, J.F.C.A., Ventura, B., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., and Ziembicki, M.

Subjects
High Energy Physics - Phenomenology, Particle Physics - Experiment, High Energy Physics - Experiment, Particle Physics - Phenomenology
Abstract

The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $\rho^0$ mesons. The analysis is based on the data set collected in deep inelastic scattering in $2010$ using a $160\,\,\rm{GeV}/c$ $\mu^+$ beam impinging on a transversely polarized $\rm{NH}_3$ target. The $\rho^{0}$ mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-$x$ variable, the transverse momentum of the pair and the fraction of the energy $z$ carried by the pair. Indications for positive Collins and Sivers asymmetries are observed. The production of vector mesons in deep inelastic scattering is an interesting yet scarcely explored channel to study the transverse spin structure of the nucleon and the spin-dependence of fragmentation. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced ρ0 mesons. The analysis is based on the data set collected in deep inelastic scattering in 2010 using a 160GeV/cμ+ beam impinging on a transversely polarized NH3 target. The ρ0 mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-x variable, the transverse momentum of the pair and the fraction of the energy z carried by the pair. Indications for positive Collins and Sivers asymmetries are observed. The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $\rho^0$ mesons. The analysis is based on the data set collected in deep inelastic scattering in $2010$ using a $160\,\,\rm{GeV}/c$$\mu^+$ beam impinging on a transversely polarized $\rm{NH}_3$ target. The $\rho^{0}$ mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-$x$ variable, the transverse momentum of the pair and the fraction of the energy $z$ carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.

Published
2022

17. Exotic meson pi(1) (1600) with J(PC)=1(-+) and its decay into rho(770)pi

Author

Alexeev, GD, Alexeev, MG, Amoroso, A, Andrieux, V, Anosov, V, Augsten, K, Augustyniak, W, Azevedo, CDR, Badelek, B, Balestra, F, Ball, M, Barth, J, Beck, R, Bedfer, Y, Antequera, JB, Bernhard, J, Bodlak, M, Bradamante, F, Bressan, A, Burtsev, VE, Chang, WC, Chatterjee, C, Chiosso, M, Chumakov, AG, Chung, SU, Cicuttin, A, Correia, PMM, Crespo, ML, D'Ago, D, Dalla Torre, S, Dasgupta, SS, Dasgupta, S, Denisenko, I, Denisov, OY, Donskov, SV, Doshita, N, Dreisbach, C, Dunnweber, W, Dusaev, RR, Efremov, A, Eremeev, D, Eversheim, PD, Faccioli, P, Faessler, M, Finger, M, Fischer, H, Floethner, K, Franco, C, Friedrich, JM, Frolov, V, Ordonez, LG, Gautheron, F, Gavrichtchouk, OP, Gerassimov, S, Giarra, J, Giordano, D, Gorzellik, M, Grasso, A, Gridin, A, Perdekamp, MG, Grube, B, Gruner, M, Guskov, A, Haas, F, von Harrach, D, Heitz, R, Hoffmann, M, Horikawa, N, D'Hose, N, Hsieh, CY, Huber, S, Ishimoto, S, Ivanov, A, Iwata, T, Jandek, M, Jary, V, Joosten, R, Kabuss, E, Kaspar, F, Kerbizi, A, Ketzer, B, Khaustov, GV, Khokhlov, YA, Kisselev, Y, Klein, F, Koivuniemi, JH, Kolosov, VN, Konorov, I, Konstantinov, VF, Kotzinian, AM, Kouznetsov, OM, Koval, A, Kral, Z, Krinner, F, Kunne, F, Kurek, K, Kurjata, RP, Kveton, A, Lavickova, K, Levorato, S, Lian, YS, Lichtenstadt, J, Lin, PJ, Longo, R, Lyubovitskij, VE, Maggiora, A, Magnon, A, Makins, N, Makke, N, Mallot, GK, Maltsev, A, Mamon, SA, Marianski, B, Martin, A, Marzec, J, Matousek, J, Matsuda, T, Mattson, G, Metzger, F, Meyer, M, Meyer, W, Mikhailov, YV, Mikhasenko, M, Mitrofanov, E, Miyachi, Y, Moretti, A, Nagaytsev, A, Naim, C, Neyret, D, Novy, J, Nowak, WD, Nukazuka, G, Olshevsky, AG, Ostrick, M, Panzieri, D, Parsamyan, B, Paul, S, Pekeler, H, Peng, JC, Pesek, M, Peshekhonov, DV, Peskova, M, Pierre, N, Platchkov, S, Pochodzalla, J, Polyakov, VA, Pretz, J, Quaresma, M, Quintans, C, Reicherz, G, Riedl, C, Rudnicki, T, Ryabchikov, DI, Rychter, A, Rymbekova, A, Samoylenko, VD, Sandacz, A, Sarkar, S, Savin, IA, Sbrizzai, G, Schmeing, S, Schmieden, H, Selyunin, A, Sharko, K, Sinha, L, Slunecka, M, Spulbeck, D, Srnka, A, Steffen, D, Stolarski, M, Subrt, O, Sulc, M, Suzuki, H, Tessaro, S, Tessarotto, F, Thiel, A, Tomsa, J, Tosello, F, Townsend, A, Triloki, T, Tskhay, V, Uhl, S, Valinoti, B, Vauth, A, Veit, BM, Veloso, J, Ventura, B, Vidon, A, Virius, M, Wagner, M, Wallner, S, Zaremba, K, Zavertyaev, M, Zemko, M, Zemlyanichkina, E, Zhao, Y, Ziembicki, M, Alexeev, Gd, Alexeev, Mg, Amoroso, A, Andrieux, V, Anosov, V, Augsten, K, Augustyniak, W, Azevedo, Cdr, Badelek, B, Balestra, F, Ball, M, Barth, J, Beck, R, Bedfer, Y, Antequera, Jb, Bernhard, J, Bodlak, M, Bradamante, F, Bressan, A, Burtsev, Ve, Chang, Wc, Chatterjee, C, Chiosso, M, Chumakov, Ag, Chung, Su, Cicuttin, A, Correia, Pmm, Crespo, Ml, D'Ago, D, Dalla Torre, S, Dasgupta, S, Denisenko, I, Denisov, Oy, Donskov, Sv, Doshita, N, Dreisbach, C, Dunnweber, W, Dusaev, Rr, Efremov, A, Eremeev, D, Eversheim, Pd, Faccioli, P, Faessler, M, Finger, M, Fischer, H, Floethner, K, Franco, C, Friedrich, Jm, Frolov, V, Ordonez, Lg, Gautheron, F, Gavrichtchouk, Op, Gerassimov, S, Giarra, J, Giordano, D, Gorzellik, M, Grasso, A, Gridin, A, Perdekamp, Mg, Grube, B, Gruner, M, Guskov, A, Haas, F, von Harrach, D, Heitz, R, Hoffmann, M, Horikawa, N, D'Hose, N, Hsieh, Cy, Huber, S, Ishimoto, S, Ivanov, A, Iwata, T, Jandek, M, Jary, V, Joosten, R, Kabuss, E, Kaspar, F, Kerbizi, A, Ketzer, B, Khaustov, Gv, Khokhlov, Ya, Kisselev, Y, Klein, F, Koivuniemi, Jh, Kolosov, Vn, Konorov, I, Konstantinov, Vf, Kotzinian, Am, Kouznetsov, Om, Koval, A, Kral, Z, Krinner, F, Kunne, F, Kurek, K, Kurjata, Rp, Kveton, A, Lavickova, K, Levorato, S, Lian, Y, Lichtenstadt, J, Lin, Pj, Longo, R, Lyubovitskij, Ve, Maggiora, A, Magnon, A, Makins, N, Makke, N, Mallot, Gk, Maltsev, A, Mamon, Sa, Marianski, B, Martin, A, Marzec, J, Matousek, J, Matsuda, T, Mattson, G, Metzger, F, Meyer, M, Meyer, W, Mikhailov, Yv, Mikhasenko, M, Mitrofanov, E, Miyachi, Y, Moretti, A, Nagaytsev, A, Naim, C, Neyret, D, Novy, J, Nowak, Wd, Nukazuka, G, Olshevsky, Ag, Ostrick, M, Panzieri, D, Parsamyan, B, Paul, S, Pekeler, H, Peng, Jc, Pesek, M, Peshekhonov, Dv, Peskova, M, Pierre, N, Platchkov, S, Pochodzalla, J, Polyakov, Va, Pretz, J, Quaresma, M, Quintans, C, Reicherz, G, Riedl, C, Rudnicki, T, Ryabchikov, Di, Rychter, A, Rymbekova, A, Samoylenko, Vd, Sandacz, A, Sarkar, S, Savin, Ia, Sbrizzai, G, Schmeing, S, Schmieden, H, Selyunin, A, Sharko, K, Sinha, L, Slunecka, M, Spulbeck, D, Srnka, A, Steffen, D, Stolarski, M, Subrt, O, Sulc, M, Suzuki, H, Tessaro, S, Tessarotto, F, Thiel, A, Tomsa, J, Tosello, F, Townsend, A, Triloki, T, Tskhay, V, Uhl, S, Valinoti, B, Vauth, A, Veit, Bm, Veloso, J, Ventura, B, Vidon, A, Virius, M, Wagner, M, Wallner, S, Zaremba, K, Zavertyaev, M, Zemko, M, Zemlyanichkina, E, Zhao, Y, and Ziembicki, M

Subjects
PWQ, Structure, pions
Abstract

We study the spin-exotic J(PC)=1(-+) amplitude in single-diffractive dissociation of 190 GeV/c pions into pi(-)pi(-)pi(+) using a hydrogen target and confirm the pi(1)(1600) -> rho(770)pi amplitude, which interferes with a nonresonant 1(-+) amplitude. We demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models and different treatment of the dependence of the amplitudes on the squared four-momentum transfer and we thus reconcile these experimental findings. We study the nonresonant contributions to the pi(-)pi(-)pi(+) final state using pseudodata generated on the basis of a Deck model. Subjecting pseudodata and real data to the same partial-wave analysis, we find good agreement concerning the spectral shape and its dependence on the squared four-momentum transfer for the J(PC)=1(-+) amplitude and also for amplitudes with other J(PC) quantum numbers. We investigate for the first time the amplitude of the pi(-)pi(+) subsystem with J(PC)=1(--) in the 3 pi amplitude with J(PC)=1(-+) employing the novel freed-isobar analysis scheme. We reveal this pi(-)pi(+) amplitude to be dominated by the rho(770) for both the pi(1)(1600) and the nonresonant contribution. These findings largely confirm the underlying assumptions for the isobar model used in all previous partial-wave analyses addressing the J(PC)=1(-+) amplitude.

Published
2022

18. Probing transversity by measuring Λ polarisation in SIDIS

Author

Compass Collaboration, Alexeev, G. D., Balestra, F., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y.-S., Lichtenstadt, J., Lin, P.-J., Longo, R., Ball, M., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Maltsev, A., Mamon, S. A., Marianski, B., Martin, A., Barth, J., Marzec, J., Matoušek, J., Matsuda, T., Mattson, G., Meshcheryakov, G. V., Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu V., Mikhasenko, M., Beck, R., Mitrofanov, E., Miyachi, Y., Moretti, A., Nagaytsev, A., Naim, C., Negrini, T. S., Neyret, D., Nový, J., Nowak, W.-D., Nukazuka, G., Bedfer, Y., Nunes, A. S., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J.-C., Rudnicki, T., Pešek, M., Berenguer Antequera, J., Peshekhonov, D. V., Pešková, M., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, Jörg, Quaresma, M., Quintans, C., Reicherz, G., Bernhard, J., Riedl, C., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sbrizzai, G., Schiavon, P., Bodlak, M., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Smolik, J., Sozzi, F., Srnka, A., Steffen, D., Stolarski, M., Bradamante, F., Subrt, O., Sulc, M., Suzuki, H., Sznajder, P., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Bressan, A., Tskhay, V., Uhl, S., Vasilishin, B. I., Vauth, A., Veit, B. M., Veloso, J., Ventura, B., Vidon, A., Virius, M., Wagner, M., Alexeev, M. G., Burtsev, V. E., Wallner, S., Zaremba, K., Zavada, P., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., Zhao, Y., Ziembicki, M., Chang, W.-C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S.-U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D'Ago, D., Amoroso, A., Dalla Torre, S., Dasgupta, S. S., Dasgupta, S., Denisenko, I., Denisov, O. Yu, Donskov, S. V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R. R., Andrieux, V., Efremov, A., Elia, C., Eremeev, D., Eversheim, P. D., Faccioli, P., Faessler, M., Ferrero, A., Finger, M., Fischer, H., Anosov, V., Flöthner, K. J., Franco, C., Friedrich, J. M., Frolov, V., Garcia Ordòñez, L. G., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Augsten, K., Gnesi, I., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Guskov, A., von Harrach, D., Heitz, R., Hoffmann, M., Augustyniak, W., Horikawa, N., d'Hose, N., Hsieh, C.-Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Azevedo, C. D. R., Kabuß, E., Kang, D.-H., Kaspar, F., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Yu A., Kisselev, Yu., Klein, F., Koivuniemi, J. H., Badełek, B., Kolosov, V. N., Kondo Horikawa, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Krinner, F., Kulinich, Y., Alexeev, Gd, Alexeev, Mg, Amoroso, A, Andrieux, V, Anosov, V, Augsten, K, Augustyniak, W, Azevedo, Cdr, Badelek, B, Balestra, F, Ball, M, Barth, J, Beck, R, Bedfer, Y, Antequera, Jb, Bernhard, J, Bodlak, M, Bradamante, F, Bressan, A, Burtsev, Ve, Chang, Wc, Chatterjee, C, Chiosso, M, Chumakov, Ag, Chung, Su, Cicuttin, A, Correia, Pmm, Crespo, Ml, D'Ago, D, Dalla Torre, S, Dasgupta, S, Denisenko, I, Denisov, Oy, Donskov, Sv, Doshita, N, Dreisbach, C, Dunnweber, W, Dusaev, Rr, Efremov, A, Elia, C, Eremeev, D, Eversheim, Pd, Faccioli, P, Faessler, M, Ferrero, A, Finger, M, Fischer, H, Flothner, Kj, Franco, C, Friedrich, Jm, Frolov, V, Ordonez, Lgg, Gautheron, F, Gavrichtchouk, Op, Gerassimov, S, Giarra, J, Giordano, D, Gnesi, I, Gorzellik, M, Grasso, A, Gridin, A, Perdekamp, Mg, Grube, B, Guskov, A, von Harrach, D, Heitz, R, Hoffmann, M, Horikawa, N, D'Hose, N, Hsieh, Cy, Huber, S, Ishimoto, S, Ivanov, A, Iwata, T, Jandek, M, Jary, V, Joosten, R, Kabuss, E, Kang, Dh, Kaspar, F, Kerbizi, A, Ketzer, B, Khaustov, Gv, Khokhlov, Ya, Kisselev, Y, Klein, F, Koivuniemi, Jh, Kolosovs, Vn, Horikawa, Kk, Konorov, I, Konstantinov, Vf, Kotzinian, Am, Kouznetsov, Om, Koval, A, Kral, Z, Krinner, F, Kulinich, Y, Kunne, F, Kurek, K, Kurjata, Rp, Kveton, A, Lavickova, K, Levorato, S, Lian, Y, Lichtenstadt, J, Lin, N, Longo, R, Lyubovitskij, Ve, Maggiora, A, Magnon, A, Makins, N, Makke, N, Mallot, Gk, Maltsev, A, Mamon, Sa, Marianski, B, Martin, A, Marzec, J, Matousek, J, Matsuda, T, Mattson, G, Meshcheryakov, Gv, Metzger, F, Meyer, M, Meyer, W, Mikhailov, Yv, Mikhasenko, M, Mitrofanov, E, Miyachi, Y, Moretti, A, Nagaytsev, A, Naim, C, Negrini, T, Neyret, D, Novy, J, Nowak, Wd, Nukazuka, G, Nunes, A, Olshevsky, Ag, Ostrick, M, Panzieri, D, Parsamyan, B, Paul, S, Pekeler, H, Peng, Jc, Pesek, M, Peshekhonov, Dv, Peskova, M, Pierre, N, Platchkov, S, Pochodzalla, J, Polyakov, Va, Pretz, J, Quaresma, M, Quintans, C, Reicherz, G, Riedl, C, Rudnicki, T, Ryabchikov, Di, Rychter, A, Rymbekova, A, Samoylenko, Vd, Sandacz, A, Sarkar, S, Savin, Ia, Sbrizzai, G, Schiavon, R, Schmieden, H, Selyunin, A, Sharko, K, Sinha, L, Slunecka, M, Smolik, J, Sozzi, F, Srnka, A, Steffen, D, Stolarski, M, Subrt, O, Sulc, M, Suzuki, H, Sznajder, R, Tessaro, S, Tessarotto, F, Thiel, A, Tomsa, J, Tosello, F, Townsend, A, Tskhay, V, Uhl, S, Vasilishin, Bi, Vauth, A, Veit, Bm, Veloso, J, Ventura, B, Vidon, A, Virius, M, Wagner, M, Wallner, S, Zaremba, K, Zavada, R, Zavertyaev, M, Zemko, M, Zemlyanichkina, E, Zhao, Y, Ziembicki, M, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and COMPASS

Subjects
quark: distribution function, Nuclear and High Energy Physics, QC1-999, polarization: longitudinal, Nuclear Theory, mass spectrum: (anti-p pi+), FOS: Physical sciences, muon: secondary beam, 01 natural sciences, COMPASS, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), mass spectrum: (p pi-), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Quantum chromodynamic, quark: polarization: transverse, ddc:530, 010306 general physics, Nuclear Experiment, hyperon: final state, Antilambda: polarization, deep inelastic scattering: semi-inclusive reaction, 010308 nuclear & particles physics, polarized target: transverse, Physics, High Energy Physics::Phenomenology, Lambda: polarization, nucleon: polarization: transverse, CERN SPS, Lambda polarisation, Transversity, High Energy Physics::Experiment, Quantum chromodynamics, Deep inelastic scattering, muon: polarized beam, spin: asymmetry, Particle Physics - Experiment, experimental results
Abstract

Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SIDIS), the chiral-odd transversity quark distribution functions $h_1^q$ are nowadays well established. Several possible channels to access these functions were originally proposed. One candidate is the measurement of the polarisation of $\Lambda$ hyperons produced in SIDIS off transversely polarised nucleons, where the transverse polarisation of the struck quark might be transferred to the final-state hyperon. In this article, we present the COMPASS results on the transversity-induced polarisation of $\Lambda$ and $\bar{\Lambda}$ hyperons produced in SIDIS off transversely polarised protons. Within the experimental uncertainties, no significant deviation from zero was observed. The results are discussed in the context of different models taking into account previous experimental results on $h_1^u$ and $h_1^d$., Comment: 18 pages, 6 figures

Published
2022

19. Exotic meson <math><mrow><msub><mrow><mi>π</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>(</mo><mn>1600</mn><mo>)</mo></mrow></math> with <math><msup><mi>J</mi><mrow><mi>P</mi><mi>C</mi></mrow></msup><mo>=</mo><msup><mn>1</mn><mrow><mo>−</mo><mo>+</mo></mrow></msup></math> and its decay into <math><mrow><mi>ρ</mi><mo>(</mo><mn>770</mn><mo>)</mo><mi>π</mi></mrow></math>

Author

Alexeev, G. D., Alexeev, M. G., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Badełek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Berenguer Antequera, J., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V. E., Chang, W.C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S.U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D’Ago, D., Dalla Torre, S., Dasgupta, S. S., Dasgupta, S., Denisenko, I., Denisov, O. Yu., Donskov, S. V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R. R., Efremov, A., Eremeev, D., Eversheim, P. D., Faccioli, P., Faessler, M., Finger, M., Fischer, H., Floethner, K., Franco, C., Friedrich, J. M., Frolov, V., Garcia Ordonez, L., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Grüner, M., Guskov, A., Haas, F., von Harrach, D., Heitz, R., Hoffmann, M., Horikawa, N., d’Hose, N., Hsieh, C.Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Kabuß, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Yu. A., Kisselev, Yu., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y.S., Lichtenstadt, J., Lin, P.J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Maltsev, A., Mamon, S. A., Marianski, B., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Mattson, G., Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Miyachi, Y., Moretti, A., Nagaytsev, A., Naim, C., Neyret, D., Nový, J., Nowak, W.D., Nukazuka, G., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J.C., Pešek, M., Peshekhonov, D. V., Pešková, M., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Rudnicki, T., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sbrizzai, G., Schmeing, S., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Spülbeck, D., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Uhl, S., Valinoti, B., Vauth, A., Veit, B. M., Veloso, J., Ventura, B., Vidon, A., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., Zhao, Y., and Ziembicki, M.

Abstract

We study the spin-exotic JPC=1−+ amplitude in single-diffractive dissociation of 190 GeV/c pions into π−π−π+ using a hydrogen target and confirm the π1(1600)→ρ(770)π amplitude, which interferes with a nonresonant 1−+ amplitude. We demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models and different treatment of the dependence of the amplitudes on the squared four-momentum transfer and we thus reconcile these experimental findings. We study the nonresonant contributions to the π−π−π+ final state using pseudodata generated on the basis of a Deck model. Subjecting pseudodata and real data to the same partial-wave analysis, we find good agreement concerning the spectral shape and its dependence on the squared four-momentum transfer for the JPC=1−+ amplitude and also for amplitudes with other JPC quantum numbers. We investigate for the first time the amplitude of the π−π+ subsystem with JPC=1−− in the 3π amplitude with JPC=1−+ employing the novel freed-isobar analysis scheme. We reveal this π−π+ amplitude to be dominated by the ρ(770) for both the π1(1600) and the nonresonant contribution. These findings largely confirm the underlying assumptions for the isobar model used in all previous partial-wave analyses addressing the JPC=1−+ amplitude.

Published
2022

20. Exotic meson π1 (1600) with JPC=1 −+ and its decay into ρ(770)π

Author

Alexeev, G. ???D., Alexeev, M. ???G., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C. ???D. ???R., Bade??ek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Berenguer Antequera, J., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V. ???E., Chang, W. -C., Chatterjee, C., Chiosso, M., Chumakov, A. ???G., Chung, S. -U., Cicuttin, A., Correia, P. ???M. ???M., Crespo, M. ???L., D???ago, D., Dalla Torre, S., Dasgupta, S. ???S., Dasgupta, S., Denisenko, I., Denisov, O. ???Yu., Donskov, S. ???V., Doshita, N., Dreisbach, Ch., D??nnweber, W., Dusaev, R. ???R., Efremov, A., Eremeev, D., Eversheim, P. ???D., Faccioli, P., Faessler, M., Finger, M., Fischer, H., Floethner, K., Franco, C., Friedrich, J. ???M., Frolov, V., Garcia Ordonez, L., Gautheron, F., Gavrichtchouk, O. ???P., Gerassimov, S., Giarra, J., Giordano, D., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Gr??ner, M., Guskov, A., Haas, F., von Harrach, D., Heitz, R., Hoffmann, M., Horikawa, N., D???hose, N., Hsieh, C. -Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Kabu??, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khaustov, G. ???V., Khokhlov, Yu. ???A., Kisselev, Yu., Klein, F., Koivuniemi, J. ???H., Kolosov, V. ???N., Konorov, I., Konstantinov, V. ???F., Kotzinian, A. ???M., Kouznetsov, O. ???M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R. ???P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Lin, P. -J., Longo, R., Lyubovitskij, V. ???E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. ???K., Maltsev, A., Mamon, S. ???A., Marianski, B., Martin, A., Marzec, J., Matou??ek, J., Matsuda, T., Mattson, G., Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu. ???V., Mikhasenko, M., Mitrofanov, E., Miyachi, Y., Moretti, A., Nagaytsev, A., Naim, C., Neyret, D., Nov??, J., Nowak, W. -D., Nukazuka, G., Olshevsky, A. ???G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J. -C., Pe??ek, M., Peshekhonov, D. ???V., Pe??kov??, M., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. ???A., Pretz, J., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Rudnicki, T., Ryabchikov, D. ???I., Rychter, A., Rymbekova, A., Samoylenko, V. ???D., Sandacz, A., Sarkar, S., Savin, I. ???A., Sbrizzai, G., Schmeing, S., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Sp??lbeck, D., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Uhl, S., Valinoti, B., Vauth, A., Veit, B. ???M., Veloso, J., Ventura, B., Vidon, A., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., Zhao, Y., and Ziembicki, M.

Published
2022

21. Exotic meson $\textit{��}_{1}$(1600) with J$^{PC}$ = 1$^{��� +}$ and its decay into $\textit{��}$(770)$\textit{��}$

Author

Alexeev, G. D., Alexeev, M. G., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Bade��ek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Berenguer Antequera, J., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V. E., Chang, W.-C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S.-U., Cicuttin, A., Correia, P. M. M., Crespo, M. L., D���Ago, D., Dalla Torre, S., Dasgupta, S. S., Dasgupta, S., Denisenko, I., Denisov, O. Yu, Donskov, S. V., Doshita, N., Dreisbach, Ch., D��nnweber, W., Dusaev, R. R., Efremov, A., Eremeev, D., Eversheim, P. D., Faccioli, P., Faessler, M., Finger, M., Fischer, H., Floethner, K., Franco, C., Friedrich, J. M., Frolov, V., Garcia Ordonez, L., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, D., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Gr��ner, M., Guskov, A., Haas, F., von Harrach, D., Heitz, R., Hoffmann, M., Horikawa, N., d���Hose, N., Hsieh, C.-Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Kabu��, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Yu A., Kisselev, Yu., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Koval, A., Kral, Z., Krinner, F., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y.-S., Lichtenstadt, J., Lin, P.-J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Maltsev, A., Mamon, S. A., Marianski, B., Martin, A., Marzec, J., Matou��ek, J., Matsuda, T., Mattson, G., Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu V., Mikhasenko, M., Mitrofanov, E., Miyachi, Y., Moretti, A., Nagaytsev, A., Naim, C., Neyret, D., Nov��, J., Nowak, W.-D., Nukazuka, G., Olshevsky, A. G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J.-C., Pe��ek, M., Peshekhonov, D. V., Pe��kov��, M., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J��rg, Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Rudnicki, T., Ryabchikov, D. I., Rychter, A., Rymbekova, A., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sbrizzai, G., Schmeing, S., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Sp��lbeck, D., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Triloki, T., Tskhay, V., Uhl, S., Valinoti, B., Vauth, A., Veit, B. M., Veloso, J., Ventura, B., Vidon, A., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., Zhao, Y., and Ziembicki, M.

Abstract

Physical review / D 105(1), 012005 (2022). doi:10.1103/PhysRevD.105.012005, Published by The American Institute of Physics, Woodbury, NY

Published
2022
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22. Probing transversity by measuring Λ polarisation in SIDIS

Author

Alexeev, G.D., Alexeev, M.G., Amoroso, A., Andrieux, V., Anosov, V., Augsten, K., Augustyniak, W., Azevedo, C.D.R., Badełek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Berenguer Antequera, J., Bernhard, J., Bodlak, M., Bradamante, F., Bressan, A., Burtsev, V.E., Chang, W.-C., Chatterjee, C., Chiosso, M., Chumakov, A.G., Chung, S.-U., Cicuttin, A., Correia, P.M.M., Crespo, M.L., D'Ago, D., Dalla Torre, S., Dasgupta, S.S., Dasgupta, S., Denisenko, I., Denisov, O.Yu., Donskov, S.V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R.R., Efremov, A., Elia, C., Eremeev, D., Eversheim, P.D., Faccioli, P., Faessler, M., Ferrero, A., Finger, M., Finger, M., jr., Fischer, H., Flöthner, K.J., Franco, C., Friedrich, J.M., Frolov, V., Garcia Ordòñez, L.G., Gautheron, F., Gavrichtchouk, O.P., Gerassimov, S., Giarra, J., Giordano, D., Gnesi, I., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Guskov, A., von Harrach, D., Heitz, R., Hoffmann, M., Horikawa, N., d'Hose, N., Hsieh, C.-Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Kabuß, E., Kang, D.-H., Kaspar, F., Kerbizi, A., Ketzer, B., Khaustov, G.V., Khokhlov, Yu.A., Kisselev, Yu., Klein, F., Koivuniemi, J.H., Kolosov, V.N., Kondo Horikawa, K., Konorov, I., Konstantinov, V.F., Kotzinian, A.M., Kouznetsov, O.M., Koval, A., Kral, Z., Krinner, F., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R.P., Kveton, A., Lavickova, K., Levorato, S., Lian, Y.-S., Lichtenstadt, J., Lin, P.-J., Longo, R., Lyubovitskij, V.E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G.K., Maltsev, A., Mamon, S.A., Marianski, B., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Mattson, G., Meshcheryakov, G.V., Metzger, F., Meyer, M., Meyer, W., Mikhailov, Yu.V., Mikhasenko, M., Mitrofanov, E., Miyachi, Y., Moretti, A., Nagaytsev, A., Naim, C., Negrini, T.S., Neyret, D., Nový, J., Nowak, W.-D., Nukazuka, G., Nunes, A.S., Olshevsky, A.G., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Pekeler, H., Peng, J.-C., Pešek, M., Peshekhonov, D.V., Pešková, M., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V.A., Pretz, J., Quaresma, M., Quintans, C., Reicherz, G., Riedl, C., Rudnicki, T., Ryabchikov, D.I., Rychter, A., Rymbekova, A., Samoylenko, V.D., Sandacz, A., Sarkar, S., Savin, I.A., Sbrizzai, G., Schiavon, P., Schmieden, H., Selyunin, A., Sharko, K., Sinha, L., Slunecka, M., Smolik, J., Sozzi, F., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Sznajder, P., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Townsend, A., Tskhay, V., Uhl, S., Vasilishin, B.I., Vauth, A., Veit, B.M., Veloso, J., Ventura, B., Vidon, A., Virius, M., Wagner, M., Wallner, S., Zaremba, K., Zavada, P., Zavertyaev, M., Zemko, M., Zemlyanichkina, E., Zhao, Y., and Ziembicki, M.

Published
2022
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23. Exotic meson π1(1600) with JPC=1−+ and its decay into ρ(770)π

Author

Alexeev, G. D., primary, Alexeev, M. G., additional, Amoroso, A., additional, Andrieux, V., additional, Anosov, V., additional, Augsten, K., additional, Augustyniak, W., additional, Azevedo, C. D. R., additional, Badełek, B., additional, Balestra, F., additional, Ball, M., additional, Barth, J., additional, Beck, R., additional, Bedfer, Y., additional, Berenguer Antequera, J., additional, Bernhard, J., additional, Bodlak, M., additional, Bradamante, F., additional, Bressan, A., additional, Burtsev, V. E., additional, Chang, W.-C., additional, Chatterjee, C., additional, Chiosso, M., additional, Chumakov, A. G., additional, Chung, S.-U., additional, Cicuttin, A., additional, Correia, P. M. M., additional, Crespo, M. L., additional, D’Ago, D., additional, Dalla Torre, S., additional, Dasgupta, S. S., additional, Dasgupta, S., additional, Denisenko, I., additional, Denisov, O. Yu., additional, Donskov, S. V., additional, Doshita, N., additional, Dreisbach, Ch., additional, Dünnweber, W., additional, Dusaev, R. R., additional, Efremov, A., additional, Eremeev, D., additional, Eversheim, P. D., additional, Faccioli, P., additional, Faessler, M., additional, Finger, M., additional, Fischer, H., additional, Floethner, K., additional, Franco, C., additional, Friedrich, J. M., additional, Frolov, V., additional, Garcia Ordonez, L., additional, Gautheron, F., additional, Gavrichtchouk, O. P., additional, Gerassimov, S., additional, Giarra, J., additional, Giordano, D., additional, Gorzellik, M., additional, Grasso, A., additional, Gridin, A., additional, Grosse Perdekamp, M., additional, Grube, B., additional, Grüner, M., additional, Guskov, A., additional, Haas, F., additional, von Harrach, D., additional, Heitz, R., additional, Hoffmann, M., additional, Horikawa, N., additional, d’Hose, N., additional, Hsieh, C.-Y., additional, Huber, S., additional, Ishimoto, S., additional, Ivanov, A., additional, Iwata, T., additional, Jandek, M., additional, Jary, V., additional, Joosten, R., additional, Kabuß, E., additional, Kaspar, F., additional, Kerbizi, A., additional, Ketzer, B., additional, Khaustov, G. V., additional, Khokhlov, Yu. A., additional, Kisselev, Yu., additional, Klein, F., additional, Koivuniemi, J. H., additional, Kolosov, V. N., additional, Konorov, I., additional, Konstantinov, V. F., additional, Kotzinian, A. M., additional, Kouznetsov, O. M., additional, Koval, A., additional, Kral, Z., additional, Krinner, F., additional, Kunne, F., additional, Kurek, K., additional, Kurjata, R. P., additional, Kveton, A., additional, Lavickova, K., additional, Levorato, S., additional, Lian, Y.-S., additional, Lichtenstadt, J., additional, Lin, P.-J., additional, Longo, R., additional, Lyubovitskij, V. E., additional, Maggiora, A., additional, Magnon, A., additional, Makins, N., additional, Makke, N., additional, Mallot, G. K., additional, Maltsev, A., additional, Mamon, S. A., additional, Marianski, B., additional, Martin, A., additional, Marzec, J., additional, Matoušek, J., additional, Matsuda, T., additional, Mattson, G., additional, Metzger, F., additional, Meyer, M., additional, Meyer, W., additional, Mikhailov, Yu. V., additional, Mikhasenko, M., additional, Mitrofanov, E., additional, Miyachi, Y., additional, Moretti, A., additional, Nagaytsev, A., additional, Naim, C., additional, Neyret, D., additional, Nový, J., additional, Nowak, W.-D., additional, Nukazuka, G., additional, Olshevsky, A. G., additional, Ostrick, M., additional, Panzieri, D., additional, Parsamyan, B., additional, Paul, S., additional, Pekeler, H., additional, Peng, J.-C., additional, Pešek, M., additional, Peshekhonov, D. V., additional, Pešková, M., additional, Pierre, N., additional, Platchkov, S., additional, Pochodzalla, J., additional, Polyakov, V. A., additional, Pretz, J., additional, Quaresma, M., additional, Quintans, C., additional, Reicherz, G., additional, Riedl, C., additional, Rudnicki, T., additional, Ryabchikov, D. I., additional, Rychter, A., additional, Rymbekova, A., additional, Samoylenko, V. D., additional, Sandacz, A., additional, Sarkar, S., additional, Savin, I. A., additional, Sbrizzai, G., additional, Schmeing, S., additional, Schmieden, H., additional, Selyunin, A., additional, Sharko, K., additional, Sinha, L., additional, Slunecka, M., additional, Spülbeck, D., additional, Srnka, A., additional, Steffen, D., additional, Stolarski, M., additional, Subrt, O., additional, Sulc, M., additional, Suzuki, H., additional, Tessaro, S., additional, Tessarotto, F., additional, Thiel, A., additional, Tomsa, J., additional, Tosello, F., additional, Townsend, A., additional, Triloki, T., additional, Tskhay, V., additional, Uhl, S., additional, Valinoti, B., additional, Vauth, A., additional, Veit, B. M., additional, Veloso, J., additional, Ventura, B., additional, Vidon, A., additional, Virius, M., additional, Wagner, M., additional, Wallner, S., additional, Zaremba, K., additional, Zavertyaev, M., additional, Zemko, M., additional, Zemlyanichkina, E., additional, Zhao, Y., additional, and Ziembicki, M., additional

Published
2022
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24. Probing transversity by measuring Λ polarisation in SIDIS

Author

Alexeev, G.D., primary, Alexeev, M.G., additional, Amoroso, A., additional, Andrieux, V., additional, Anosov, V., additional, Augsten, K., additional, Augustyniak, W., additional, Azevedo, C.D.R., additional, Badełek, B., additional, Balestra, F., additional, Ball, M., additional, Barth, J., additional, Beck, R., additional, Bedfer, Y., additional, Berenguer Antequera, J., additional, Bernhard, J., additional, Bodlak, M., additional, Bradamante, F., additional, Bressan, A., additional, Burtsev, V.E., additional, Chang, W.-C., additional, Chatterjee, C., additional, Chiosso, M., additional, Chumakov, A.G., additional, Chung, S.-U., additional, Cicuttin, A., additional, Correia, P.M.M., additional, Crespo, M.L., additional, D'Ago, D., additional, Dalla Torre, S., additional, Dasgupta, S.S., additional, Dasgupta, S., additional, Denisenko, I., additional, Denisov, O.Yu., additional, Donskov, S.V., additional, Doshita, N., additional, Dreisbach, Ch., additional, Dünnweber, W., additional, Dusaev, R.R., additional, Efremov, A., additional, Elia, C., additional, Eremeev, D., additional, Eversheim, P.D., additional, Faccioli, P., additional, Faessler, M., additional, Ferrero, A., additional, Finger, M., additional, Fischer, H., additional, Flöthner, K.J., additional, Franco, C., additional, Friedrich, J.M., additional, Frolov, V., additional, Garcia Ordòñez, L.G., additional, Gautheron, F., additional, Gavrichtchouk, O.P., additional, Gerassimov, S., additional, Giarra, J., additional, Giordano, D., additional, Gnesi, I., additional, Gorzellik, M., additional, Grasso, A., additional, Gridin, A., additional, Grosse Perdekamp, M., additional, Grube, B., additional, Guskov, A., additional, von Harrach, D., additional, Heitz, R., additional, Hoffmann, M., additional, Horikawa, N., additional, d'Hose, N., additional, Hsieh, C.-Y., additional, Huber, S., additional, Ishimoto, S., additional, Ivanov, A., additional, Iwata, T., additional, Jandek, M., additional, Jary, V., additional, Joosten, R., additional, Kabuß, E., additional, Kang, D.-H., additional, Kaspar, F., additional, Kerbizi, A., additional, Ketzer, B., additional, Khaustov, G.V., additional, Khokhlov, Yu.A., additional, Kisselev, Yu., additional, Klein, F., additional, Koivuniemi, J.H., additional, Kolosov, V.N., additional, Kondo Horikawa, K., additional, Konorov, I., additional, Konstantinov, V.F., additional, Kotzinian, A.M., additional, Kouznetsov, O.M., additional, Koval, A., additional, Kral, Z., additional, Krinner, F., additional, Kulinich, Y., additional, Kunne, F., additional, Kurek, K., additional, Kurjata, R.P., additional, Kveton, A., additional, Lavickova, K., additional, Levorato, S., additional, Lian, Y.-S., additional, Lichtenstadt, J., additional, Lin, P.-J., additional, Longo, R., additional, Lyubovitskij, V.E., additional, Maggiora, A., additional, Magnon, A., additional, Makins, N., additional, Makke, N., additional, Mallot, G.K., additional, Maltsev, A., additional, Mamon, S.A., additional, Marianski, B., additional, Martin, A., additional, Marzec, J., additional, Matoušek, J., additional, Matsuda, T., additional, Mattson, G., additional, Meshcheryakov, G.V., additional, Metzger, F., additional, Meyer, M., additional, Meyer, W., additional, Mikhailov, Yu.V., additional, Mikhasenko, M., additional, Mitrofanov, E., additional, Miyachi, Y., additional, Moretti, A., additional, Nagaytsev, A., additional, Naim, C., additional, Negrini, T.S., additional, Neyret, D., additional, Nový, J., additional, Nowak, W.-D., additional, Nukazuka, G., additional, Nunes, A.S., additional, Olshevsky, A.G., additional, Ostrick, M., additional, Panzieri, D., additional, Parsamyan, B., additional, Paul, S., additional, Pekeler, H., additional, Peng, J.-C., additional, Pešek, M., additional, Peshekhonov, D.V., additional, Pešková, M., additional, Pierre, N., additional, Platchkov, S., additional, Pochodzalla, J., additional, Polyakov, V.A., additional, Pretz, J., additional, Quaresma, M., additional, Quintans, C., additional, Reicherz, G., additional, Riedl, C., additional, Rudnicki, T., additional, Ryabchikov, D.I., additional, Rychter, A., additional, Rymbekova, A., additional, Samoylenko, V.D., additional, Sandacz, A., additional, Sarkar, S., additional, Savin, I.A., additional, Sbrizzai, G., additional, Schiavon, P., additional, Schmieden, H., additional, Selyunin, A., additional, Sharko, K., additional, Sinha, L., additional, Slunecka, M., additional, Smolik, J., additional, Sozzi, F., additional, Srnka, A., additional, Steffen, D., additional, Stolarski, M., additional, Subrt, O., additional, Sulc, M., additional, Suzuki, H., additional, Sznajder, P., additional, Tessaro, S., additional, Tessarotto, F., additional, Thiel, A., additional, Tomsa, J., additional, Tosello, F., additional, Townsend, A., additional, Tskhay, V., additional, Uhl, S., additional, Vasilishin, B.I., additional, Vauth, A., additional, Veit, B.M., additional, Veloso, J., additional, Ventura, B., additional, Vidon, A., additional, Virius, M., additional, Wagner, M., additional, Wallner, S., additional, Zaremba, K., additional, Zavada, P., additional, Zavertyaev, M., additional, Zemko, M., additional, Zemlyanichkina, E., additional, Zhao, Y., additional, and Ziembicki, M., additional

Published
2021
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25. High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons.

Author

Alexeev GD, Alexeev MG, Alice C, Amoroso A, Andrieux V, Anosov V, Asatryan S, Augsten K, Augustyniak W, Azevedo CDR, Badelek B, Barth J, Beck R, Beckers J, Bedfer Y, Bernhard J, Bodlak M, Bradamante F, Bressan A, Chang WC, Chatterjee C, Chiosso M, Chumakov AG, Chung SU, Cicuttin A, Correia PMM, Crespo ML, D'Ago D, Dalla Torre S, Dasgupta SS, Dasgupta S, Delcarro F, Denisenko I, Denisov OY, Donskov SV, Doshita N, Dreisbach C, Dünnweber W, Dusaev RR, Ecker D, Eremeev D, Faccioli P, Faessler M, Finger M, Finger M, Fischer H, Flöthner KJ, Florian W, Friedrich JM, Frolov V, Garcia Ordòñez LG, Gautheron F, Gavrichtchouk OP, Gerassimov S, Giarra J, Giordano D, Grasso A, Gridin A, Grosse Perdekamp M, Grube B, Grüner M, Guskov A, Haas P, von Harrach D, Hoffmann M, Hoghmrtsyan A, d'Hose N, Hsieh CY, Huber S, Ishimoto S, Ivanov A, Iwata T, Jary V, Joosten R, Kabuß E, Kaspar F, Kerbizi A, Ketzer B, Khatun A, Khaustov GV, Klasek T, Klein F, Koivuniemi JH, Kolosov VN, Kondo Horikawa K, Konorov I, Konstantinov VF, Korzenev AY, Kotzinian AM, Kouznetsov OM, Koval A, Kral Z, Krinner F, Kunne F, Kurek K, Kurjata RP, Kveton A, Lavickova K, Levorato S, Lian YS, Lichtenstadt J, Lin PJ, Longo R, Lyubovitskij VE, Maggiora A, Magnon A, Makke N, Mallot GK, Maltsev A, Martin A, Marzec J, Matoušek J, Matsuda T, Mattson G, Menezes Pires C, Metzger F, Meyer M, Meyer W, Mikhailov YV, Mikhasenko M, Mitrofanov E, Miura D, Miyachi Y, Molina R, Moretti A, Movsisyan A, Nagaytsev A, Neyret D, Niemiec M, Nový J, Nowak WD, Nukazuka G, Olshevsky AG, Ostrick M, Panzieri D, Parsamyan B, Paul S, Pekeler H, Peng JC, Pešek M, Peshekhonov DV, Pešková M, Platchkov S, Pochodzalla J, Polyakov VA, Quaresma M, Quintans C, Reicherz G, Riedl C, Ryabchikov DI, Rychter A, Rymbekova A, Samoylenko VD, Sandacz A, Sarkar S, Savin IA, Sbrizzai G, Schmieden H, Selyunin A, Sharko K, Sinha L, Spülbeck D, Srnka A, Stolarski M, Sulc M, Suzuki H, Takanashi Y, Tessaro S, Tessarotto F, Thiel A, Tosello F, Townsend A, Triloki T, Tskhay V, Valinoti B, Veit BM, Veloso JFCA, Ventura B, Vijayakumar A, Virius M, Wagner M, Wallner S, Zaremba K, Zavertyaev M, Zemko M, Zemlyanichkina E, and Ziembicki M

Abstract

New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarized ^{6}LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 GeV muon beam at CERN, statistically balancing the existing data on transversely polarized proton targets. The first results from about two-thirds of the new data have total uncertainties smaller by up to a factor of three compared to the previous deuteron measurements. Using all the COMPASS proton and deuteron results, both the transversity and the Sivers distribution functions of the u and d quark, as well as the tensor charge in the measured x range are extracted. In particular, the accuracy of the d quark results is significantly improved.

Published
2024
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26. Final COMPASS Results on the Transverse-Spin-Dependent Azimuthal Asymmetries in the Pion-Induced Drell-Yan Process.

Author

Alexeev GD, Alexeev MG, Alice C, Amoroso A, Andrieux V, Anosov V, Augsten K, Augustyniak W, Azevedo CDR, Badelek B, Barth J, Beck R, Beckers J, Bedfer Y, Bernhard J, Bodlak M, Bradamante F, Bressan A, Chang WC, Chatterjee C, Chiosso M, Chumakov AG, Chung SU, Cicuttin A, Correia PMM, Crespo ML, D'Ago D, Dalla Torre S, Dasgupta SS, Dasgupta S, Delcarro F, Denisenko I, Denisov OY, Donskov SV, Doshita N, Dreisbach C, Dünnweber W, Dusaev RR, Ecker D, Eremeev D, Faccioli P, Faessler M, Finger M, Finger M, Fischer H, Flöthner KJ, Florian W, Friedrich JM, Frolov V, Garcia Ordòñez LG, Gautheron F, Gavrichtchouk OP, Gerassimov S, Giarra J, Giordano D, Grasso A, Gridin A, Grosse Perdekamp M, Grube B, Grüner M, Guskov A, Haas P, von Harrach D, Heitz R, Hoffmann M, d'Hose N, Hsieh CY, Huber S, Ishimoto S, Ivanov A, Iwata T, Jary V, Joosten R, Kabuß E, Kaspar F, Kerbizi A, Ketzer B, Khatun A, Khaustov GV, Klein F, Koivuniemi JH, Kolosov VN, Kondo Horikawa K, Konorov I, Konstantinov VF, Korzenev AY, Kotzinian AM, Kouznetsov OM, Koval A, Kral Z, Krinner F, Kunne F, Kurek K, Kurjata RP, Kveton A, Lavickova K, Levorato S, Lian YS, Lichtenstadt J, Lin PJ, Longo R, Lyubovitskij VE, Maggiora A, Magnon A, Makke N, Mallot GK, Maltsev A, Martin A, Marzec J, Matoušek J, Matsuda T, Mattson G, Menezes Pires C, Metzger F, Meyer M, Meyer W, Mikhailov YV, Mikhasenko M, Mitrofanov E, Miura D, Miyachi Y, Molina R, Moretti A, Nagaytsev A, Neyret D, Niemiec M, Nový J, Nowak WD, Nukazuka G, Olshevsky AG, Ostrick M, Panzieri D, Parsamyan B, Paul S, Pekeler H, Peng JC, Pešek M, Peshekhonov DV, Pešková M, Platchkov S, Pochodzalla J, Polyakov VA, Quaresma M, Quintans C, Reicherz G, Riedl C, Ryabchikov DI, Rychter A, Rymbekova A, Samoylenko VD, Sandacz A, Sarkar S, Savada T, Savin IA, Sbrizzai G, Schmieden H, Selyunin A, Sharko K, Sinha L, Spülbeck D, Srnka A, Stolarski M, Sulc M, Suzuki H, Tessaro S, Tessarotto F, Thiel A, Tosello F, Townsend A, Triloki T, Tskhay V, Valinoti B, Veit BM, Veloso JFCA, Ventura B, Vijayakumar A, Virius M, Wagner M, Wallner S, Zaremba K, Zavertyaev M, Zemko M, Zemlyanichkina E, and Ziembicki M

Abstract

The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190  GeV/c π^{-} beam impinging on a transversely polarized ammonia target. Combining the data of both years, we present final results on the amplitudes of five azimuthal modulations, which correspond to transverse-spin-dependent azimuthal asymmetries (TSAs) in the dimuon production cross section. Three of them probe the nucleon leading-twist Sivers, transversity, and pretzelosity transverse-momentum dependent (TMD) parton distribution functions (PDFs). The other two are induced by subleading effects. These TSAs provide unique new inputs for the study of the nucleon TMD PDFs and their universality properties. In particular, the Sivers TSA observed in this measurement is consistent with the fundamental QCD prediction of a sign change of naive time-reversal-odd TMD PDFs when comparing the Drell-Yan process with deep inelastic scattering. Also, within the context of model predictions, the observed transversity TSA is consistent with the expectation of a sign change for the Boer-Mulders function.

Published
2024
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