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1,429 results on '"Lojek A"'

1. A first extraction of the weak magnetism form factor and Fierz interference term from the $^{114}$In $\rightarrow$ $^{114}$Sn Gamow-Teller transition

Author

De Keukeleere, L., Rozpedzik, D., Severijns, N., Bodek, K., Hayen, L., Lojek, K., Perkowski, M., and Vanlangendonck, S.

Subjects
Nuclear Experiment
Abstract

Spectrum shape measurements in nuclear $\beta$ decay can be used to test physics beyond the Standard Model with results being complementary to high-energy collider experiments. In particular, Beyond Standard Model sensitivity of the weak interaction is expressed through the so-called Fierz interference term. Additionally, the $\beta$ spectrum shape is a useful tool to probe Standard Model effects, among which the most prominent is \textit{weak magnetism}, a higher-order recoil correction induced by nuclear pion exchange. To study effects in the $\beta$ spectrum shape at a precision level competitive with the LHC, a new spectrometer was designed and built. It consists of a 3D low-pressure gas electron tracker and a plastic scintillator used for triggering the data acquisition and recording the $\beta$ particle energy. In this Letter, the results from $\beta$ spectrum shape measurements on the allowed Gamow-Teller transition $^{114}\text{In} \rightarrow ^{114}\text{Sn}$ are presented, including a first extraction of the weak magnetism form factor in the high nuclear mass range and a new estimate of the $90\%$ confidence interval for the Fierz interference term., Comment: 6 pages, 2 figures

Published
2024

3. Exposure of iPSC-derived human microglia to brain substrates enables the generation and manipulation of diverse transcriptional states in vitro

Author

Dolan, Michael-John, Therrien, Martine, Jereb, Saša, Kamath, Tushar, Gazestani, Vahid, Atkeson, Trevor, Marsh, Samuel E, Goeva, Aleksandrina, Lojek, Neal M, Murphy, Sarah, White, Cassandra M, Joung, Julia, Liu, Bingxu, Limone, Francesco, Eggan, Kevin, Hacohen, Nir, Bernstein, Bradley E, Glass, Christopher K, Leinonen, Ville, Blurton-Jones, Mathew, Zhang, Feng, Epstein, Charles B, Macosko, Evan Z, and Stevens, Beth

Subjects
Biochemistry and Cell Biology, Biological Sciences, Brain Disorders, Stem Cell Research, Human Genome, Genetics, Neurosciences, Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD), Aging, Alzheimer's Disease, Dementia, Acquired Cognitive Impairment, Neurodegenerative, Aetiology, 2.1 Biological and endogenous factors, 1.1 Normal biological development and functioning, Underpinning research, Neurological, Generic health relevance, Humans, Microglia, Induced Pluripotent Stem Cells, Alzheimer Disease, Brain, Neurodegenerative Diseases, Immunology, Biochemistry and cell biology
Abstract

Microglia, the macrophages of the brain parenchyma, are key players in neurodegenerative diseases such as Alzheimer's disease. These cells adopt distinct transcriptional subtypes known as states. Understanding state function, especially in human microglia, has been elusive owing to a lack of tools to model and manipulate these cells. Here, we developed a platform for modeling human microglia transcriptional states in vitro. We found that exposure of human stem-cell-differentiated microglia to synaptosomes, myelin debris, apoptotic neurons or synthetic amyloid-beta fibrils generated transcriptional diversity that mapped to gene signatures identified in human brain microglia, including disease-associated microglia, a state enriched in neurodegenerative diseases. Using a new lentiviral approach, we demonstrated that the transcription factor MITF drives a disease-associated transcriptional signature and a highly phagocytic state. Together, these tools enable the manipulation and functional interrogation of human microglial states in both homeostatic and disease-relevant contexts.

Published
2023

4. A high-resolution pixel silicon Vertex Detector for open charm measurements with the \NASixtyOne spectrometer at the CERN SPS

Author

Aduszkiewicz, A., Bajda, M., Baszczyk, M., Bryliński, W., Brzychczyk, J., Deveaux, M., Dorosz, P., Di Luise, S., Feofilov, G., Gazdzicki, M., Igolkin, S., Jabłoński, M., Kovalenko, V., Koziel, M., Kucewicz, W., Larsen, D., Lazareva, T., Łojek, K., Majka, Z., Martinengo, P., Merzlaya, A., Mik, L., Płaneta, R., Staszel, P., Suljic, M., Tefelski, D., and Vechernin, V.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The study of open charm meson production provides an efficient tool for the investigation of the properties of hot and dense matter formed in nucleus-nucleus collisions. The interpretation of the existing di-muon data from the CERN SPS suffers from a lack of knowledge on the mechanism and properties of the open charm particle production. Due to this, the heavy-ion programme of the \NASixtyOne experiment at the CERN SPS has been extended by precise measurements of charm hadrons with short lifetimes. A new Vertex Detector for measurements of the rare processes of open charm production in nucleus-nucleus collisions was designed to meet the challenges of track registration and high resolution in primary and secondary vertex reconstruction. A small-acceptance version of the vertex detector was installed in 2016 and tested with Pb+Pb collisions at 150\AGeVc. It was also operating during the physics data taking on Xe+La and Pb+Pb collisions at 150\AGeVc conducted in 2017 and 2018. This paper presents the detector design and construction, data calibration, event reconstruction, and analysis procedure., Comment: 13 pages, 21 figures, Fixed Acknowledgment

Published
2023
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5. In-situ measurement of the velocity spectrum of ultracold neutrons and its evolution using an oscillating detector

Author

Rozpedzik, D., Bodek, K., Kirch, K., Lauss, B., Lojek, K., Rienaecker, I., Schmidt-Wellenburg, P., and Zsigmond, G.

Subjects
Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

Ultracold neutrons (UCNs) are used in experiments investigating fundamental interactions, testing the Standard Model of particle physics and searching for phenomena beyond it. Knowledge of the energy spectrum of UCNs is very often a key ingredient to determine the systematic effects in precision measurements utilizing UCNs. The proposed novel method allows for the in-situ measurements of the UCN velocity distribution and its time evolution. In addition, the proposed UCN spectrometer can be a handy diagnostic tool for monitoring the spectrum in critical places in the UCN transport system connecting an UCN source with experiments. In this paper, we show the results from the measurements performed at the Paul Scherrer Institute's UCN source., Comment: 8 pages, 7 figures

Published
2022

6. Hydrodynamic exposure – on the quest to deriving quantitative metrics for mariculture sites

Author

Oliver Lojek, Nils Goseberg, Heidi Moe Føre, Tobias Dewhurst, Thea Bölker, Kevin Gerald Haesman, Bela H. Buck, David W. Fredriksson, and Samuel Rickerich

Subjects
aquaculture siting, degree of exposure, hydrodynamic loading, aquaculture technology, aquaculture engineering, quantitative assessment, Aquaculture. Fisheries. Angling, SH1-691
Abstract

This work attempts to define metrics for hydrodynamic exposure, using known oceanographic variables to provide a universal site assessment method for mariculture structures. Understanding environmental conditions driving open-ocean mariculture siting is crucial in establishing consistent ocean governance, minimizing adverse environmental impacts, and facilitating economically sustainable farm operations. To provide a metric of oceanic conditions and associated requirements for structural design and operation of aquaculture systems, six Exposure Indices (EI) are proposed that consider physical energy levels related to hydrodynamic forces at a site. Four of the proposed indices consider only environmental conditions, while the other two also consider the dimensions of the gear that is exposed to the external loads. These indices are: Exposure Velocity (EV), Exposure Velocity at Reference Depth (EVRD), Specific Exposure Energy (SEE), Depth-integrated Energy Flux (DEF), Structure-centered Depth-integrated Energy (SDE), and a Structure-centered Drag-to-Buoyancy Ratio (SDBR). While these indices are derived with a focus on aquaculture structures, they may also have applications for estimating biological stressors and operational challenges. The proposed exposure indices were evaluated for a range of known aquaculture sites around the world. A sensitivity analysis was conducted that quantified the relationship between the exposure indices and storm event return period. At a regional scale, hindcast numerical data for the German Bight combined with calculations of 50-year extreme values were used to calculate and map each proposed index spatially. Resulting maps showed that exposure is not simply a function of distance from shore. The six indices show plausible performance regarding the objective assessment of aquaculture sites. The authors herein present the indices to the aquaculture and ocean engineering communities for discussion, application, and potential adoption of one or more of the proposed indices.

Published
2024
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7. Gas electron tracking detector for beta decay experiments

Author

Rozpedzik, D., De Keukeleere, L., Bodek, K., Hayen, L., Lojek, K., Perkowski, M., and Severijns, N.

Subjects
Physics - Instrumentation and Detectors
Abstract

For identification and 3D-tracking of low-energy electrons a new type of gas-based detector was designed that minimizes scattering and energy loss. The current version of the detector is a combination of a plastic scintillator, serving as a trigger source and energy detector, and a hexagonally structured multi-wire drift chamber (MWDC), filled with a mixture of helium and isobutane gas. The drift time information is used to track particles in the plane perpendicular to the wires, while a charge division technique provides spatial information along the wires. The gas tracker was successfully used in the miniBETA project as a beta spectrometer for a measurement of the weak magnetism form factor in nuclear beta decay. The precision of the three-dimensional electron tracking, in combination with low-mass, low-Z materials and identification of backscattering from scintillator, facilitated a reduction of the main systematics effects. At certain conditions, a spatial resolution better than 0.5 mm was obtained in the plane perpendicular to the wires, while resolutions of about 6 mm were achieved along wires. Thanks to precise tracking information, it is possible to eliminate electrons and other particles not originating from the desired decay with high efficiency. Additionally, using the coincidence between MWDC and scintillator, background from gamma emission typically accompanying radioactive decays, was highly suppressed. An overview of different event topologies is presented together with the tracker's ability to correctly recognize them. The analysis is supported by Monte Carlo simulations using Geant4 and Garfield++ packages. Finally, the preliminary results from the 114In spectrum study are presented., Comment: 5 pages, 3 figures, accepted for publication in JINST - PSD12(2021)

Published
2022
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9. $K^{*}(892)^0$ meson production in inelastic $p+p$ interactions at 40 and 80 GeV/$c$ beam momenta measured by NA61/SHINE at the CERN SPS

Author

Collaboration, NA61/SHINE, Acharya, A., Adhikary, H., Allison, K. K., Amin, N., Andronov, E. V., Antićić, T., Arsene, I. -C., Baszczyk, M., Battagia, D., Bhosale, S., Blondel, A., Bogomilov, M., Bondar, Y., Bostan, N., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Friend, M., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Izvestnyy, A., Johnson, S. R., Kadija, K., Kargin, N., Karpushkin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Kolesnikov, R., Kolev, D., Korzenev, A., Koshio, J., Kovalenko, V. N., Kowalski, S., Kozłowski, B., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., László, A., Lewicki, M., Łojek, K., Lykasov, G., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Makhnev, A., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Matyja, A., Melkumov, G. L., Merzlaya, A., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Nagai, Y., Nakadaira, T., Naskręt, M., Ozvenchuk, V., Panova, O., Paolone, V., Petukhov, O., Pidhurskyi, I., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadhu, S., Sakashita, K., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Tveter, T. S., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Volkov, V., Wickremasinghe, A., Wójcik, K., Wyszyński, O., Zaitsev, A., Zimmerman, E. D., Zviagina, A., and Zwaska, R.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

Measurements of $K^{*}(892)^0$ resonance production via its $K^{+}\pi^{-}$ decay mode in inelastic $p+p$ collisions at beam momenta 40 and 80 GeV/$c$ ($\sqrt{s_{NN}}=8.8$ and 12.3 GeV) are presented. The data were recorded by the NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The \textit{template} method was used to extract the $K^{*}(892)^0$ signal. Transverse momentum and rapidity spectra were obtained. The mean multiplicities of $K^{*}(892)^0$ mesons were found to be $(35.1 \pm 1.3 \mathrm{(stat)} \pm 3.6 \mathrm{(sys)) \cdot 10^{-3}}$ at 40 GeV/$c$ and $(58.3 \pm 1.9 \mathrm{(stat)} \pm 4.9 \mathrm{(sys)) \cdot 10^{-3}}$ at 80 GeV/$c$. The NA61/SHINE results are compared with the EPOS1.99 and Hadron Resonance Gas models as well as with world data. The transverse mass spectra of $K^{*}(892)^0$ mesons and other particles previously reported by NA61/SHINE were fitted within the Blast-Wave model. The transverse flow velocities are close to 0.1--0.2 of the speed of light and are significantly smaller than the ones determined in heavy nucleus-nucleus interactions at the same beam momenta., Comment: version published in Eur. Phys. J. C

Published
2021
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13. Phenotypic Screening of Prospective Analgesics Among FDA‐Approved Compounds using an iPSC‐Based Model of Acute and Chronic Inflammatory Nociception

Author

Bryan James Black, Rasha El Ghazal, Neal Lojek, Victoria Williams, Jai Singh Rajput, and Jennifer M. Lawson

Subjects
drug screening, hiPSC tissue model, inflammatory nociception, microelectrode arrays, phenotypic screening, Science
Abstract

Abstract Classical target‐based drug screening is low‐throughput, largely subjective, and costly. Phenotypic screening based on in vitro models is increasingly being used to identify candidate compounds that modulate complex cell/tissue functions. Chronic inflammatory nociception, and subsequent chronic pain conditions, affect peripheral sensory neuron activity (e.g., firing of action potentials) through myriad pathways, and remain unaddressed in regard to effective, non‐addictive management/treatment options. Here, a chronic inflammatory nociception model is demonstrated based on induced pluripotent stem cell (iPSC) sensory neurons and glia, co‐cultured on microelectrode arrays (MEAs). iPSC sensory co‐cultures exhibit coordinated spontaneous extracellular action potential (EAP) firing, reaching a stable baseline after ≈27 days in vitro (DIV). Spontaneous and evoked EAP metrics are significantly modulated by 24‐h incubation with tumor necrosis factor‐alpha (TNF‐α), representing an inflammatory phenotype. Compared with positive controls (lidocaine), this model is identified as an “excellent” stand‐alone assay based on a modified Z’ assay quality metric. This model is then used to screen 15 cherry‐picked, off‐label, Food and Drug Administration (FDA)‐approved compounds; 10 of 15 are identified as “hits”. Both hits and “misses” are discussed in turn. In total, this data suggests that iPSC sensory co‐cultures on MEAs may represent a moderate‐to‐high‐throughput assay for drug discovery targeting inflammatory nociception.

Published
2024
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14. $K^{0}_{S}$ meson production in inelastic $\textit{p+p}$ interactions at 158 GeV/c beam momentum measured by NA61/SHINE at the CERN SPS

Author

Acharya, A., Adhikary, H., Allison, K. K., Amin, N., Andronov, E. V., Antičić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blonde, A., Bogomilov, M., Bondar, Y., Brandin, A., Bravar, A., Brylinski, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Enge, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gazdzicki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Kozie, M., Kozłowski, B., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Mackowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Nagai, Y., Naskret, M., Ozvenchuk, V., Panova, O., Paolone, V., Petukhov, O., Pidhurskyi, I., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadhu, S., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Unger, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Wójcik, K., Wyszynski, O., Zaitsev, A., Zimmerman, E. D., and Zwaska, R.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The production of $K^{0}_{S}$ mesons in inelastic $\textit{p+p}$ collisions at beam momentum 158 GeV/c ($\sqrt{s_{NN}}=17.3$ GeV) was measured with the NA61/SHINE spectrometer at the CERN Super Proton Synchrotron. Double-differential distributions were obtained in transverse momentum and rapidity. The mean multiplicity of $K^{0}_{S}$ was determined to be $0.162 \pm 0.001 (stat.) \pm 0.011 (sys.)$. The results on $K^{0}_{S}$ production are compared with model predictions (EPOS 1.99, SMASH 2.0, PHSD and UrQMD 3.4 models) as well as with published world data.

Published
2021
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15. Measurements of $\Xi\left(1530\right)^{0}$ and $\overline{\Xi}\left(1530\right)^{0}$ production in proton-proton interactions at $\sqrt{s_{NN}}$ = 17.3 GeV in the NA61/SHINE experiment

Author

Acharya, A., Adhikary, H., Allison, K. K., Amin, N., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, Y. Balkova M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Kozłowski, B., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Pidhurskyi, I., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadhu, S., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Urbaniak, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Wójcik, K., Wyszyński, O., Zaitsev, A., Zimmerman, E. D., and Zwaska, R.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

Double-differential yields of $\Xi\left(1530\right)^{0}$ and $\overline{\Xi}\left(1530\right)^{0}$ resonances produced in \pp interactions were measured at a laboratory beam momentum of 158~\GeVc. This measurement is the first of its kind in \pp interactions below LHC energies. It was performed at the CERN SPS by the \NASixtyOne collaboration. Double-differential distributions in rapidity and transverse momentum were obtained from a sample of 26$\cdot$10$^6$ inelastic events. The spectra are extrapolated to full phase space resulting in mean multiplicity of $\Xi\left(1530\right)^{0}$ (6.73 $\pm$ 0.25 $\pm$ 0.67)$\times10^{-4}$ and $\overline{\Xi}\left(1530\right)^{0}$ (2.71 $\pm$ 0.18 $\pm$ 0.18)$\times10^{-4}$. The rapidity and transverse momentum spectra and mean multiplicities were compared to predictions of string-hadronic and statistical model calculations.

Published
2021
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16. Spectra and mean multiplicities of $\pi^{-}$ in $central$ ${}^{40}$Ar+${}^{45}$Sc collisions at 13$A$, 19$A$, 30$A$, 40$A$, 75$A$ and 150$A$ GeV/$c$ beam momenta measured by the NA61/SHINE spectrometer at the CERN SPS

Author

collaboration, NA61/SHINE, Acharya, A., Adhikary, H., Allison, K. K., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Kozłowski, B., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Pidhurskyi, I., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadhu, S., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Wójcik, K., Wyszyński, O., Zaitsev, A., Zimmerman, E. D., and Zwaska, R.

Subjects
High Energy Physics - Experiment
Abstract

The physics goal of the strong interaction program of the NA61/SHINE experiment at the CERN Super Proton Synchrotron (SPS) is to study the phase diagram of hadronic matter by a scan of particle production in collisions of nuclei with various sizes at a set of energies covering the SPS energy range. This paper presents differential inclusive spectra of transverse momentum, transverse mass and rapidity of $\pi^{-}$ mesons produced in $central$ ${}^{40}$Ar+${}^{45}$Sc collisions at beam momenta of 13$A$, 19$A$, 30$A$, 40$A$, 75$A$ and 150$A$ GeV/$c$. Energy and system size dependence of parameters of these distributions -- mean transverse mass, the inverse slope parameter of transverse mass spectra, width of the rapidity distribution and mean multiplicity -- are presented and discussed. Furthermore, the dependence of the ratio of the mean number of produced pions to the mean number of wounded nucleons on the collision energy was derived. The results are compared to predictions of several models., Comment: 40 pages, 24 figures. arXiv admin note: text overlap with arXiv:2008.06277; added the NA61/SHINE collaboration to authors and missing grant number

Published
2021

17. Measurement of the production cross section of 31 GeV/$c$ protons on carbon via beam attenuation in a 90-cm-long target

Author

Collaboration, NA61/SHINE, Acharya, A., Adhikary, H., Aduszkiewicz, A., Allison, K. K., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Kozłowski, B., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadhu, S., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Wojcik, K., Wyszyński, O., Zaitsev, A., Zimmerman, E. D., and Zwaska, R.

Subjects
High Energy Physics - Experiment
Abstract

The production cross section of 30.92 GeV/$c$ protons on carbon is measured by the NA61/SHINE spectrometer at the CERN SPS by means of beam attenuation in a copy (replica) of the 90-cm-long target of the T2K neutrino oscillation experiment. The employed method for direct production cross-section estimation minimizes model corrections for elastic and quasi-elastic interactions. The obtained production cross section is $\sigma_\mathrm{prod}~=~227.6~\pm~0.8\mathrm{(stat)}~_{-~3.2}^{+~1.9}\mathrm{(sys)}~{-~0.8}\mathrm{(mod)}$ mb. It is in agreement with previous NA61/SHINE results obtained with a thin carbon target, while providing improved precision with a total fractional uncertainty of less than 2$\%$. This direct measurement is performed to reduce the uncertainty on the T2K neutrino flux prediction associated with the re-weighting of the interaction rate of neutrino-yielding hadrons., Comment: 20 pages, 10 figures

Published
2020
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18. Measurements of $\pi^\pm$, $K^\pm$, $p$ and $\bar{p}$ spectra in $^7$Be+$^9$Be collisions at beam momenta from 19$A$ to 150$A$ GeV/$c$ with the NA61/SHINE spectrometer at the CERN SPS

Author

Collaboration, NA61/SHINE, Acharya, A., Adhikary, H., Aduszkiewicz, A., Allison, K. K., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Kozłowski, B., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadhu, S., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wójcik, K., Wyszyński, O., Zimmerman, E. D., and Zwaska, R.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The NA61/SHINE experiment at the CERN Super Proton Synchrotron (SPS) studies the onset of deconfinement in hadron matter by a scan of particle production in collisions of nuclei with various sizes at a set of energies covering the SPS energy range. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions and mean multiplicities of $\pi^\pm$, $K^\pm$, $p$ and $\bar{p}$ produced in the 20$\%$ most $central$ $^7$Be+$^9$Be collisions at beam momenta of 19$A$, 30$A$, 40$A$, 75$A$ and 150$A$ GeV/$c$. The energy dependence of the $K^\pm$/$\pi^\pm$ ratios as well as of inverse slope parameters of the $K^\pm$ transverse mass distributions are close to those found in inelastic $p$+$p$ reactions. The new results are compared to the world data on $p$+$p$ and Pb+Pb collisions as well as to predictions of the EPOS, UrQMD, AMPT, PHSD and SMASH models., Comment: 52 pages, 38 figures

Published
2020
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19. Measurements of multiplicity fluctuations of identified hadrons in inelastic proton-proton interactions at the CERN Super Proton Synchrotron

Author

Collaboration, NA61/SHINE, Acharya, A., Adhikary, H., Aduszkiewicz, A., Allison, K. K., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Pidhurskyi, I., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadhu, S., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Wojcik, K., Wyszyński, O., Zaitsev, A., Zimmerman, E. D., and Zwaska, R.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

Measurements of multiplicity fluctuations of identified hadrons produced in inelastic p+p interactions at 31, 40, 80, and 158~\GeVc beam momentum are presented. Three different measures of multiplicity fluctuations are used: the scaled variance $\omega$ and strongly intensive measures $\Sigma$ and $\Delta$. These fluctuation measures involve second and first moments of joint multiplicity distributions. Data analysis is performed using the Identity method which corrects for incomplete particle identification. Strongly intensive quantities are calculated in order to allow for a direct comparison to corresponding results on nucleus-nucleus collisions. The results for different hadron types are shown as a function of collision energy. A comparison with predictions of string-resonance Monte-Carlo models: Epos, Smash and Venus, is also presented., Comment: 32 pages, 14 figures

Published
2020
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20. Measurements of $\pi^-$ production in $^7$Be+$^9$Be collisions at beam momenta from 19$A$ to 150$A$GeV/$c$ in the NA61/SHINE experiment at the CERN SPS

Author

Collaboration, NA61/SHINE, Acharya, A., Adhikary, H., Aduszkiewicz, A., Allison, K. K., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadhu, S., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wojcik, K., Wyszyński, O., Zimmerman, E. D., and Zwaska, R.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

The NA61/SHINE collaboration studies at the CERN Super Proton Synchrotron (SPS) the onset of deconfinement in hadronic matter by the measurement of particle production in collisions of nuclei with various sizes at a set of energies covering the SPS energy range. This paper presents results on inclusive double-differential spectra and mean multiplicities of $\pi^{-}$ mesons produced in the 5\% most \textit{central} $^7$Be+$^9$Be collisions at beam momenta of 19$A$, 30$A$, 40$A$, 75$A$ and 150$A$ GeV/$c$ obtained by the so-called $h^-$ method which does not require any particle identification. The shape of the transverse mass spectra differs from the shapes measured in central Pb+Pb collisions and inelastic p+p interactions. The normalized width of the rapidity distribution decreases with increasing collision energy and is in between the results for inelastic nucleon-nucleon and central Pb+Pb collisions. The mean multiplicity of pions per wounded nucleon in \textit{central} $^7$Be+$^9$Be collisions is close to that in central Pb+Pb collisions up to 75$A$GeV/$c$. However, at the top SPS energy the result is close to the one for inelastic nucleon-nucleon interactions. The results are discussed in the context of predictions for the onset of deconfinement at the CERN SPS collision energies.

Published
2020
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21. Measurements of $\Xi^{-}$ and $\overline{\Xi}^{+}$ production in proton-proton interactions at $\sqrt{s_{NN}}$ = 17.3 GeV in the NA61/SHINE experiment

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wojcik, K., Wyszyński, O., Zimmerman, E. D., and Zwaska, R.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

The production of $\Xi(1321)^{-}$ and $\overline{\Xi}(1321)^{+}$ hyperons in inelastic p+p interactions is studied in a fixed target experiment at a beam momentum of 158 GeV/textit{c}. Double differential distributions in rapidity y and transverse momentum $p_{T}$ are obtained from a sample of 33M inelastic events. They allow to extrapolate the spectra to full phase space and to determine the mean multiplicity of both $\Xi^{-}$ and $\overline{\Xi}^{+}$. The rapidity and transverse momentum spectra are compared to transport model predictions. The $\Xi^{-}$ mean multiplicity in inelastic p+p interactions at 158~\GeVc is used to quantify the strangeness enhancement in A+A collisions at the same centre-of-mass energy per nucleon pair.

Published
2020

22. Two-particle correlations in azimuthal angle and pseudorapidity in central $^7$Be+$^9$Be collisions at the CERN Super Proton Synchrotron

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Uzhva, D., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wojcik, K., Wyszyński, O., Zimmerman, E. D., and Zwaska, R.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

A measurement of charged hadron pair correlations in two-dimensional $\Delta\eta\Delta\phi$ space is presented. The analysis is based on total 30 million central Be+Be collisions observed in the NA61/SHINE detector at the CERN SPS for incident beam momenta of 19$A$, 30$A$, 40$A$, 75$A$, and 150$A$ GeV/$c$. Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The $C(\Delta\eta,\Delta\phi)$ correlation functions were compared with results from a similar analysis on p+p interactions at similar beam momenta per nucleon. General trends of the back-to-back correlations are similar in central Be+Be collisions and p+p interactions, but are suppressed in magnitude due to the increased combinatorial background. Predictions from the EPOS and UrQMD models are compared to the measurements. Evolution of an enhancement around $(\Delta\eta,\Delta\phi) = (0,0)$ with incident energy is observed in central Be+Be collisions. It is not predicted by both models and almost non-existing in proton-proton collisions at the same momentum per nucleon., Comment: 28 pages, 17 figures, applied corrections after journal review

Published
2020
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23. $K^{*}(892)^0$ meson production in inelastic p+p interactions at 158 GeV/$c$ beam momentum measured by NA61/SHINE at the CERN SPS

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, E., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Łysakowski, B., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Manić, D., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Richter-Wąs, E., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wyszyński, O., Zimmerman, E. D., and Zwaska, R.

Subjects
Nuclear Experiment
Abstract

The measurement of $K^{*}(892)^0$ resonance production via its $K^{+}\pi^{-}$ decay mode in inelastic p+p collisions at beam momentum 158 GeV/$c$ ($\sqrt{s_{NN}}=17.3$ GeV) is presented. The data were recorded by the NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The \textit{template} method was used to extract the $K^{*}(892)^0$ signal and double differential transverse momentum and rapidity spectra were obtained. The full phase-space mean multiplicity of $K^{*}(892)^0$ mesons was found to be $(78.44 \pm 0.38 \mathrm{(stat)} \pm 6.0 \mathrm{(sys)) \cdot 10^{-3}}$. The NA61/SHINE results are compared with the EPOS1.99 and Hadron Resonance Gas models as well as with world data from p+p and nucleus-nucleus collisions., Comment: version published in Eur. Phys. J. C

Published
2020
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24. Search for an exotic S=-2, Q=-2 baryon resonance in proton-proton interactions at $\sqrt{s_{NN}}$ = 17.3 GeV

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wyszyński, O., Zimmerman, E. D., and Zwaska, R.

Subjects
High Energy Physics - Experiment
Abstract

Pentaquark states have been extensively investigated theoretically in the context of the constituent quark model. In this paper results of an experimental search for pentaquarks in the \Xim\pim, \Xim\pip, \Xip\pim and \Xip\pip invariant mass spectra in proton-proton interactions at $\sqrt{s}$=17.3~\GeV are presented. Previous possible evidence from the NA49 collaboration of the existence of a narrow \Xim\pim baryon resonance in p+p interactions is not confirmed with almost 10 times greater event statistics. The search was performed using the \NASixtyOne detector which reuses the main components of the NA49 apparatus. No signal was observed with either the selection cuts of NA49 or newly optimised cuts., Comment: The papaer quote 33 M events while in reality after describted event cuts number reduced to 26M

Published
2019
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25. Proton-proton interactions and onset of deconfinement

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wyszyński, O., Zimmerman, E. D., and Zwaska, R.

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

The NA61/SHINE experiment at the CERN SPS is performing a uniqe study of the phase diagram of strongly interacting matter by varying collision energy and nuclear mass number of colliding nuclei. In central Pb+Pb collisions the NA49 experiment found structures in the energy dependence of several observables in the CERN SPS energy range that had been predicted for the transition to a deconfined phase. New measurements of NA61/SHINE find intriguing similarities in p+p interactions for which no deconfinement transition is expected at SPS energies. Possible implications will be discussed.

Published
2019
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27. Measurements of hadron production in $\pi^{+}$ + C and $\pi^{+}$ + Be interactions at 60 GeV/$c$

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, E., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Łysakowski, B., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Mills, G. B., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Richter-Wąs, E., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Snoch, A., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wojtaszek-Szwarc, A., Wójcik, K., Wyszyński, O., Zambelli, L., Zimmerman, E. D., and Zwaska, R.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

Precise knowledge of hadron production rates in the generation of neutrino beams is necessary for accelerator-based neutrino experiments to achieve their physics goals. NA61/SHINE, a large-acceptance hadron spectrometer, has recorded hadron+nucleus interactions relevant to ongoing and future long-baseline neutrino experiments at Fermi National Accelerator Laboratory. This paper presents three analyses of interactions of 60 GeV/$c$ $\pi^+$ with thin, fixed carbon and beryllium targets. Integrated production and inelastic cross sections were measured for both of these reactions. In an analysis of strange, neutral hadron production, differential production multiplicities of $K^0_{S}$, $\Lambda$ and anti-$\Lambda$ were measured. Lastly, in an analysis of charged hadron production, differential production multiplicities of $\pi^+$, $\pi^-$, $K^+$, $K^-$ and protons were measured. These measurements will enable long-baseline neutrino experiments to better constrain predictions of their neutrino flux in order to achieve better precision on their neutrino cross section and oscillation measurements.

Published
2019
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28. Measurements of production and inelastic cross sections for $\mbox{p}+\mbox{C}$, $\mbox{p}+\mbox{Be}$, and $\mbox{p}+\mbox{Al}$ at 60 GeV/$c$ and $\mbox{p}+\mbox{C}$ and $\mbox{p}+\mbox{Be}$ at 120 GeV/$c$

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, E., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Łysakowski, B., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Mills, G. B., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Richter-Wąs, E., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Snoch, A., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wojtaszek-Szwarc, A., Wójcik, K., Wyszyński, O., Zambelli, L., Zimmerman, E. D., and Zwaska, R.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

This paper presents measurements of production cross sections and inelastic cross sections for the following reactions: 60 GeV/$c$ protons with C, Be, Al targets and 120 GeV/$c$ protons with C and Be targets. The analysis was performed using the NA61/SHINE spectrometer at the CERN SPS. First measurements were obtained using protons at 120 GeV/$c$, while the results for protons at 60 GeV/$c$ were compared with previously published measurements. These interaction cross section measurements are critical inputs for neutrino flux prediction in current and future accelerator-based long-baseline neutrino experiments.

Published
2019
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29. Measurement of $\phi$ meson production in p+p interactions at 40, 80 and 158 GeV/c with the NA61/SHINE spectrometer at the CERN SPS

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E. V., Antićić, T., Babkin, V., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Buryakov, M., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Csanad, M., Cybowska, J., Czopowicz, T., Damyanova, A., Davis, N., Deliyergiyev, M., Deveaux, M., Dmitriev, A., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, E., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Łysakowski, B., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Manić, D., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Pszczel, D., Puławski, S., Puzović, J., Ravonel, M., Renfordt, R., Richter-Wąs, E., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wojtaszek-Szwarc, A., Wyszyński, O., Zambelli, L., Zimmerman, E. D., and Zwaska, R.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

Results on $\phi$ meson production in inelastic p+p collisions at CERN SPS energies are presented. They are derived from data collected by the NA61/SHINE fixed target experiment, by means of invariant mass spectra fits in the $\phi \to K^+K^-$ decay channel. They include the first ever measured double differential spectra of $\phi$ mesons as a function of rapidity $y$ and transverse momentum $p_T$ for proton beam momenta of 80 GeV/c and 158 GeV/c, as well as single differential spectra of $y$ or $p_T$ for beam momentum of 40 GeV/c. The corresponding total $\phi$ yields per inelastic p+p event are obtained. These results are compared with existing data on $\phi$ meson production in p+p collisions. The comparison shows consistency but superior accuracy of the present measurements. The emission of $\phi$ mesons in p+p reactions is confronted with that occurring in Pb+Pb collisions, and the experimental results are compared with model predictions. It appears that none of the considered models can properly describe all the experimental observables.

Published
2019

47. Dedicated $\Delta$E-E detector system for searching long lived heaviest nuclei deposited in scintillators

Author

Zelga, K., Majka, Z., Płaneta, R., Sosin, Z., Wieloch, A., Adamczyk, M., Łojek, K., Barbui, M., Wuenschel, S., Hagel, K., Cao, X., Natowitz, J., Wada, R., Giuliani, G., Kim, E-J., Zheng, H., and Kowalski, S.

Subjects
Physics - Instrumentation and Detectors
Abstract

We present a dedicated experimental setup which is currently used to search for long lived super heavy elements (SHE) implanted in catcher scintillators which were irradiated by reaction products of $^{197}$Au (7.5 A.MeV) projectile and $^{232}$Th target collisions during our experiment performed at Cyclotrone Institute, Texas A$\&$M University in 2015. The built-in novel measuring apparatus consists of $\Delta$E-E detector pairs which are able to register $\alpha$ or spontaneous fission (SF) decays of heavy reaction products deposited in the scintillators. Their unique feature is that the examined scintillators are at the same time $\Delta$E part of each of $\Delta$E-E detector while E part is a silicon detector. Our apparatus is dedicated to search for SHEs which have a lifetime of a year till tens of years. Results of commissioning tests of our setup are presented., Comment: 6 pages, 3 figures, presented at Zakopane Conference on Nulear Physics 2018, submitted to Acta Physica Polonica B

Published
2018
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48. Multi-Wire 3D Gas Tracker for Searching New Physics in Nuclear Beta Decay

Author

Rozpedzik, D., Bodek, K., Lojek, K., Perkowski, M., De Keukeleere, L., Hayen, L., Severijns, N., and Kozela, A.

Subjects
Physics - Instrumentation and Detectors
Abstract

Searches of new physics beyond the Standard Model (SM) performed at low energy frontiers are complementary to experiments carried out at high energy colliders. Among the methods for testing the SM and beyond at low energies are the precision spectrum shape and correlation coefficient measurements in nuclear and neutron beta decay. In order to study tiny effects in beta spectrum shape, a special spectrometer was built. It consists of a 3D low pressure gas tracker (drift chamber with hexagonal cells, signal readout at both wire ends) and plastic scintillators for triggering data acquisition and registration of the beta particle energy. The results of the characterization process indicate the possibility of using such a gas tracker in a range of experiments with low energy electrons where beta particle tracking with minimal kinematics deterioration is beneficial. Application of this technique is also planned for neutron decay correlation experiments. In the paper, the first application of this tracker in a high-precision beta spectrum shape study is discussed. The measurement technique, commissioning results, and the future outlook are presented., Comment: Talk presented at CIPANP2018. 10 pages, 6 figures

Published
2018

49. Measurements of $\pi^{\pm}$, $K^{\pm}$ and proton yields from the surface of the T2K replica target for incoming 31 GeV/c protons with the NA61/SHINE spectrometer at the CERN SPS

Author

Collaboration, The NA61/SHINE, Abgrall, N., Aduszkiewicz, A., Andronov, E. V., Antićić, T., Baatar, B., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Czopowicz, T., Damyanova, A., Davis, N., Deveaux, M., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Ereditato, A., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Hasegawa, T., Hervé, A. E., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, E., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Łysakowski, B., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Manić, D., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, Ł., Mills, G. B., Morozov, S., Mrówczyński, S., Nagai, Y., Nakadaira, T., Naskręt, M., Nishikawa, K., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Pistillo, C., Płaneta, R., Podlaski, P., Popov, B. A., Posiadała-Zezula, M., Prokhorova, D. S., Puławski, S., Puzović, J., Rauch, W., Ravonel, M., Renfordt, R., Richter-Wąs, E., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Sakashita, K., Schmidt, K., Sekiguchi, T., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Shibata, M., Słodkowski, M., Snoch, A., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Tada, M., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Walewski, M., Wickremasinghe, A., Włodarczyk, Z., Wojtaszek-Szwarc, A., Wyszyński, O., Zambelli, L., Zimmerman, E. D., Zwaska, R., Group, The T2K Beam, Berns, L., Fiorentini, G. A., Friend, M., Hartz, M., Vladisavljevic, T., and Yu, M.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

Measurements of the $\pi^{\pm}$, $K^{\pm}$, and proton double differential yields emitted from the surface of the 90-cm-long carbon target (T2K replica) were performed for the incoming 31 GeV/c protons with the NA61/SHINE spectrometer at the CERN SPS using data collected during 2010 run. The double differential $\pi^{\pm}$ yields were measured with increased precision compared to the previously published NA61/SHINE results, while the $K^{\pm}$ and proton yields were obtained for the first time. A strategy for dealing with the dependence of the results on the incoming proton beam profile is proposed. The purpose of these measurements is to reduce significantly the (anti)neutrino flux uncertainty in the T2K long-baseline neutrino experiment by constraining the production of (anti)neutrino ancestors coming from the T2K target., Comment: 43 pages, 55 figures

Published
2018
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50. Measurements of total production cross sections for $\pi^{+}$+C, $\pi^{+}$+Al, $K^{+}$+C, and $K^{+}$+Al at 60 GeV/c and $\pi^{+}$+C and $\pi^{+}$+Al at 31 GeV/c

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Andronov, E., Antićić, T., Baatar, B., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Bzdak, A., Cherif, H., Ćirković, M., Czopowicz, T., Damyanova, A., Davis, N., Deveaux, M., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gaździcki, M., Golosov, O., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Hervé, A. E., Igolkin, S., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, E., Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., László, A., Lazareva, T. V., Lewicki, M., Łojek, K., Łysakowski, B., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Manić, D., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A., Messerly, B., Mik, Ł., Mills, G. B., Morozov, S., Mrówczyński, S., Nagai, Y., Naskręt, M., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Płaneta, R., Podlaski, P., Popov, B. A., Posiadała, M., Puławski, S., Puzović, J., Rauch, W., Ravonel, M., Renfordt, R., Richter-Wąs, E., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, K., Selyuzhenkov, I., Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Snoch, A., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Ströbele, H., Šuša, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberič, D., Vechernin, V. V., Walewski, M., Wickremasinghe, A., Włodarczyk, Z., Wojtaszek-Szwarc, A., Wyszyński, O., Yarritu, K., Zambelli, L., Zimmerman, E. D., and Zwaska, R.

Subjects
High Energy Physics - Experiment
Abstract

This paper presents several measurements of total production cross sections and total inelastic cross sections for the following reactions: $\pi^{+}$+C, $\pi^{+}$+Al, $K^{+}$+C, $K^{+}$+Al at 60 GeV/c, $\pi^{+}$+C and $\pi^{+}$+Al at 31 GeV/c . The measurements were made using the NA61/SHINE spectrometer at the CERN SPS. Comparisons with previous measurements are given and good agreement is seen. These interaction cross sections measurements are a key ingredient for neutrino flux prediction from the reinteractions of secondary hadrons in current and future accelerator-based long-baseline neutrino experiments., Comment: Updated to accepted text

Published
2018
Full Text
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