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201. Overview of the electromagnetic production of strange mesons at MAMI

Author

Achenbach, P., Gómez Rodríguez, M., Tsukada, K., Ayerbe Gayoso, C., Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Bydžovský, P., Debenjak, L., Distler, M.O., Esser, A., Friščić, I., Fujii, Y., Gogami, T., Hashimoto, O., Hirose, S., Kanda, H., Kaneta, M., Kim, E., Margaryan, A., Merkel, H., Müller, U., Nagao, S., Nakamura, S.N., Pochodzalla, J., Rappold, C., Reinhold, J., Saito, T.R., Sanchez Lorente, A., Sánchez Majos, S., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Tang, L., and Thiel, M.

Published
2013
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202. Spatio-temporal prediction model of out-of-hospital cardiac arrest: Designation of medical priorities and estimation of human resources requirement

Author

Auricchio, A, Peluso, S, Caputo, M, Reinhold, J, Benvenuti, C, Burkart, R, Cianella, R, Klersy, C, Baldi, E, Mira, A, Auricchio Angelo, Peluso S., Caputo M. L., Reinhold J., Benvenuti Claudio, Burkart R., Cianella R., Klersy C., Baldi E., Mira A., Auricchio, A, Peluso, S, Caputo, M, Reinhold, J, Benvenuti, C, Burkart, R, Cianella, R, Klersy, C, Baldi, E, Mira, A, Auricchio Angelo, Peluso S., Caputo M. L., Reinhold J., Benvenuti Claudio, Burkart R., Cianella R., Klersy C., Baldi E., and Mira A.

Abstract

Aims To determine the out-of-hospital cardiac arrest (OHCA) rates and occurrences at municipality level through a novel statistical model accounting for temporal and spatial heterogeneity, space-time interactions and demographic features. We also aimed to predict OHCAs rates and number at municipality level for the upcoming years estimating the related resources requirement. Methods All the consecutive OHCAs of presumed cardiac origin occurred from 2005 until 2018 in Canton Ticino region were included. We implemented an Integrated Nested Laplace Approximation statistical method for estimation and prediction of municipality OHCA rates, number of events and related uncertainties, using age and sex municipality compositions. Comparisons between predicted and real OHCA maps validated our model, whilst comparisons between estimated OHCA rates in different yeas and municipalities identified significantly different OHCA rates over space and time. Longer-time predicted OHCA maps provided Bayesian predictions of OHCA coverages in varying stressful conditions. Results 2344 OHCAs were analyzed. OHCA incidence either progressively reduced or continuously increased over time in 6.8% of municipalities despite an overall stable spatio-temporal distribution of OHCAs. The predicted number of OHCAs accounts for 89% (2017) and 90% (2018) of the yearly variability of observed OHCAs with prediction error ≤1OHCA for each year in most municipalities. An increase in OHCAs number with a decline in the Automatic External Defibrillator availability per OHCA at region was estimated. Conclusions Our method enables prediction of OHCA risk at municipality level with high accuracy, providing a novel approach to estimate resource allocation and anticipate gaps in demand in upcoming years.

Published
2020

203. Measurement of Spin Density Matrix Elements in Λ(1520)\ud Photoproduction at 8.2 GeV to 8.8 GeV

Author

Adhikari, S., Akondi, C.S., Albrecht, M., Ali, A., Amaryan, M., Asaturyan, A., Austregesilo, A., Baldwin, Z., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Beattie, T.D., Berdnikov, V.V., Black, T., Boeglin, W., Briscoe, W.J., Britton, T., Brooks, W.K., Chudakov, E., Cole, S., Cole, P.L., Cortes, O., Crede, V., Dalton, M.M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Egiyan, H., Erbora, T., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Fitches, Jamie, Foda, A.M., Furletov, S., Gan, L., Gao, H., Gasparian, A., Gleason, C., Goetzen, K., Goryachev, V.S., Guo, L., Hagen, M., Hakobyan, H., Hamdi, A., Hernandez, J., Hoffman, N.D., Hou, G., Huber, G.M., Hurley, A., Ireland, David G., Ito, M.M., Jaegle, I., Jarvis, N.S., Jones, R.T., Kakoyan, V., Kalicy, G., Kamel, M., Khachatryan, V., Khatchatryan, M., Kourkoumelis, C., Kuleshov, S., LaDuke, A., Larin, I., Lawrence, D., Lersch, D.I., Li, H., Li, W.B., Liu, B., Livingston, Kenneth, Lolos, G.J., Luckas, K., Lyubovitskij, V., Mack, D., Mahmood, A., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., Meyer, C.A., Miskimen, R., Mitchell, R.E., Mizutani, K., Neelamana, V., Nerling, F., Ng, L., Ostrovidov, A.I., Papandreou, Z., Paudel, C., Pauli, Peter, Pedroni, R., Pentchev, L., Peters, K.J., Reinhold, J., Ritchie, B.G., Ritman, J., Rodriguez, G., Romanov, D., Romero, C., Saldana, K., Salgado, C., Schadmand, S., Schertz, A.M., Schick, A., Schmidt, A., Schumacher, R.A., Schwiening, J., Sharp, P., Shen, X., Shepherd, M.R., Smith, A., Smith, E.S., Sober, D.I., Somov, A., Somov, S., Soto, O., Stevens, J.R., Strakovsky, I.I., Sumner, B., Suresh, K., Tarasov, V.V., Taylor, S., Teymurazyan, A., Thiel, Annika, Vasileiadis, G., Viducic, T., Whitlatch, T., Wickramaarachchi, N., Williams, M., Yang, Y., Zarling, J., Zhang, Z., Zhao, Z., Zhou, J., Zhou, X., Zhou, Q., Zihlmann, B., Glazier, Derek I., and Mathieu, V.

Abstract

We report on the measurement of spin density matrix elements of the Λ(1520) in the photoproduction reaction γp → Λ(1520)K+, via its subsequent decay to K−p. The measurement was performed\ud as part of the GlueX experimental program in Hall D at Jefferson Lab using a linearly polarized\ud photon beam with Eγ = 8.2 GeV–8.8 GeV. These are the first such measurements in this photon\ud energy range. Results are presented in bins of momentum transfer squared, −(t − t0). We compare\ud the results with a Reggeon exchange model and determine that natural exchange amplitudes are\ud dominant in Λ(1520) photoproduction.

Published
2022

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Author

20750368, Suzuki, K N, Gogami, T, Pandey, B, Itabashi, K, Nagao, S, Okuyama, K, Nakamura, S N, Tang, L, Abrams, D, Akiyama, T, Androic, D, Aniol, K, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Chen, J, Covrig, S, Chrisman, D, Cruz-Torres, R, Das, R, Fuchey, E, Gnanvo, K, Garibaldi, F, Gautam, T, Gomez, J, Gueye, P, Hague, T J, Hansen, O, Henry, W, Hauenstein, F, Higinbotham, D W, Hyde, C E, Kaneta, M, Keppel, C, Kutz, T, Lashley-Colthirst, N, Li, S, Liu, H, Mammei, J, Markowitz, P, McClellan, R E, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nguyen, D, Nycz, M, Owen, V, Palatchi, C, Park, S, Petkovic, T, Premathilake, S, Reimer, P E, Reinhold, J, Riordan, S, Rodriguez, V, Samanta, C, Santiesteban, S N, Sawatzky, B, Širca, S, Slifer, K, Su, T, Tian, Y, Toyama, Y, Uehara, K, Urciuoli, G M, Votaw, D, Williamson, J, Wojtsekhowski, B, Wood, S A, Yale, B, Ye, Z, Zhang, J, Zheng, X, 20750368, Suzuki, K N, Gogami, T, Pandey, B, Itabashi, K, Nagao, S, Okuyama, K, Nakamura, S N, Tang, L, Abrams, D, Akiyama, T, Androic, D, Aniol, K, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Chen, J, Covrig, S, Chrisman, D, Cruz-Torres, R, Das, R, Fuchey, E, Gnanvo, K, Garibaldi, F, Gautam, T, Gomez, J, Gueye, P, Hague, T J, Hansen, O, Henry, W, Hauenstein, F, Higinbotham, D W, Hyde, C E, Kaneta, M, Keppel, C, Kutz, T, Lashley-Colthirst, N, Li, S, Liu, H, Mammei, J, Markowitz, P, McClellan, R E, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nguyen, D, Nycz, M, Owen, V, Palatchi, C, Park, S, Petkovic, T, Premathilake, S, Reimer, P E, Reinhold, J, Riordan, S, Rodriguez, V, Samanta, C, Santiesteban, S N, Sawatzky, B, Širca, S, Slifer, K, Su, T, Tian, Y, Toyama, Y, Uehara, K, Urciuoli, G M, Votaw, D, Williamson, J, Wojtsekhowski, B, Wood, S A, Yale, B, Ye, Z, Zhang, J, and Zheng, X

Published
2022

205. CRIRES+ on sky : High spectral resolution at infrared wavelength enabling better science at the ESO VLT

Author

Dorn, Reinhold J., Bristow, Paul, Smoker, Jonathan, Rodler, Florian, Accardo, Matteo, Van den Ancker, Mario, Baruffolo, Andrea, Courtney-Barrer, Benjamin, Blanco, Leonardo, Brucalassi, Anna, Cumani, Claudio, Haimerl, Andreas, Hatzes, Artie, Haug, Marcus, Heiter, Ulrike, Hinterschuster, Renate, Hubin, Norbert, Ives, Derek J., Jung, Yves, Jones, Matias, Kirchbauer, Jean Paul, Klein, Barbara, Korhonen, Heidi Helena, Koehler, Jana, Lavail, Alexis, Lizon, Jean Louis, Moins, Christophe, Molina-Conde, Ignacio, Marquart, Thomas, Oliva, Ernesto, Pallanca, Laurent, Pasquini, Luca, Paufique, Jerome, Piskunov, Nikolai, Reiners, Ansgar, Schneller, Dominik, Schmutzer, Ricardo, Seemann, Ulf, Slumstrup, Ditte, Smette, Alain, Stegmeier, Joerg, Stempels, Eric, Tordo, Sebastien, Valenti, Elena, Valenzuela, Jose Javier, Vernet, Joel, Dorn, Reinhold J., Bristow, Paul, Smoker, Jonathan, Rodler, Florian, Accardo, Matteo, Van den Ancker, Mario, Baruffolo, Andrea, Courtney-Barrer, Benjamin, Blanco, Leonardo, Brucalassi, Anna, Cumani, Claudio, Haimerl, Andreas, Hatzes, Artie, Haug, Marcus, Heiter, Ulrike, Hinterschuster, Renate, Hubin, Norbert, Ives, Derek J., Jung, Yves, Jones, Matias, Kirchbauer, Jean Paul, Klein, Barbara, Korhonen, Heidi Helena, Koehler, Jana, Lavail, Alexis, Lizon, Jean Louis, Moins, Christophe, Molina-Conde, Ignacio, Marquart, Thomas, Oliva, Ernesto, Pallanca, Laurent, Pasquini, Luca, Paufique, Jerome, Piskunov, Nikolai, Reiners, Ansgar, Schneller, Dominik, Schmutzer, Ricardo, Seemann, Ulf, Slumstrup, Ditte, Smette, Alain, Stegmeier, Joerg, Stempels, Eric, Tordo, Sebastien, Valenti, Elena, Valenzuela, Jose Javier, and Vernet, Joel

Abstract

CRIRES+ extended the capabilities of CRIRES, the CRyogenic InfraRed Echelle Spectrograph. It transformed this VLT instrument into a cross-dispersed spectrograph to increase the wavelength range that is covered simultaneously by a factor of ten. In addition, a new detector focal plane array of three Hawaii 2RG detectors with a 5.3 mu m cut-off wavelength replaced the existing detectors. Amongst many other improvements a new spectropolarimetric unit was added and the calibration system has been enhanced. The instrument was installed at the VLT on Unit Telescope 3 beginning of 2020 and successfully commissioned and verified for science operations during 2021, partly remote from Europe due to the pandemic. The instrument was subsequently offered to the community from October 2021 onwards. This article describes the performance and capabilities of this development and presents on sky results.

Published
2022
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206. CRIRES+ : Characterisation and preparation during the pandemic

Author

Bristow, Paul, Baruffolo, Andrea, Smoker, Jonathan, Rodler, Florian, Dorn, Reinhold J., Cumani, Claudio, Ives, Derek J., Jung, Yves, Marquart, Thomas, Moins, Christophe, Neeser, Mark J., Oliva, Ernesto, Paufique, Jerome, Piskunov, Nikolai, Schmutzer, Ricardo, Seemann, Ulf, Slumstrup, Ditte, Valenzuela, Jose Javier, Bristow, Paul, Baruffolo, Andrea, Smoker, Jonathan, Rodler, Florian, Dorn, Reinhold J., Cumani, Claudio, Ives, Derek J., Jung, Yves, Marquart, Thomas, Moins, Christophe, Neeser, Mark J., Oliva, Ernesto, Paufique, Jerome, Piskunov, Nikolai, Schmutzer, Ricardo, Seemann, Ulf, Slumstrup, Ditte, and Valenzuela, Jose Javier

Abstract

In early 2020 the upgraded(1) CRIRES2 instrument, was installed at the VLT, however the onset of the global pandemic prevented the completion of some aspects of the installation while characterisation and commissioning had to be conducted with a remote connection from Europe. This resulted in a somewhat experimental, ad-hoc, approach to characterisation that required tight co-ordination between Paranal scientists and the instrument team in Europe. Moreover, with the observatory operating at minimal staffing, we had to find workarounds for some unfinished parts of the installation and adapt our characterisation, calibration and operations strategies accordingly. In particular, we discuss the adaptation made to the metrology strategy that illustrates well the pragmatic and ultimately successful approach adopted for getting CRIRES+ ready for operations.

Published
2022
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209. Strange hadronic physics in electroproduction experiments at the Mainz Microtron

Author

Achenbach, P., Esser, A., Ayerbe Gayoso, C., Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Bydžovský, P., Debenjak, L., Distler, M.O., Friščić, I., Fujii, Y., Gogami, T., Gómez Rodríguez, M., Hashimoto, O., Hirose, S., Kim, E., Margaryan, A., Merkel, H., Müller, U., Nagao, S., Nakamura, S.N., Pochodzalla, J., Rappold, C., Reinhold, J., Saito, T.R., Sanchez Lorente, A., Sánchez Majos, S., Schlimme, B.S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., Tang, L., Thiel, M., and Tsukada, K.

Published
2012
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210. Aligning strategic position, behavior, and structure for smart service businesses in manufacturing

Author

Koldewey, C., Hemminger, A., Reinhold, J., Gausemeier, J., Dumitrescu, R., Chohan, N., Frank, M., and Publica

Abstract

The manufacturing industry is currently experiencing profound changes driven by digitalization and servitization. Consequently, so-called smart services, which are digital services that generate value from product data, are gaining considerable attention. However, many companies are struggling with their strategic management, particularly in terms of strategic position, behavior, and structure. In the literature, a discussion on such an integrative view is missing. In this paper, we introduce a process model that allows choosing adequate strategic competences and a suitable structure for a smart service business. Accordingly, this model enables manufacturing companies to align their strategic position (i.e., products and markets), competences, and structure. We put forward the case for an integrative view on strategy for smart services in theory and deliver an approach for managers in their day-to-day businesses.

Published
2022

211. The cross-section measurement for the ³H(e, e′K⁺)nnΛ reaction

Author

Suzuki, K N, Gogami, T, Pandey, B, Itabashi, K, Nagao, S, Okuyama, K, Nakamura, S N, Tang, L, Abrams, D, Akiyama, T, Androic, D, Aniol, K, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Chen, J, Covrig, S, Chrisman, D, Cruz-Torres, R, Das, R, Fuchey, E, Gnanvo, K, Garibaldi, F, Gautam, T, Gomez, J, Gueye, P, Hague, T J, Hansen, O, Henry, W, Hauenstein, F, Higinbotham, D W, Hyde, C E, Kaneta, M, Keppel, C, Kutz, T, Lashley-Colthirst, N, Li, S, Liu, H, Mammei, J, Markowitz, P, McClellan, R E, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nguyen, D, Nycz, M, Owen, V, Palatchi, C, Park, S, Petkovic, T, Premathilake, S, Reimer, P E, Reinhold, J, Riordan, S, Rodriguez, V, Samanta, C, Santiesteban, S N, Sawatzky, B, Širca, S, Slifer, K, Su, T, Tian, Y, Toyama, Y, Uehara, K, Urciuoli, G M, Votaw, D, Williamson, J, Wojtsekhowski, B, Wood, S A, Yale, B, Ye, Z, Zhang, J, and Zheng, X

Subjects
D14 Hypernuclei
Abstract

The small binding energy of the hypertriton leads to predictions of the non-existence of bound hypernuclei for isotriplet three-body systems such as nnΛ. However, invariant mass spectroscopy at GSI has reported events that may be interpreted as the bound nnΛ state. The nnΛ state was sought by missing-mass spectroscopy via the (e, e′K⁺) reaction at Jefferson Lab’s experimental HallA. The present experiment has higher sensitivity to the nnΛ-state investigation in terms of better precision by a factor of about three. The analysis shown in this article focuses on the derivation of the reaction cross-section for the ³H(γ*, K⁺)X reaction. Events that were detected in an acceptance, where a Monte Carlo simulation could reproduce the data well ($|delta p/p| lt 4%$), were analyzed to minimize the systematic uncertainty. No significant structures were observed with the acceptance cuts, and the upper limits of the production cross-section of the nnΛ state were obtained to be 21 and $31 , rm {nb} , rm {sr}^{-1}$ at the $90%$ confidence level when theoretical predictions of (−BΛ, Γ) = (0.25, 0.8) MeV and (0.55, 4.7) MeV, respectively, were assumed. The cross-section result provides valuable information for examining the existence of nnΛ., 電荷をもたない奇妙な原子核の高精度探索 --ラムダ-中性子-中性子の三体系--. 京都大学プレスリリース. 2022-03-08.

Published
2022

212. Search for photoproduction of axionlike particles at GlueX

Author

GlueX Collaboration, Adhikari, S., Akondi, C. S., Albrecht, M., Ali, A., Amaryan, M., Asaturyan, A., Austregesilo, A., Baldwin, Z., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Beattie, T. D., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Britton, T., Brooks, W. K., Chudakov, E., Cole, S., Cole, P. L., Cortes, O., Crede, V., Dalton, M. M., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Ebersole, D., Egiyan, H., Erbora, T., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Fitches, J., Foda, A. M., Furletov, S., Gan, L., Gao, H., Gasparian, A., Gleason, C., Goetzen, K., Goryachev, V. S., Guo, L., Hagen, M., Hakobyan, H., Hamdi, A., Hernandez, J., Hoffman, N. D., Hou, G., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jaegle, I., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Khachatryan, V., Khatchatryan, M., Kourkoumelis, C., Kuleshov, S., LaDuke, A., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W. B., Liu, B., Livingston, K., Lolos, G. J., Lorenti, L., Luckas, K., Lyubovitskij, V., Mack, D., Mahmood, A., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mizutani, K., Neelamana, V., Nerling, F., Ng, L., Ostrovidov, A. I., Papandreou, Z., Paudel, C., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Reinhold, J., Ritchie, B. G., Ritman, J., Rodriguez, G., Romanov, D., Romero, C., Saldana, K., Salgado, C., Schadmand, S., Schertz, A. M., Schick, A., Schmidt, A., Schumacher, R. A., Schwiening, J., Sharp, P., Shen, X., Shepherd, M. R., Smith, A., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Sumner, B., Suresh, K., Tarasov, V. V., Taylor, S., Teymurazyan, A., Thiel, A., Vasileiadis, G., Viducic, T., Whitlatch, T., Wickramaarachchi, N., Williams, M., Yang, Y., Yoon, S., Zarling, J., Zhang, Z., Zhao, Z., Zhou, J., Zhou, X., and Zihlmann, B.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, фотоны, FOS: Physical sciences, глюоны, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), ddc:530, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, протон-протонные столкновения, аксионоподобные частицы
Abstract

We present a search for axion-like particles, $a$, produced in photon-proton collisions at a center-of-mass energy of approximately 4 GeV, focusing on the scenario where the $a$-gluon coupling is dominant. The search uses $a\to\gamma\gamma$ and $a\to\pi^+\pi^-\pi^0$ decays, and a data sample corresponding to an integrated luminosity of 168 pb$^{-1}$ collected with the GlueX detector. The search for $a\to\gamma\gamma$ decays is performed in the mass range of $180 < m_a < 480$ MeV, while the search for $a\to\pi^+\pi^-\pi^0$ decays explores the $600 < m_a < 720$ MeV region. No evidence for a signal is found, and 90% confidence-level exclusion limits are placed on the $a$-gluon coupling strength. These constraints are the most stringent to date over much of the mass ranges considered., Comment: 8 pages, 4 figures, 2 tables; updated to published version

Published
2022
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213. Measurement of spin density matrix elements in Λ ( 1520 ) photoproduction at 8.2–8.8 GeV

Author

Adhikari, S., Akondi, C. S., Barriga, E., Ritchie, B. G., Ritman, J., Rodriguez, G., Romanov, D., Romero, C., Saldana, K., Salgado, C., Schadmand, Susan, Schertz, A. M., Schick, A., Barsotti, R., Schmidt, A., Schumacher, R. A., Schwiening, J., Sharp, P., Shen, X., Shepherd, M. R., Smith, A., Smith, E. S., Sober, D. I., Somov, A., Beattie, T. D., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Sumner, B., Suresh, K., Tarasov, V. V., Taylor, S., Teymurazyan, A., Thiel, A., Berdnikov, V. V., Vasileiadis, G., Viducic, T., Whitlatch, T., Wickramaarachchi, N., Williams, M., Yang, Y., Zarling, J., Zhang, Z., Zhao, Z., Zhou, J., Black, T., Zhou, X., Zhou, Q., Zihlmann, B., Glazier, D. I., Mathieu, V., Boeglin, W., Briscoe, W. J., Britton, T., Brooks, W. K., Chudakov, E., Albrecht, M., Cole, S., Cole, P. L., Cortes, O., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Ali, A., Dugger, M., Dzhygadlo, R., Egiyan, H., Erbora, T., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Fitches, J., Foda, A. M., Amaryan, M., Furletov, S., Gan, L., Gao, H., Gasparian, A., Gleason, C., Goetzen, K., Goryachev, V. S., Guo, L., Hagen, M., Hakobyan, H., Asaturyan, A., Hamdi, A., Hernandez, J., Hoffman, N. D., Hou, G., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jaegle, I., Jarvis, N. S., Austregesilo, A., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Khachatryan, V., Khatchatryan, M., Kourkoumelis, C., Kuleshov, S., LaDuke, A., Larin, I., Baldwin, Z., Lawrence, D., Lersch, D. I., Li, H., Li, W. B., Liu, B., Livingston, K., Lolos, G. J., Luckas, K., Lyubovitskij, V., Mack, D., Barbosa, F., Mahmood, A., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mizutani, K., Neelamana, V., Barlow, J., Nerling, F., Ng, L., Ostrovidov, A. I., Papandreou, Z., Paudel, C., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., and Reinhold, J.

Subjects
ddc:530
Abstract

We report on the measurement of spin density matrix elements of the Λ(1520) in the photoproduction reaction γp→Λ(1520)K+, via its subsequent decay to K−p. The measurement was performed as part of the GlueX experimental program in Hall D at Jefferson Laboratory using a linearly polarized photon beam with Eγ=8.2GeV–8.8GeV. These are the first such measurements in this photon energy range. Results are presented in bins of momentum transfer squared, −(t−t0). We compare the results with a Reggeon exchange model and determine that natural exchange amplitudes are dominant in Λ(1520) photoproduction.

Published
2022

214. Probing Cold Dense Nuclear Matter

Author

Subedi, R., Shneor, R., Monaghan, P., Anderson, B. D., Aniol, K., Annand, J., Arrington, J., Benaoum, H., Benmokhtar, F., Boeglin, W., Chen, J.-P., Choi, Seonho, Cisbani, E., Craver, B., Frullani, S., Garibaldi, F., Gilad, S., Gilman, R., Glamazdin, O., Hansen, J.-O., Higinbotham, D. W., Holmstrom, T., Ibrahim, H., Igarashi, R., de Jager, C. W., Jans, E., Jiang, X., Kaufman, L. J., Kelleher, A., Kolarkar, A., Kumbartzki, G., LeRose, J. J., Lindgren, R., Liyanage, N., Margaziotis, D. J., Markowitz, P., Marrone, S., Mazouz, M., Meekins, D., Michaels, R., Moffit, B., Perdrisat, C. F., Piasetzky, E., Potokar, M., Punjabi, V., Qiang, Y., Reinhold, J., Ron, G., Rosner, G., Saha, A., Sawatzky, B., Shahinyan, A., Sirca, S., Slifer, K., Solvignon, P., Sulkosky, V., Urciuoli, G. M., Voutier, E., Watson, J. W., Weinstein, L. B., Wojtsekhowski, B., Wood, S., Zheng, X.-C., and Zhu, L.

Published
2008
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217. The cross-section measurement for the 3H(e, e′K+)nnΛ reaction

Author

Suzuki, K N, primary, Gogami, T, additional, Pandey, B, additional, Itabashi, K, additional, Nagao, S, additional, Okuyama, K, additional, Nakamura, S N, additional, Tang, L, additional, Abrams, D, additional, Akiyama, T, additional, Androic, D, additional, Aniol, K, additional, Gayoso, C Ayerbe, additional, Bane, J, additional, Barcus, S, additional, Barrow, J, additional, Bellini, V, additional, Bhatt, H, additional, Bhetuwal, D, additional, Biswas, D, additional, Camsonne, A, additional, Castellanos, J, additional, Chen, J-P, additional, Chen, J, additional, Covrig, S, additional, Chrisman, D, additional, Cruz-Torres, R, additional, Das, R, additional, Fuchey, E, additional, Gnanvo, K, additional, Garibaldi, F, additional, Gautam, T, additional, Gomez, J, additional, Gueye, P, additional, Hague, T J, additional, Hansen, O, additional, Henry, W, additional, Hauenstein, F, additional, Higinbotham, D W, additional, Hyde, C E, additional, Kaneta, M, additional, Keppel, C, additional, Kutz, T, additional, Lashley-Colthirst, N, additional, Li, S, additional, Liu, H, additional, Mammei, J, additional, Markowitz, P, additional, McClellan, R E, additional, Meddi, F, additional, Meekins, D, additional, Michaels, R, additional, Mihovilovič, M, additional, Moyer, A, additional, Nguyen, D, additional, Nycz, M, additional, Owen, V, additional, Palatchi, C, additional, Park, S, additional, Petkovic, T, additional, Premathilake, S, additional, Reimer, P E, additional, Reinhold, J, additional, Riordan, S, additional, Rodriguez, V, additional, Samanta, C, additional, Santiesteban, S N, additional, Sawatzky, B, additional, Širca, S, additional, Slifer, K, additional, Su, T, additional, Tian, Y, additional, Toyama, Y, additional, Uehara, K, additional, Urciuoli, G M, additional, Votaw, D, additional, Williamson, J, additional, Wojtsekhowski, B, additional, Wood, S A, additional, Yale, B, additional, Ye, Z, additional, Zhang, J, additional, and Zheng, X, additional

Published
2021
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218. Current concepts on endothelial stem cells definition, location, and markers

Author

David M. Smadja, Varun Pathak, Edoardo Pedrini, Coralie L. Guerin, Alan W. Stitt, Nicolas Gendron, Lou Soret, Reinhold J. Medina, and Sarah Chambers

Subjects
Medicine (General), Angiogenesis, Cell, Neovascularization, Physiologic, Bioinformatics, Concise Reviews, blood vessels, angiogenesis, R5-920, circulating endothelial progenitor cells, Fibrosis, Ischemia, vascular repair, medicine, Humans, endothelial colony‐forming cells, Progenitor cell, Endothelial Progenitor Cells, QH573-671, business.industry, Vascular disease, Concise Review, Regeneration (biology), Stem Cells, Perivascular Stem/Progenitor Cells, Cell Biology, General Medicine, medicine.disease, Tissue Specific Stem Cells, Endothelial stem cell, Adult Stem Cells, medicine.anatomical_structure, Bone marrow, endothelial stem cells, neovascularization, business, Cytology, Biomarkers, Developmental Biology
Abstract

Ischemic vascular disease is a major cause of mortality and morbidity worldwide, and regeneration of blood vessels in perfusion‐deficient tissues is a worthwhile therapeutic goal. The idea of delivering endothelial stem/progenitor cells to repair damaged vasculature, reperfuse hypoxic tissue, prevent cell death, and consequently diminish tissue inflammation and fibrosis has a strong scientific basis and clinical value. Various labs have proposed endothelial stem/progenitor cell candidates. This has created confusion, as there are profound differences between these cell definitions based on isolation methodology, characterization, and reparative biology. Here, a stricter definition based on stem cell biology principles is proposed. Although preclinical studies have often been promising, results from clinical trials have been highly contradictory and served to highlight multiple challenges associated with disappointing therapeutic benefit. This article reviews recent accomplishments in the field and discusses current difficulties when developing endothelial stem cell therapies. Emerging evidence that disputes the classic view of the bone marrow as the source for these cells and supports the vascular wall as the niche for these tissue‐resident endothelial stem cells is considered. In addition, novel markers to identify endothelial stem cells, including CD157, EPCR, and CD31low VEGFR2low IL33+ Sox9+, are described., Understanding endothelial stem/progenitor cells.

Published
2021

219. Intravitreal AAV2.COMP-Ang1 Prevents Neurovascular Degeneration in a Murine Model of Diabetic Retinopathy

Author

Cahoon, Judd M., Rai, Ruju R., Carroll, Lara S., Uehara, Hironori, Zhang, Xiaohui, O’Neil, Christina L., Medina, Reinhold J., Das, Subtrata K., Muddana, Santosh K., Olson, Paul R., Nielson, Spencer, Walker, Kortnie, Flood, Maggie M., Messenger, Wyatt B., Archer, Bonnie J., Barabas, Peter, Krizaj, David, Gibson, Christopher C., Li, Dean Y., Koh, Gou Y., Gao, Guangping, Stitt, Alan W., and Ambati, Balamurali K.

Published
2015
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220. Hypernuclear Spectroscopy at JLab Hall C

Author

Hashimoto, O., Chiba, A., Doi, D., Fujii, Y., Gogami, T., Kanda, H., Kaneta, M., Kawama, D., Maeda, K., Maruta, T., Matsumura, A., Nagao, S., Nakamura, S.N., Shichijo, A., Tamura, H., Taniya, N., Yamamoto, T., Yokota, K., Kato, S., Sato, Y., Takahashi, T., Noumi, H., Motoba, T., Hiyama, E., Albayrak, I., Ates, O., Chen, C., Christy, M., Keppel, C., Kohl, M., Li, Y., Liyanage, A., Tang, L., Walton, T., Ye, Z., Yuan, L., Zhu, L., Baturin, P., Boeglin, W., Dhamija, S., Markowitz, P., Raue, B., Reinhold, J., Hungerford, Ed.V., Ent, R., Fenker, H., Gaskell, D., Horn, T., Jones, M., Smith, G., Vulcan, W., Wood, S.A., Johnston, C., Simicevic, N., Wells, S., Samanta, C., Hu, B., Shen, J., Wang, W., Zhang, X., Zhang, Y., Feng, J., Fu, Y., Zhou, J., Zhou, S., Jiang, Y., Lu, H., Yan, X., Ye, Y., Gan, L., Ahmidouch, A., Danagoulian, S., Gasparian, A., Elaasar, M., Wesselmann, F.R., Asaturyan, A., Margaryan, A., Mkrtchyan, A., Mkrtchyan, H., Tadevosyan, V., Androic, D., Furic, M., Petkovic, T., Seva, T., Niculescu, G., Niculescu, I., Rodriguez, V.M., Cisbani, E., Cusanno, F., Garibaldi, F., Uuciuoli, G.M., De Leo, R., Maronne, S., Achenback, P., and Pochodzala, J.

Published
2010
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223. miR-130a activates the VEGFR2/STAT3/HIF1α axis to potentiate the vasoregenerative capacity of endothelial colony-forming cells in hypoxia

Author

Joana Mendes Lopes de Melo, James Bojdo, Rachel H. Church, Stuart McKeown, Christina L. O'Neill, Sarah Chambers, Kiran J McLoughlin, Reinhold J. Medina, Varun Pathak, Edoardo Pedrini, Alan W. Stitt, Jasenka Guduric-Fuchs, and Judith Lechner

Subjects
0301 basic medicine, Endothelium, endothelium, Angiogenesis, 03 medical and health sciences, angiogenesis, 0302 clinical medicine, Mediator, Downregulation and upregulation, vascular repair, Drug Discovery, microRNA, ECFC, endothelial, medicine, STAT3, miRNA, biology, Chemistry, hypoxia, lcsh:RM1-950, Hypoxia (medical), Cell biology, Endothelial stem cell, 030104 developmental biology, medicine.anatomical_structure, lcsh:Therapeutics. Pharmacology, endothelial progenitor, 030220 oncology & carcinogenesis, biology.protein, endothelial cell, Molecular Medicine, Original Article, medicine.symptom
Abstract

Hypoxia modulates reparative angiogenesis, which is a tightly regulated pathophysiological process. MicroRNAs (miRNAs) are important regulators of gene expression in hypoxia and angiogenesis. However, we do not yet have a clear understanding of how hypoxia-induced miRNAs fine-tune vasoreparative processes. Here, we identify miR-130a as a mediator of the hypoxic response in human primary endothelial colony-forming cells (ECFCs), a well-characterized subtype of endothelial progenitors. Under hypoxic conditions of 1% O2, miR-130a gain-of-function enhances ECFC pro-angiogenic capacity in vitro and potentiates their vasoreparative properties in vivo. Mechanistically, miR-130a orchestrates upregulation of VEGFR2, activation of STAT3, and accumulation of HIF1α via translational inhibition of Ddx6. These findings unveil a new role for miR-130a in hypoxia, whereby it activates the VEGFR2/STAT3/HIF1α axis to enhance the vasoregenerative capacity of ECFCs., Graphical Abstract, Cell therapies are often delivered into hypoxic tissues, which limits cell survival and engraftment. Guduric-Fuchs et al. demonstrate that miR-130a, enhanced endothelial colony-forming cells (ECFCs) function under hypoxia via activation of the VEGFR2/STAT3/HIF1α axis. miR-130a modulation in ECFCs offers an effective strategy to enhance their vasoreparative properties under hypoxia.

Published
2021

229. Decay Pion Spectroscopy of Electro-Produced Hypernuclei

Author

Tsukada, K., Achenbach, P., Ayerbe Gayoso, C., Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Debenjak, L., Distler, M., Esser, A., Friščić, I., Fujii, Y., Gogami, T., Gomez, M., Hashimoto, O., Hirose, S., Kim, E., Margaryan, A., Merkel, H., Müller, U., Nagao, S., Nakamura, S. N., Pochodzalla, J., Rappold, C., Reinhold, J., Sanchez Lorente, A., Saito, T., Schlimme, B. S., Schoth, M., Schulz, F., Sfienti, C., Širca, S., and Tang, L.

Published
2013
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231. Measurement of beam asymmetry for π−Δ++ photoproduction on the proton at Eγ = 8.5 GeV

Author

Adhikari, S., Akondi, C. S., Ali, A., Amaryan, M., Asaturyan, A., Austregesilo, A., Baldwin, Z., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Beattie, T. D., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Britton, T., Brooks, W. K., Cannon, B. E., Chudakov, E., Cole, S., Cortes, O., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Egiyan, H., Erbora, T., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Fitches, J., Foda, A. M., Furletov, S., Gan, L., Gao, H., Gasparian, A., Gleason, C., Goetzen, K., Goryachev, V. S., Guo, L., Hakobyan, H., Hamdi, A., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jaegle, I., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Khachatryan, V., Khatchatryan, M., Kourkoumelis, C., Kuleshov, S., LaDuke, A., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W. B., Liu, B., Livingston, K., Lolos, G. J., Luckas, K., Lyubovitskij, V., Mack, D., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mizutani, K., Neelamana, V., Nerling, F., Ng, L., Ostrovidov, A. I., Papandreou, Z., Paudel, C., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Phelps, W., Pooser, E., Reinhold, J., Ritchie, B. G., Ritman, J., Rodriguez, G., Romanov, D., Romero, C., Salgado, C., Schadmand, S., Schertz, A. M., Schick, A., Schumacher, R. A., Schwiening, J., Shen, X., Shepherd, M. R., Smith, A., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Sumner, B., Suresh, K., Tarasov, V. V., Taylor, S., Teymurazyan, A., Thiel, A., Vasileiadis, G., Whitlatch, T., Wickramaarachchi, N., Williams, M., Yang, Y., Zarling, J., Zhang, Z., Zhao, Z., Zhou, J., Zhou, Q., Zhou, X., and Zihlmann, B.

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

We report a measurement of the \ud π\ud −\ud photoproduction beam asymmetry for the reaction \ud →\ud γ\ud p\ud →\ud π\ud −\ud Δ\ud +\ud +\ud using data from the GlueX experiment in the photon beam energy range 8.2–8.8 GeV. The asymmetry \ud Σ\ud is measured as a function of four-momentum transfer \ud t\ud to the \ud Δ\ud +\ud +\ud and compared to phenomenological models. We find that \ud Σ\ud varies as a function of \ud t\ud : negative at smaller values and positive at higher values of \ud |\ud t\ud |\ud . The reaction can be described theoretically by \ud t\ud -channel particle exchange requiring pseudoscalar, vector, and tensor intermediaries. In particular, this reaction requires charge exchange, allowing us to probe pion exchange and the significance of higher-order corrections to one-pion exchange at low momentum transfer. Constraining production mechanisms of conventional mesons may aid in the search for and study of unconventional mesons. This is the first measurement of the process at this energy.

Published
2021

232. Measurement of beam asymmetry for π − Δ + + photoproduction on the proton at E γ = 8.5 GeV

Author

GlueX Collaboration, Adhikari, S., Akondi, C. S., Ali, A., Amaryan, M., Asaturyan, A., Austregesilo, A., Baldwin, Z., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Beattie, T. D., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Britton, T., Brooks, W. K., Cannon, B. E., Chudakov, E., Cole, S., Cortes, O., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Egiyan, H., Erbora, T., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Fitches, J., Foda, A. M., Furletov, S., Gan, L., Gao, H., Gasparian, A., Gleason, C., Goetzen, K., Goryachev, V. S., Guo, L., Hakobyan, H., Hamdi, A., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jaegle, I., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Khachatryan, V., Khatchatryan, M., Kourkoumelis, C., Kuleshov, S., LaDuke, A., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W. B., Liu, B., Livingston, K., Lolos, G. J., Luckas, K., Lyubovitskij, V., Mack, D., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mizutani, K., Neelamana, V., Nerling, F., Ng, L., Ostrovidov, A. I., Papandreou, Z., Paudel, C., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Phelps, W., Pooser, E., Reinhold, J., Ritchie, B. G., Ritman, J., Rodriguez, G., Romanov, D., Romero, C., Salgado, C., Schadmand, S., Schertz, A. M., Schick, A., Schumacher, R. A., Schwiening, J., Shen, X., Shepherd, M. R., Smith, A., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Sumner, B., Suresh, K., Tarasov, V. V., Taylor, S., Teymurazyan, A., Thiel, A., Vasileiadis, G., Whitlatch, T., Wickramaarachchi, N., Williams, M., Yang, Y., Zarling, J., Zhang, Z., Zhao, Z., Zhou, J., Zhou, Q., Zhou, X., and Zihlmann, B.

Subjects
Nuclear Theory, High Energy Physics::Experiment, ddc:530, Nuclear Experiment, High Energy Physics - Experiment
Abstract

We report a measurement of the $\pi^-$ photoproduction beam asymmetry for the reaction $\vec{\gamma} p \rightarrow \pi^- \Delta^{++}$ using data from the GlueX experiment in the photon beam energy range 8.2--8.8 GeV. The asymmetry $\Sigma$ is measured as a function of four-momentum transfer $t$ to the $\Delta^{++}$ and compared to phenomenological models. We find that $\Sigma$ varies as a function of $t$: negative at smaller values and positive at higher values of $|t|$. The reaction can be described theoretically by $t$-channel particle exchange requiring pseudoscalar, vector, and tensor intermediaries. In particular, this reaction requires charge exchange, allowing us to probe pion exchange and the significance of higher-order corrections to one-pion exchange at low momentum transfer. Constraining production mechanisms of conventional mesons may aid in the search for and study of unconventional mesons. This is the first measurement of the process at this energy., Comment: 7 pages, 5 figures

Published
2021

233. Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV

Author

Adhikari, S. Akondi, C.S. Ali, A. Amaryan, M. Asaturyan, A. Austregesilo, A. Baldwin, Z. Barbosa, F. Barlow, J. Barriga, E. Barsotti, R. Beattie, T.D. Berdnikov, V.V. Black, T. Boeglin, W. Briscoe, W.J. Britton, T. Brooks, W.K. Cannon, B.E. Chudakov, E. Cole, S. Cortes, O. Crede, V. Dalton, M.M. Daniels, T. Deur, A. Dobbs, S. Dolgolenko, A. Dotel, R. Dugger, M. Dzhygadlo, R. Egiyan, H. Erbora, T. Ernst, A. Eugenio, P. Fanelli, C. Fegan, S. Fitches, J. Foda, A.M. Furletov, S. Gan, L. Gao, H. Gasparian, A. Gleason, C. Goetzen, K. Goryachev, V.S. Guo, L. Hakobyan, H. Hamdi, A. Huber, G.M. Hurley, A. Ireland, D.G. Ito, M.M. Jaegle, I. Jarvis, N.S. Jones, R.T. Kakoyan, V. Kalicy, G. Kamel, M. Khachatryan, V. Khatchatryan, M. Kourkoumelis, C. Kuleshov, S. Laduke, A. Larin, I. Lawrence, D. Lersch, D.I. Li, H. Li, W.B. Liu, B. Livingston, K. Lolos, G.J. Luckas, K. Lyubovitskij, V. Mack, D. Marukyan, H. Matveev, V. McCaughan, M. McCracken, M. McGinley, W. Meyer, C.A. Miskimen, R. Mitchell, R.E. Mizutani, K. Neelamana, V. Nerling, F. Ng, L. Ostrovidov, A.I. Papandreou, Z. Paudel, C. Pauli, P. Pedroni, R. Pentchev, L. Peters, K.J. Phelps, W. Pooser, E. Reinhold, J. Ritchie, B.G. Ritman, J. Rodriguez, G. Romanov, D. Romero, C. Salgado, C. Schadmand, S. Schertz, A.M. Schick, A. Schumacher, R.A. Schwiening, J. Shen, X. Shepherd, M.R. Smith, A. Smith, E.S. Sober, D.I. Somov, A. Somov, S. Soto, O. Stevens, J.R. Strakovsky, I.I. Sumner, B. Suresh, K. Tarasov, V.V. Taylor, S. Teymurazyan, A. Thiel, A. Vasileiadis, G. Whitlatch, T. Wickramaarachchi, N. Williams, M. Yang, Y. Zarling, J. Zhang, Z. Zhao, Z. Zhou, J. Zhou, Q. Zhou, X. Zihlmann, B. The GlueX Collaboration

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

We report a measurement of the π- photoproduction beam asymmetry for the reaction γp→π-Δ++ using data from the GlueX experiment in the photon beam energy range 8.2-8.8 GeV. The asymmetry ς is measured as a function of four-momentum transfer t to the Δ++ and compared to phenomenological models. We find that ς varies as a function of t: negative at smaller values and positive at higher values of |t|. The reaction can be described theoretically by t-channel particle exchange requiring pseudoscalar, vector, and tensor intermediaries. In particular, this reaction requires charge exchange, allowing us to probe pion exchange and the significance of higher-order corrections to one-pion exchange at low momentum transfer. Constraining production mechanisms of conventional mesons may aid in the search for and study of unconventional mesons. This is the first measurement of the process at this energy. © 2021 American Physical Society.

Published
2021

234. Ruling out Color Transparency in Quasielastic $^{12}$C(e,e'p) up to $Q^2$ of 14.2 (GeV/c)$^2$

Author

Bhetuwal, D., Matter, J., Szumila-Vance, H., Kabir, M. L., Dutta, D., Ent, R., Abrams, D., Ahmed, Z., Aljawrneh, B., Alsalmi, S., Ambrose, R., Androic, D., Armstrong, W., Asaturyan, A., Assumin-Gyimah, K., Gayoso, C. Ayerbe, Bandari, A., Basnet, S., Berdnikov, V., Bhatt, H., Biswas, D., Boeglin, W. U., Bosted, P., Brash, E., Bukhari, M. H. S., Chen, H., Chen, J. P., Chen, M., Christy, E. M., Covrig, S., Craycraft, K., Danagoulian, S., Day, D., Diefenthaler, M., Dlamini, M., Dunne, J., Duran, B., Evans, R., Fenker, H., Fomin, N., Fuchey, E., Gaskell, D., Gautam, T. N., Gonzalez, F. A., Hansen, J. O., Hauenstein, F., Hernandez, A. V., Horn, T., Huber, G. M., Jones, M. K., Joosten, S., Karki, A., Keppel, C., Khanal, A., King, P. M., Kinney, E., Ko, H. S., Kohl, M., Lashley-Colthirst, N., Li, S., Li, W. B., Liyanage, A. H., Mack, D., Malace, S., Markowitz, P., Meekins, D., Michaels, R., Mkrtchyan, A., Mkrtchyan, H., Nazeer, S. J., Nanda, S., Niculescu, G., Niculescu, I., Nguyen, D., Nuruzzaman, Pandey, B., Park, S., Pooser, E., Puckett, A., Rehfuss, M., Reinhold, J., Santiesteban, N., Sawatzky, B., Smith, G. R., Sun, A., Tadevosyan, V., Trotta, R., Wood, S. A., Yero, C., Zhang, J., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Hall C

Subjects
Nuclear Theory, carbon: target, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], FOS: Physical sciences, color: transparency, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], High Energy Physics - Experiment, Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], p: recoil, Nuclear Experiment (nucl-ex), Nuclear Experiment, yield: measured, Nuclear Physics, nucleus: target, electron nucleus: scattering, momentum transfer, p: momentum, inelastic scattering, impulse approximation: plane wave, quantum chromodynamics: effect, nucleus: transparency, experimental results, Jefferson Lab
Abstract

Quasielastic $^{12}$C$(e,e'p)$ scattering was measured at space-like 4-momentum transfer squared $Q^2$~=~8, 9.4, 11.4, and 14.2 (GeV/c)$^2$, the highest ever achieved to date. Nuclear transparency for this reaction was extracted by comparing the measured yield to that expected from a plane-wave impulse approximation calculation without any final state interactions. The measured transparency was consistent with no $Q^2$ dependence, up to proton momenta of 8.5~GeV/c, ruling out the quantum chromodynamics effect of color transparency at the measured $Q^2$ scales in exclusive $(e,e'p)$ reactions. These results impose strict constraints on models of color transparency for protons., 5 pages, 2 figures

Published
2021

235. Spectroscopy of A=9 hyperlithium with the (e,eK+) reaction

Author

Gogami, T., Chen, C., Kawama, D., Achenbach, P., Ahmidouch, A., Albayrak, I., Androić, Darko, Asaturyan, A., Asaturyan, R., Ates, O., Baturin, P., Badui, R., Boeglin, W., Bono, J., Brash, E., Carter, P., Chiba, A., Christy, E., Danagoulian, S., De Leo, R., Doi, D., Elaasar, M., Ent, R., Fujii, Y., Fujita, M., Furic, Miroslav, Gabrielyan, M., Gan, L., Garibaldi, F., Gaskell, D., Gasparian, A., Han, Y., Hashimoto, O., Horn, T., Hu, B., Hungerford, Ed.V., Jones, M., Kanda, H., Kaneta, M., Kato, S., Kawai, M., Khanal, H., Kohl, M., Liyanage, A., Luo, W., Maeda, K., Margaryan, A., Markowitz, P., Maruta, T., Matsumura, A., Maxwell, V., Meekins, D., Mkrtchyan, A., Mkrtchyan, H., Nagao, S., Nakamura, S.N., Narayan, A., Neville, C., Niculescu, G., Niculescu, M.I., Nunez, A., Nuruzzaman, Okayasu, Y., Petković, Tomislav, Pochodzalla, J., Qiu, X., Reinhold, J., Rodriguez, V.M., Samanta, C., Sawatzky, B., Ševa, Tomislav, Shichijo, A., Tadevosyan, V., Tang, L., Taniya, N., Tsukada, K., Veilleux, M., Vulcan, W., Wesselmann, F.R., Wood, S.A., Yamamoto, T., Ya, L., Ye, Z., Yokota, K., Yuan, L., Zhamkochyan, S., and Zhu, L.

Subjects
spectroscopy, hyperlithium, electroproduction, hypernucleus
Abstract

Missing mass spectroscopy with the (e, e K+) reaction was performed at Jefferson Laboratory’s Hall C for the neutron-rich hypernucleus 9 Li. The ground-state (g.s.) energy was obtained to be Bg.s. = 8.84 ± 0.17stat. ± 0.15sys. MeV by using shell-model calculations of a cross-section ratio and an energy separation of the spin doublet states (3/21+ and 5/21+). In addition, peaks that are considered to be states of [8Li(3+) ⊗ s = 3/22+, 1/2+] and [8Li(1+ ) ⊗ s = 5/22+, 7/2+] were observed at E (no. 2) = 1.74 ± 0.27stat. ± 0.11sys. and E (no. 3) = 3.30 ± 0.24stat. ± 0.11sys. MeV, respectively. The E (no. 3) is larger than shell-model predictions by a few hundred keV, and the difference would indicate that a 5He + t structure is more developed for the 3+ state than those for the 2+ and 1+ states in a core nucleus 8Li as a cluster model calculation suggests

Published
2021

236. A status report on the instruments for ESO’s Extremely Large Telescope

Author

Sylvain Oberti, Elizabeth George, Suzanne Ramsay, Ulf Seemann, Christian Schmid, Ralf Siebenmorgen, Christoph Frank, Joel Vernet, Ralf Conzelmann, Juan Carlos Gonzalez Herrera, Sebastian Egner, Paola Amico, Bertrand Koehler, Johannes Schimpelsberger, Frédéric Gonté, Derek Ives, Peter Hammersley, Naidu Bezawada, Christoph Haupt, Fabio Biancat Marchet, Florian Kerber, Michele Cirasuolo, Gerd Jakob, Reinhold J. Dorn, Roberto Tamai, and Patrick Caillier

Subjects
Class (computer programming), Observatory, Computer science, Optical instrumentation, Systems engineering, Extremely Large Telescope, Status report, Adaptive optics
Abstract

In this paper we will give an overview of the status of the three instruments and one adaptive optics module that are currently under construction for the European Southern Observatory (ESO) Extremely Large Telescope (ELT). Currently three of those instruments are in the final design stages and the adaptive optics module, MAORY, is rapidly approaching its Preliminary Design Review (PDR). Funding for the laser tomographic module for HARMONI has been secured and that module is now included as part of that overall instrument project. The PDR phase of the instruments has strongly highlighted the ambitious nature of these and all 30-m class instrument projects. Scientifically, managerially and technically, the step up from the 8-m class is challenging. This paper will provide an introduction to all these instruments and will highlight some of the important developments required to realise them.

Published
2020

238. Hypernuclear spectroscopy program at JLab Hall C

Author

Hashimoto, O., Nakamura, S.N., Acha, A., Ahmidouch, A., Androic, D., Asaturyan, A., Asaturyan, R., Baker, O.K., Baturin, P., Benmokhtar, F., Bosted, P., Carlini, R., Chen, X., Christy, M., Cole, L., Danagoulian, S., Daniel, A., Dharmawardane, V., Egiyan, K., Elaasar, M., Ent, R., Fenker, H., Fujii, Y., Furic, M., Gan, L., Gaskell, D., Gasparian, A., Gibson, E.F., Gueye, P., Halkyard, R., Honda, D., Horn, T., Hu, B., Hu, S., Hungerford, Ed V., Ispiryan, M., Johnston, K., Jones, M., Kalantarians, N., Kaneta, M., Kato, F., Kato, S., Kawama, D., Keppel, C., Li, Y., Luo, W., Mack, D., Margaryan, A., Marikyan, G., Maruyama, N., Matsumura, A., Miyoshi, T., Mkrtchyan, A., Mkrtchyan, H., Navasardyan, T., Niculescu, G., Niculescu, M.-I., Nomura, H., Nonaka, K., Ohtani, A., Okayasu, Y., Pamela, P., Perez, N., Petkovic, T., Randeniya, S., Reinhold, J., Rivera, R., Roche, J., Rodriguez, V.M., Sato, Y., Seva, T., Tang, L., Simicevic, N., Smith, G., Sumihama, M., Song, Y., Tadevosyan, V., Takahashi, T., Tamura, H., Tvaskis, V., Vulcan, W., Wang, B., Wells, S., Wood, S., Yan, C., Yuan, L., and Zamkochian, S.

Published
2008
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240. Kaon, pion, and proton associated photofission of Bi nuclei

Author

Song, Y., Margaryan, A., Acha, A., Ahmidouch, A., Androic, D., Asaturyan, A., Asaturyan, R., Baker, O. K., Baturin, P., Benmokhtar, F., Carlini, R., Chen, X., Christy, M., Cole, L., Danagoulian, S., Daniel, A., Dharmawardane, V., Egiyan, K., Elaasar, M., Ent, R., Fenker, H., Fujii, Y., Furic, M., Gan, L., Gaskell, D., Gasparian, A., Gibson, E. F., Grigoryan, N., Gueye, P., Halkyard, R., Hashimoto, O., Honda, D., Horn, T., Hu, B., Hu, S., Hungerford, Ed. V., Ispiryan, M., Johnston, K., Jones, M., Kalantarians, N., Kaneta, M., Kato, F., Kato, S., Kawama, D., Keppel, C., Knyazyan, S., Li, Y., Luo, W., Mack, D., Marikyan, G., Maruyama, N., Matsumura, A., Miyoshi, T., Mkrtchyan, A., Mkrtchyan, H., Nakamura, S. N., Navasardyan, T., Niculescu, G., Niculescu, M. -I., Nomura, H., Nonaka, K., Ohtani, A., Okayasu, Y., Pamela, P., Parlakyan, L., Perez, N., Petkovic, T., Randeniya, S., Reinhold, J., Rivera, R., Roche, J., Rodriguez, V. M., Sato, Y., Seva, T., Simicevic, N., Smith, G., Sumihama, M., Tadevosyan, V., Takahashi, T., Tamura, H., Tang, L., Tvaskis, V., Vardanyan, H., Vulcan, W., Wang, B., Wells, S., Wood, S., Yan, C., and Yuan, L.

Published
2010
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241. Measurement of the photon beam asymmetry in γ⃗p→K+Σ0 at Eγ = 8.5 GeV

Author

Adhikari, S., Ali, A., Amaryan, M., Austregesilo, A., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Beattie, T. D., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Britton, T., Brooks, W. K., Cannon, B. E., Cao, N., Chudakov, E., Cole, S., Cortes, O., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Egiyan, H., Erbora, T., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Foda, A. M., Foote, J., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gleason, C., Goetzen, K., Goncalves, A., Goryachev, V. S., Guo, L., Hakobyan, H., Hamdi, A., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Kourkoumelis, C., Kuleshov, S., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W., Liu, B., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., Meyer, C. A., Miskimen, R., Mitchell, R. E., Nerling, F., Ng, L., Ni, H., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Paudel, C., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Phelps, W., Pooser, E., Qin, N., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Romero, C., Salgado, C., Schertz, A. M., Schumacher, R. A., Schwiening, J., Seth, K. K., Shen, X., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Suresh, K., Tarasov, V. V., Taylor, S., Teymurazyan, A., Thiel, A., Vasileiadis, G., Whitlatch, T., Wickramaarachchi, N., Williams, M., Xiao, T., Yang, Y., Zarling, J., Zhang, Z., Zhou, Q., Zhou, X., and Zihlmann, B.

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

We report measurements of the photon beam asymmetry \ud Σ\ud for the reaction \ud γ⃗p→K+Σ0\ud (1193) using the GlueX spectrometer in Hall D at Jefferson Lab. Data were collected by using a linearly polarized photon beam in the energy range of 8.2–8.8 GeV incident on a liquid hydrogen target. The beam asymmetry \ud Σ\ud was measured as a function of the Mandelstam variable \ud t\ud , and a single value of \ud Σ\ud was extracted for events produced in the \ud u\ud channel. These are the first exclusive measurements of the photon beam asymmetry \ud Σ\ud for the reaction in this energy range. For the \ud t\ud channel, the measured beam asymmetry is close to unity over the \ud t\ud range studied, \ud −\ud t\ud =\ud (\ud 0.1\ud –\ud 1.4\ud )\ud (\ud GeV\ud /\ud c\ud )\ud 2\ud , with an average value of \ud Σ\ud =\ud 1.00\ud ±\ud 0.05\ud . This agrees with theoretical models that describe the reaction via the natural-parity exchange of the \ud K\ud ∗\ud (892) Regge trajectory. A value of \ud Σ\ud =\ud 0.41\ud ±\ud 0.09\ud is obtained for the \ud u\ud channel integrated up to \ud −\ud u\ud =\ud 2.0\ud (\ud GeV\ud /\ud c\ud )\ud 2\ud .

Published
2020

242. Tibetan PHD2, an allele with loss-of-function properties

Author

Kyle B. Matchett, Terence R.J. Lappin, Tejvir S. Khurana, Melanie J. Percy, Abigail W. Bigham, Bradleigh E. Navalsky, Daisheng Song, Reinhold J. Medina, James S. O. McCullagh, Wei Guan, Cassandra Ingersoll, John Walsby-Tickle, Frank S. Lee, Emanuele Loro, Lydia Eeles, and Tao Wang

Subjects
0301 basic medicine, Hypoxic ventilatory response, medicine.disease_cause, Tibet, Hypoxia-Inducible Factor-Proline Dioxygenases, 03 medical and health sciences, Mice, 0302 clinical medicine, Loss of Function Mutation, medicine, Hypoxia-Inducible Factor Pathway, Basic Helix-Loop-Helix Transcription Factors, Animals, Humans, Allele, Selection, Genetic, Hypoxia, Loss function, Alleles, Genetics, Mice, Knockout, Mutation, Multidisciplinary, biology, Altitude, EPAS1, Biological Sciences, Adaptation, Physiological, DNA-Binding Proteins, 030104 developmental biology, Phenotype, biology.protein, Haploinsufficiency, 030217 neurology & neurosurgery, EGLN1
Abstract

Tibetans have adapted to the chronic hypoxia of high altitude and display a distinctive suite of physiologic adaptations, including augmented hypoxic ventilatory response and resistance to pulmonary hypertension. Genome-wide studies have consistently identified compelling genetic signatures of natural selection in two genes of the Hypoxia Inducible Factor pathway, PHD2 and HIF2A. The product of the former induces the degradation of the product of the latter. Key issues regarding Tibetan PHD2 are whether it is a gain-of-function or loss-of-function allele, and how it might contribute to high-altitude adaptation. Tibetan PHD2 possesses two amino acid changes, D4E and C127S. We previously showed that in vitro, Tibetan PHD2 is defective in its interaction with p23, a cochaperone of the HSP90 pathway, and we proposed that Tibetan PHD2 is a loss-of-function allele. Here, we report that additional PHD2 mutations at or near Asp-4 or Cys-127 impair interaction with p23 in vitro. We find that mice with the Tibetan Phd2 allele display augmented hypoxic ventilatory response, supporting this loss-of-function proposal. This is phenocopied by mice with a mutation in p23 that abrogates the PHD2:p23 interaction. Hif2a haploinsufficiency, but not the Tibetan Phd2 allele, ameliorates hypoxia-induced increases in right ventricular systolic pressure. The Tibetan Phd2 allele is not associated with hemoglobin levels in mice. We propose that Tibetans possess genetic alterations that both activate and inhibit selective outputs of the HIF pathway to facilitate successful adaptation to the chronic hypoxia of high altitude.

Published
2020

243. Recent Advances in Endothelial Progenitor Cells Toward Their Use in Clinical Translation

Author

Reinhold J. Medina and David M. Smadja

Subjects
lcsh:R5-920, endothelial colony forming cell, Angiogenesis, Translation (biology), General Medicine, Biology, Endothelial colony forming cell, Endothelial progenitor cell, Cell biology, angiogenesis, Editorial, endothelial progenitor cell, endothelial progenitor, therapeutic angiogenesis, vascular repair, ECFC, Medicine, Therapeutic angiogenesis, Progenitor cell, lcsh:Medicine (General)
Published
2020

244. Measurement of the photon beam asymmetry in γ - p→K+ ς0 at Eγ=8.5 GeV

Author

Adhikari, S. Ali, A. Amaryan, M. Austregesilo, A. Barbosa, F. Barlow, J. Barriga, E. Barsotti, R. Beattie, T.D. Berdnikov, V.V. Black, T. Boeglin, W. Briscoe, W.J. Britton, T. Brooks, W.K. Cannon, B.E. Cao, N. Chudakov, E. Cole, S. Cortes, O. Crede, V. Dalton, M.M. Daniels, T. Deur, A. Dobbs, S. Dolgolenko, A. Dotel, R. Dugger, M. Dzhygadlo, R. Egiyan, H. Erbora, T. Ernst, A. Eugenio, P. Fanelli, C. Fegan, S. Foda, A.M. Foote, J. Frye, J. Furletov, S. Gan, L. Gasparian, A. Gleason, C. Goetzen, K. Goncalves, A. Goryachev, V.S. Guo, L. Hakobyan, H. Hamdi, A. Huber, G.M. Hurley, A. Ireland, D.G. Ito, M.M. Jarvis, N.S. Jones, R.T. Kakoyan, V. Kalicy, G. Kamel, M. Kourkoumelis, C. Kuleshov, S. Larin, I. Lawrence, D. Lersch, D.I. Li, H. Li, W. Liu, B. Livingston, K. Lolos, G.J. Lyubovitskij, V. Mack, D. Marukyan, H. Matveev, V. Mccaughan, M. Mccracken, M. Mcginley, W. Meyer, C.A. Miskimen, R. Mitchell, R.E. Nerling, F. Ng, L. Ni, H. Ostrovidov, A.I. Papandreou, Z. Patsyuk, M. Paudel, C. Pauli, P. Pedroni, R. Pentchev, L. Peters, K.J. Phelps, W. Pooser, E. Qin, N. Reinhold, J. Ritchie, B.G. Robison, L. Romanov, D. Romero, C. Salgado, C. Schertz, A.M. Schumacher, R.A. Schwiening, J. Seth, K.K. Shen, X. Shepherd, M.R. Smith, E.S. Sober, D.I. Somov, A. Somov, S. Soto, O. Stevens, J.R. Strakovsky, I.I. Suresh, K. Tarasov, V.V. Taylor, S. Teymurazyan, A. Thiel, A. Vasileiadis, G. Whitlatch, T. Wickramaarachchi, N. Williams, M. Xiao, T. Yang, Y. Zarling, J. Zhang, Z. Zhou, Q. Zhou, X. Zihlmann, B.

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

We report measurements of the photon beam asymmetry ς for the reaction γ - p→K+ς0(1193) using the GlueX spectrometer in Hall D at Jefferson Lab. Data were collected by using a linearly polarized photon beam in the energy range of 8.2-8.8 GeV incident on a liquid hydrogen target. The beam asymmetry ς was measured as a function of the Mandelstam variable t, and a single value of ς was extracted for events produced in the u channel. These are the first exclusive measurements of the photon beam asymmetry ς for the reaction in this energy range. For the t channel, the measured beam asymmetry is close to unity over the t range studied, -t=(0.1-1.4)(GeV/c)2, with an average value of ς=1.00±0.05. This agrees with theoretical models that describe the reaction via the natural-parity exchange of the K∗(892) Regge trajectory. A value of ς=0.41±0.09 is obtained for the u channel integrated up to -u=2.0 (GeV/c)2. © 2020 American Physical Society.

Published
2020

245. Measurement of beam asymmetry for $��^-��^{++}$ photoproduction on the proton at $E_��$=8.5 GeV

Author

GlueX Collaboration, Adhikari, S., Akondi, C. S., Ali, A., Amaryan, M., Asaturyan, A., Austregesilo, A., Baldwin, Z., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Beattie, T. D., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Britton, T., Brooks, W. K., Cannon, B. E., Chudakov, E., Cole, S., Cortes, O., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Egiyan, H., Erbora, T., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Fitches, J., Foda, A. M., Furletov, S., Gan, L., Gao, H., Gasparian, A., Gleason, C., Goetzen, K., Goryachev, V. S., Guo, L., Hakobyan, H., Hamdi, A., Huber, G. M., Hurley, A., Ireland, D. G., Ito, M. M., Jaegle, I., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kalicy, G., Kamel, M., Khachatryan, V., Khatchatryan, M., Kourkoumelis, C., Kuleshov, S., LaDuke, A., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W. B., Liu, B., Livingston, K., Lolos, G. J., Luckas, K., Lyubovitskij, V., Mack, D., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mizutani, K., Neelamana, V., Nerling, F., Ng, L., Ostrovidov, A. I., Papandreou, Z., Paudel, C., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Phelps, W., Pooser, E., Reinhold, J., Ritchie, B. G., Ritman, J., Rodriguez, G., Romanov, D., Romero, C., Salgado, C., Schadmand, S., Schertz, A. M., Schick, A., Schumacher, R. A., Schwiening, J., Shen, X., Shepherd, M. R., Smith, A., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Stevens, J. R., Strakovsky, I. I., Sumner, B., Suresh, K., Tarasov, V. V., Taylor, S., Teymurazyan, A., Thiel, A., Vasileiadis, G., Whitlatch, T., Wickramaarachchi, N., Williams, M., Yang, Y., Zarling, J., Zhang, Z., Zhao, Z., Zhou, J., Zhou, Q., Zhou, X., and Zihlmann, B.

Subjects
High Energy Physics - Experiment (hep-ex), Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We report a measurement of the $��^-$ photoproduction beam asymmetry for the reaction $\vec�� p \rightarrow ��^- ��^{++}$ using data from the GlueX experiment in the photon beam energy range 8.2--8.8 GeV. The asymmetry $��$ is measured as a function of four-momentum transfer $t$ to the $��^{++}$ and compared to phenomenological models. We find that $��$ varies as a function of $t$: negative at smaller values and positive at higher values of $|t|$. The reaction can be described theoretically by $t$-channel particle exchange requiring pseudoscalar, vector, and tensor intermediaries. In particular, this reaction requires charge exchange, allowing us to probe pion exchange and the significance of higher-order corrections to one-pion exchange at low momentum transfer. Constraining production mechanisms of conventional mesons may aid in the search for and study of unconventional mesons. This is the first measurement of the process at this energy., 7 pages, 5 figures

Published
2020
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248. The HKS experiment on Λ-hypernuclear spectroscopy via electroproduction at JLab

Author

Tang, L., Yuan, L., Acha, A., Ahmidouch, A., Androic, D., Asaturyan, A., Asaturyan, R., Baker, O.K., Baturin, P., Benmokhtar, F., Bosted, P., Carlini, R., Chen, X., Christy, M., Cole, L., Danagoulian, S., Daniel, A., Dharmawardane, V., Egiyan, K., Elaasar, M., Ent, R., Fenker, H., Fujii, Y., Furic, M., Gan, L., Gaskell, D., Gasparian, A., Gibson, Ed.F., Gueye, P., Halkyard, R., Hashimoto, O., Honda, D., Horn, T., Hu, B., Hu, S., Hungerford, Ed.V., Ispiryan, M., Johnston, K., Jones, M., Kalantarians, N., Kaneta, M., Kato, F., Kato, S., Kawama, D., Kepple, C., Li, Y., Luo, W., Mack, D., Margaryan, A., Marikyan, G., Maruyama, N., Matsumura, A., Miyoshi, T., Mkrtchyan, A., Mkrtchyan, H., Nakamura, S.N., Navasardyan, T., Niculescu, G., Niculescu, M.-I., Nomura, H., Nonaka, K., Ohtani, A., Okayasu, Y., Pamela, P., Perez, N., Petkovic, T., Randeniya, S., Reinhold, J., Rivera, R., Roche, J., Rodriguez, V.M., Sato, Y., Seva, T., Simicevic, N., Smith, G., Sumihama, M., Song, Y., Tadevosyan, V., Takahashi, T., Tamura, H., Tvaskis, V., Vulcan, W., Wang, B., Wells, S., Wood, S., Yan, C., and Zamkochian, S.

Published
2007
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249. A status report on the instruments for ESO’s Extremely Large Telescope

Author

Ramsay, Suzanne K., primary, Amico, Paola, additional, Bezawada, Naidu, additional, Biancat Marchet, Fabio, additional, Caillier, Patrick, additional, Cirasuolo, Michele, additional, Conzelmann, Ralf, additional, Dorn, Reinhold J., additional, Egner, Sebastian, additional, Frank, Christoph, additional, George, Elizabeth M., additional, Gonte, Frederic, additional, González Herrera, Juan Carlos, additional, Hammersley, Peter, additional, Haupt, Christoph, additional, Ives, Derek J., additional, Jakob, Gerd, additional, Kerber, Florian, additional, Koehler, Bertrand, additional, Oberti, Sylvain, additional, Schmid, Christian, additional, Schimpelsberger, Johannes, additional, Seemann, Ulf, additional, Siebenmorgen, Ralf, additional, Tamai, Roberto, additional, and Vernet, Joël D. R., additional

Published
2020
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250. Neutron electric form factor up to Q2 = 1.47 GeV/c2

Author

Madey, R., Semenov, A.Yu., Taylor, S., Aghalaryan, A., Crouse, E., MacLachlan, G., Plaster, B., Tajima, S., Tireman, W., Yan, Chenyu, Ahmidouch, A., Anderson, B.D., Arenhövel, H., Asaturyan, R., Baker, O., Baldwin, A.R., Breuer, H., Carlini, R., Christy, E., Churchwell, S., Cole, L., Danagoulian, S., Day, D., Elaasar, M., Ent, R., Farkhondeh, M., Fenker, H., Finn, J.M., Gan, L., Garrow, K., Gueye, P., Howell, C., Hu, B., Jones, M.K., Kelly, J.J., Keppel, C., Khandaker, M., Kim, W.-Y., Kowalski, S., Lung, A., Mack, D., Manley, D.M., Markowitz, P., Mitchell, J., Mkrtchyan, H., Opper, A., Perdrisat, C., Punjabi, V., Raue, B., Reichelt, T., Reinhold, J., Roche, J., Sato, Y., Semenova, I.A., Seo, W., Simicevic, N., Smith, G., Stepanyan, S., Tadevosyan, V., Tang, L., Ulmer, P., Vulcan, W., Watson, J.W., Wells, S., Wesselmann, F., Wood, S., Yan, Chen, Yang, S., Yuan, L., Zhang, W.-M., Zhu, H., and Zhu, X.

Published
2003
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