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54. Cross Section for $��n \to ��^0 n$ measured at Mainz/A2

Author

Briscoe, W. J., Hadzimehmedovi, M., Kudryavtsev, A. E., Kulikov, V. V., Martemianov, M. A., Strakovsky, I. I., Svarc, A., Tarasov, V. E., Workman, R. L., Abt, S., Achenbach, P., Akondi, C. S., Afzal, F., Aguar-Bartolome, P., Ahmed, Z., Annand, J. R. M., Arends, H. J., Bantawa, K., Bashkanov, M., Beck, R., Biroth, M., Borisov, N., Braghieri, A., Bulychjov, S. A., Cividini, F., Collicott, C., Costanza, S., Denig, A., Downie, E. J., Drexler, P., Fegan, S., Bondy, M. I. Ferretti, Gardner, S., Ghosal, D., Glazier, D. I., Gorodnov, I., Gradl, W., Gunther, M., Gurevich, D., Heijkenskjold, L., Hornidge, D., Huber, G. M., Kaeser, M., Kashevarov, V. L., Kay, S., Korolija, M., Krusche, B., Lazarev, A., Livingston, K., Lutterer, S., MacGregor, I. J. D., Macrae, R., Manley, D. M., Martel, P. P., McGeorge, J. C., Middleton, D. G., Miskimen, R., Mornacchi, E., Mushkarenkov, A., Mullen, C., Neganov, A., Neiser, A., Ostrick, M., Otte, P. B., Osmanovic, H., Oussena, R. Omerovic B., Paudyal, D., Pedroni, P., Powell, A., Prakhov, S. N., Ron, G., Rostomyan, T., Sarty, A., Senti, C., Sokhoyan, V., Spieker, K., Stahov, J., Steffen, O., Supek, I., Thiel, A., Thiel, M., Thomas, A., Tiator, L., Unverzagt, M., Usov, Yu. A., Walford, N. K., Watts, D. P., Wagner, S., Werthmueller, D., Wettig, J., Wolfes, M., and Zachariou, N.

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

The $��n \to ��^0 n$ differential cross section evaluated for 27 energy bins span the photon-energy range 290-813 MeV (W = 1.195-1.553 GeV) and the pion c.m. polar production angles, ranging from 18 deg to 162 deg, making use of model-dependent nuclear corrections to extract pi0 production data on the neutron from measurements on the deuteron target. Additionally, the total photoabsorption cross section was measured. The tagged photon beam produced by the 883-MeV electron beam of the Mainz Microtron MAMI was used for the 0-meson production. Our accumulation of 3.6 x 10^6 $��n \to ��^0 n$ events allowed a detailed study of the reaction dynamics. Our data are in reasonable agreement with previous A2 measurements and extend them to lower energies. The data are compared to predictions of previous SAID, MAID, and BnGa partial-wave analyses and to the latest SAID fit MA19 that included our data. Selected photon decay amplitudes $N^* \to ��n$ at the resonance poles are determined for the first time., 16 pages, 12 figures, 3 tables

Published
2019
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55. Cross section for γn→π0n measured at the Mainz A2 experiment

Author

Briscoe, W. J., Hadžimehmedović, M., Kudryavtsev, A. E., Kulikov, V. V., Martemianov, M. A., Strakovsky, I. I., Švarc, Alfred, Tarasov, V. E., Workman, R. L., Abt, S., Achenbach, P., Akondi, C. S., Afzal, F., Aguar-Bartolomé, P., Ahmed, Z., Annand, J. R. M., Arends, H. J., Bantawa, K., Bashkanov, M., Beck, R., Biroth, M., Borisov, N., Braghieri, A., Bulychjov, S. A., Cividini, F., Collicott, C., Costanza, S., Denig, A., Downie, E. J., Drexler, P., Fegan, S., Ferretti Bondy, M. I., Gardner, S., Ghosal, D., Glazier, D. I., Gorodnov, I., Gradl, W., Günther, M., Gurevich, D., Heijkenskjöld, L., Hornidge, D., Huber, G. M., Käser, A., Kashevarov, V. L., Kay, S., Korolija, Milorad, Krusche, B., Lazarev, A., Livingston, K., Lutterer, S., MacGregor, I. J. D., Macrae, R., Manley, D. M., Martel, P. P., McGeorge, J. C., Middleton, D. G., Miskimen, R., Mornacchi, E., Mushkarenkov, A., Mullen, C., Neganov, A., Neiser, A., Ostrick, M., Otte, P. B., Osmanović, H., Omerović, R., Oussena, B., Paudyal, D., Pedroni, P., Powell, A., Prakhov, S. N., Ron, G., Rostomyan, T., Sarty, A., Sfienti, C., Sokhoyan, V., Spieker, K., Stahov, J., Steffen, O., Supek, Ivan, Thiel, A., Thiel, M., Thomas, A., Tiator, L., Unverzagt, M., Usov, Yu. A., Walford, N. K., Watts, D. P., Wagner, S., Werthmüller, D., Wettig, J., Wolfes, M., and Zachariou, N.

Subjects
Physics, Nuclear Theory, neutral pion-photoproduction, tagged photon spectrometer, microtron, Nuclear Experiment
Abstract

The gamma n -> pi(0)n differential cross section evaluated for 27 energy bins span the photon-energy range 290-813 MeV (W = 1.195- 1.553 GeV) and the pion c.m. polar production angles, ranging from 18 degrees to 162 degrees, making use of model-dependent nuclear corrections to extract pi(0) production data on the neutron from measurements on the deuteron target. Additionally, the total photoabsorption cross section was measured. The tagged photon beam produced by the 883 MeV electron beam of the Mainz Microtron MAMI was used for the pi(0)-meson production. Our accumulation of 3.6 x 10(6) gamma n -> pi(0)n events allowed a detailed study of the reaction dynamics. Our data are in reasonable agreement with previous A2 measurements and extend them to lower energies. The data are compared with predictions of previous SAID, MAID, and BnGa partial-wave analyses and to the latest SAID fit MA19 that included our data. Selected photon-decay amplitudes N* -> gamma n at the resonance poles are determined for the first time.

Published
2019

63. THE CONCISE GUIDE TO PHARMACOLOGY 2019/20: G protein-coupled receptors

Author

Alexander, SPH, Christopoulos, A, Davenport, AP, Kelly, E, Mathie, A, Peters, JA, Veale, EL, Armstrong, JF, Faccenda, E, Harding, SD, Pawson, AJ, Sharman, JL, Southan, C, Davies, JA, Arumugam, TV, Bennett, A, Sjogren, B, Sobey, C, Wong, SS, Abbracchio, MP, Alexander, W, Al-hosaini, K, Back, M, Beaulieu, J-M, Bernstein, KE, Bettler, B, Birdsall, NJM, Blaho, V, Bousquet, C, Brauner-Osborne, H, Burnstock, G, Calo, G, Castano, JP, Catt, KJ, Ceruti, S, Chazot, P, Chiang, N, Chun, J, Cianciulli, A, Clapp, LH, Couture, R, Csaba, Z, Dent, G, Singh, KD, Douglas, SD, Dournaud, P, Eguchi, S, Escher, E, Filardo, E, Fong, TM, Fumagalli, M, Gainetdinov, RR, de Gasparo, M, Gershengorn, M, Gobeil, F, Goodfriend, TL, Goudet, C, Gregory, KJ, Gundlach, AL, Hamann, J, Hanson, J, Hauger, RL, Hay, D, Heinemann, A, Hollenberg, MD, Holliday, ND, Horiuchi, M, Hoyer, D, Hunyady, L, Husain, A, Ijzerman, AP, Inagami, T, Jacobson, KA, Jensen, RT, Jockers, R, Jonnalagadda, D, Karnik, S, Kaupmann, K, Kemp, J, Kennedy, C, Kihara, Y, Kozielewicz, P, Kreienkamp, H-J, Kukkonen, JP, Langenhan, T, Leach, K, Lecca, D, Lee, JD, Leeman, SE, Leprince, J, Lolait, SJ, Lupp, A, Macrae, R, Maguire, J, Mazella, J, McArdle, CA, Melmed, S, Michel, MC, Miller, L, Mitolo, V, Mouillac, B, Murphy, PM, Nahon, J-L, Norel, X, Nyimanu, D, O'Carroll, A-M, Offermanns, S, Panaro, MA, Pertwee, RG, Pin, J-P, Prossnitz, E, Ramachandran, R, Reinscheid, RK, Rondard, P, Rovati, GE, Ruzza, C, Sanger, G, Schoeneberg, T, Schulte, G, Schulz, S, Segaloff, DL, Serhan, CN, Stoddart, LA, Sugimoto, Y, Summers, R, Tan, V, Thomas, W, Timmermans, PBMWM, Tirupula, K, Tulipano, G, Unal, H, Unger, T, Vanderheyden, P, Vaudry, D, Vaudry, H, Vilardaga, J-P, Walker, CS, Ward, DT, Wester, H-J, Willars, GB, Williams, TL, Woodruff, TM, Yao, C, Aldrich, RW, Becirovic, E, Biel, M, Catterall, WA, Conner, AC, Davies, P, Delling, M, Di Virgilio, F, Falzoni, S, George, C, Goldstein, SAN, Grissmer, S, Ha, K, Hammelmann, V, Hanukoglu, I, Jarvis, M, Jensen, AA, Kaczmarek, LK, Kellenberger, S, King, B, Lynch, JW, Perez-Reyes, E, Plant, LD, Rash, LD, Ren, D, Sivilotti, LG, Smart, TG, Snutch, TP, Tian, J, Van den Eynde, C, Vriens, J, Wei, AD, Winn, BT, Wulff, H, Xu, H, Yue, L, Zhang, X, Zhu, M, Coons, L, Fuller, P, Korach, KS, Young, M, Bryant, C, Farndale, RW, Hobbs, A, Jarvis, GE, MacEwan, D, Monie, TP, Waldman, S, Beuve, A, Boison, D, Brouckaert, P, Burnett, JC, Burns, K, Dessauer, C, Friebe, A, Garthwaite, J, Gertsch, J, Helsby, N, Izzo, AA, Koesling, D, Kuhn, M, Ostrom, R, Papapetropoulos, A, Potter, LR, Pyne, NJ, Pyne, S, Russwurm, M, Schmidt, HHHW, Seifert, R, Stasch, J-P, Szabo, C, van der Stelt, M, van der Vliet, A, Watts, V, Anderson, CMH, Broer, S, Dawson, P, Hagenbuch, B, Hammond, JR, Hancox, J, Inui, K-I, Kanai, Y, Kemp, S, Thwaites, DT, Verri, T, Alexander, SPH, Christopoulos, A, Davenport, AP, Kelly, E, Mathie, A, Peters, JA, Veale, EL, Armstrong, JF, Faccenda, E, Harding, SD, Pawson, AJ, Sharman, JL, Southan, C, Davies, JA, Arumugam, TV, Bennett, A, Sjogren, B, Sobey, C, Wong, SS, Abbracchio, MP, Alexander, W, Al-hosaini, K, Back, M, Beaulieu, J-M, Bernstein, KE, Bettler, B, Birdsall, NJM, Blaho, V, Bousquet, C, Brauner-Osborne, H, Burnstock, G, Calo, G, Castano, JP, Catt, KJ, Ceruti, S, Chazot, P, Chiang, N, Chun, J, Cianciulli, A, Clapp, LH, Couture, R, Csaba, Z, Dent, G, Singh, KD, Douglas, SD, Dournaud, P, Eguchi, S, Escher, E, Filardo, E, Fong, TM, Fumagalli, M, Gainetdinov, RR, de Gasparo, M, Gershengorn, M, Gobeil, F, Goodfriend, TL, Goudet, C, Gregory, KJ, Gundlach, AL, Hamann, J, Hanson, J, Hauger, RL, Hay, D, Heinemann, A, Hollenberg, MD, Holliday, ND, Horiuchi, M, Hoyer, D, Hunyady, L, Husain, A, Ijzerman, AP, Inagami, T, Jacobson, KA, Jensen, RT, Jockers, R, Jonnalagadda, D, Karnik, S, Kaupmann, K, Kemp, J, Kennedy, C, Kihara, Y, Kozielewicz, P, Kreienkamp, H-J, Kukkonen, JP, Langenhan, T, Leach, K, Lecca, D, Lee, JD, Leeman, SE, Leprince, J, Lolait, SJ, Lupp, A, Macrae, R, Maguire, J, Mazella, J, McArdle, CA, Melmed, S, Michel, MC, Miller, L, Mitolo, V, Mouillac, B, Murphy, PM, Nahon, J-L, Norel, X, Nyimanu, D, O'Carroll, A-M, Offermanns, S, Panaro, MA, Pertwee, RG, Pin, J-P, Prossnitz, E, Ramachandran, R, Reinscheid, RK, Rondard, P, Rovati, GE, Ruzza, C, Sanger, G, Schoeneberg, T, Schulte, G, Schulz, S, Segaloff, DL, Serhan, CN, Stoddart, LA, Sugimoto, Y, Summers, R, Tan, V, Thomas, W, Timmermans, PBMWM, Tirupula, K, Tulipano, G, Unal, H, Unger, T, Vanderheyden, P, Vaudry, D, Vaudry, H, Vilardaga, J-P, Walker, CS, Ward, DT, Wester, H-J, Willars, GB, Williams, TL, Woodruff, TM, Yao, C, Aldrich, RW, Becirovic, E, Biel, M, Catterall, WA, Conner, AC, Davies, P, Delling, M, Di Virgilio, F, Falzoni, S, George, C, Goldstein, SAN, Grissmer, S, Ha, K, Hammelmann, V, Hanukoglu, I, Jarvis, M, Jensen, AA, Kaczmarek, LK, Kellenberger, S, King, B, Lynch, JW, Perez-Reyes, E, Plant, LD, Rash, LD, Ren, D, Sivilotti, LG, Smart, TG, Snutch, TP, Tian, J, Van den Eynde, C, Vriens, J, Wei, AD, Winn, BT, Wulff, H, Xu, H, Yue, L, Zhang, X, Zhu, M, Coons, L, Fuller, P, Korach, KS, Young, M, Bryant, C, Farndale, RW, Hobbs, A, Jarvis, GE, MacEwan, D, Monie, TP, Waldman, S, Beuve, A, Boison, D, Brouckaert, P, Burnett, JC, Burns, K, Dessauer, C, Friebe, A, Garthwaite, J, Gertsch, J, Helsby, N, Izzo, AA, Koesling, D, Kuhn, M, Ostrom, R, Papapetropoulos, A, Potter, LR, Pyne, NJ, Pyne, S, Russwurm, M, Schmidt, HHHW, Seifert, R, Stasch, J-P, Szabo, C, van der Stelt, M, van der Vliet, A, Watts, V, Anderson, CMH, Broer, S, Dawson, P, Hagenbuch, B, Hammond, JR, Hancox, J, Inui, K-I, Kanai, Y, Kemp, S, Thwaites, DT, and Verri, T

Abstract

The Concise Guide to PHARMACOLOGY 2019/20 is the fourth in this series of biennial publications. The Concise Guide provides concise overviews of the key properties of nearly 1800 human drug targets with an emphasis on selective pharmacology (where available), plus links to the open access knowledgebase source of drug targets and their ligands (www.guidetopharmacology.org), which provides more detailed views of target and ligand properties. Although the Concise Guide represents approximately 400 pages, the material presented is substantially reduced compared to information and links presented on the website. It provides a permanent, citable, point-in-time record that will survive database updates. The full contents of this section can be found at http://onlinelibrary.wiley.com/doi/10.1111/bph.14748. G protein-coupled receptors are one of the six major pharmacological targets into which the Guide is divided, with the others being: ion channels, nuclear hormone receptors, catalytic receptors, enzymes and transporters. These are presented with nomenclature guidance and summary information on the best available pharmacological tools, alongside key references and suggestions for further reading. The landscape format of the Concise Guide is designed to facilitate comparison of related targets from material contemporary to mid-2019, and supersedes data presented in the 2017/18, 2015/16 and 2013/14 Concise Guides and previous Guides to Receptors and Channels. It is produced in close conjunction with the International Union of Basic and Clinical Pharmacology Committee on Receptor Nomenclature and Drug Classification (NC-IUPHAR), therefore, providing official IUPHAR classification and nomenclature for human drug targets, where appropriate.

Published
2019

65. Dementia education in Higher Education Institutions, now and in the future: the role of the professional regulatory bodies in the UK

Author

Knifton, C, Macrae, R, Jack-Waugh, A, Brown, M, Surr, CA, Thompson, R, Baillie, L, Knifton, C, Macrae, R, Jack-Waugh, A, Brown, M, Surr, CA, Thompson, R, and Baillie, L

Abstract

Dementia is a global challenge and educating and upskilling the workforce is a policy imperative. A World Health Organisation priority area is the development of dementia knowledge and skills amongst health and social care professionals. The European Parliament has called for European countries to develop action plans and create common guidelines to provide education and training to professionals caring for people with dementia and their family caregivers. The inconsistencies and gaps in dementia education have been repeatedly highlighted internationally as well as in the United Kingdom (UK); this is despite the four home nations having voluntary frameworks and guidelines for dementia education. This perspectives article on dementia education is written by representatives of the Higher Education Dementia Network (HEDN), a well-established group of academics involved in dementia education and research in over 65 Higher Education Institutions across the UK. HEDN works collaboratively with Dementia UK to promote consistent, high quality dementia education and share best practice. At HEDN we believe that reference to the knowledge and skills frameworks of the four nations within Professional Regulatory Body (PRB) requirements would ensure a more rigorous and consistent approach to dementia education across the UK. Reference to the Frameworks would support their adoption as a required and monitored sector minimum standard across professional boundaries. HEDN therefore recommends that application of the knowledge and skills within these frameworks becomes a requirement for (re)validation/approval of relevant health, social and housing professional programmes. In this article we explain the rationale behind the recommendations made by HEDN and the implications for PRBs and Higher Education Institutions.

Published
2019

69. Championing Dementia Education: Adapting an Effective Scottish Dementia Education Program for Canadian Acute Health Care Providers

Author

Peacock, Shelley, Bayly, Melanie, Fletcher-Hildebrand, Shaneice, Gibson, Kirstian, MacRae, Rhoda, Jack-Waugh, Anna, Haase, Kristen, Bally, Jill, Duggleby, Wendy, Hall, Steven, Holtslander, Lorraine, McAiney, Carrie, Michael, Joanne, Morgan, Debra, O’Connell, Megan, Ploeg, Jenny, Rohatinsky, Noelle, Thompson, Genevieve, and Vedel, Isabelle

Published
2023

71. Experiences of advanced dementia care in seven European countries: implications for educating the workforce

Author

Lillo-Crespo M, Riquelme J, Macrae R, De Abreu W, Hanson E, Holmerova I, Cabañero MJ, Ferrer R, and Tolson D

Subjects
caregivers, case study, quality improvement, Alzheimer disease, Dementia
Abstract

BACKGROUND: There is a paucity of robust research concerning the care experiences of peoplewith advanced dementia within Europe. It is essential to understand these experiences if weare to address care inequalities and create impactful dementia policies to improve servicesthat support individuals and enable family caring. OBJECTIVES: To identify the strengths and weaknesses in daily life perceived by people with dementia and family caring across Europe by exemplifying experiences and the range of typical care settings for advanced dementia care in seven partner countries. METHODS: Twenty two in-depth qualitative case studies were completed in seven European countries across a range of care settings considered typical within that country. Narrative accounts of care illuminated a unique set of experiences and highlighted what was working well (strengths or positive aspects) and not so well (weaknesses or negative aspects) for people with advanced dementia and family caring. A constant comparative method of analysis through thematic synthesis was used to identify the common themes. RESULTS: Eight key themes were identified; Early diagnosis, good coordination between service providers, future planning, support and education for carers, enabling the person with dementia to live thebest life possible and education on advanced dementia for professional and family caregiverswere all significant and recurring issues considered important for care experiences to bepositive. CONCLUSION: People with advanced dementia may have limited opportunities for self-realization and become increasingly reliant on the support of others to maximize their health and well-being. Careful attention must be given to their psychosocial well-being, living environment and family caring to enable them to live the best life possible. Building on what the case studies tell us about what works well, we discuss the potential for integrating the findings into interprofesional learning solutions for the professional workforce across Europe to champion practice-based change.

Published
2018

72. Study of the $��p\to ��^0��p$ reaction with the A2 setup at MAMI

Author

Sokhoyan, V., Prakhov, S., Fix, A., Abt, S., Achenbach, P., Adlarson, P., Afzal, F., Aguar-Bartolom��, P., Ahmed, Z., Ahrens, J., Annand, J. R. M., Arends, H. J., Bantawa, K., Bashkanov, M., Beck, R., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cherepnya, S., Cividini, F., Collicott, C., Costanza, S., Denig, A., Dieterle, M., Downie, E. J., Drexler, P., Bondy, M. I. Ferretti, Fil'kov, L. V., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gorodnov, I., Gradl, W., G��nther, M., Gurevich, G. M., Hamill, C. B., Heijkenskj��ld, L., Hornidge, D., Huber, G. M., Jude, T. C., K��ser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A., Linturi, J., Lisin, V., Livingston, K., Lutterer, S., MacGregor, I. J. D., Macrae, R., Manley, D. M., Martel, P. P., McGeorge, J. C., McNicoll, E. F., Middleton, D. G., Miskimen, R., Mornacchi, E., Mullen, C., Mushkarenkov, A., Neganov, A., Neiser, A., Nikolaev, A., Oberle, M., Ostrick, M., Ott, P., Otte, P. B., Paudyal, D., Pedroni, P., Polonski, A., Rajabi, A., Robinson, J., Ron, G., Rosner, G., Rostomyan, T., Sarty, A., Sfienti, C., Sikora, M. H., Spieker, K., Steffen, O., Strakovsky, I. I., Strandberg, B., Strub, Th., Supek, I., Thiel, A., Thiel, M., Thomas, A., Unverzagt, M., Usov, Yu. A., Wagner, S., Walford, N. K., Watts, D. P., Werthm��ller, D., Wettig, J., Witthauer, L., Wolfes, M., and Zana, L. A.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The data available from the A2 Collaboration at MAMI were analyzed to select the $��p\to ��^0��p$ reaction on an event-by-event basis, which allows for partial-wave analyses of three-body final states to obtain more reliable results, compared to fits to measured distributions. These data provide the world's best statistical accuracy in the energy range from threshold to $E_��=1.45$ GeV, allowing a finer energy binning in the measurement of all observables needed for understanding the reaction dynamics. The results obtained for the measured observables are compared to existing models, and the impact from the new data is checked by the fit with the revised Mainz model., 15 pages, 18 figures

Published
2018
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76. Canadian Consensus: Oligoprogressive, Pseudoprogressive, and Oligometastatic Non-Small-Cell Lung Cancer

Author

Laurie, S.A., primary, Banerji, S., additional, Blais, N., additional, Brule, S., additional, Cheema, P.K., additional, Cheung, P., additional, Daaboul, N., additional, Hao, D., additional, Hirsh, V., additional, Juergens, R., additional, Laskin, J., additional, Leighl, N., additional, MacRae, R., additional, Nicholas, G., additional, Roberge, D., additional, Rothenstein, J., additional, Stewart, D.J., additional, and Tsao, M.S., additional

Published
2019
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97. Study of η and η′ Photoproduction at MAMI

Author

Kashevarov, V. L., Ott, P., Prakhov, S., Adlarson, P., Afzal, F., Ahmed, Z., Akondi, C. S., Annand, J. R.M., Arends, H. J., Beck, R., Braghieri, A., Briscoe, W. J., Cividini, F., Codling, R., Collicott, C., Costanza, S., Denig, A., Downie, E. J., Dieterle, M., Ferretti Bondy, M. I., Fil'Kov, L. V., Fix, A., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Gurevich, G., Hamilton, D. J., Hornidge, D., Howdle, D., Huber, G. M., Käser, A., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Linturi, J., Lisin, V., Livingston, K., Macgregor, I. J.D., Macrae, R., Mancell, J., Manley, D. M., Martel, P. P., McGeorge, J. C., McNicol, E., Watts, D. P., and Werthmüller, Dominik

Abstract

The reactions γp→ηp and γp→η′p are measured from their thresholds up to the center-of-mass energy W=1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for η photoproduction at the energies in the vicinity of the η′ threshold, W=1896 MeV (Eγ=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η′ total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2- state to both ηp and η′p. Including the new high-accuracy results in the ηMAID fit to available η and η′ photoproduction data allows the determination of the N(1895)1/2- properties.

Published
2017

98. Measurement of the ω→π0e+e- and η→e+e-γ Dalitz decays with the A2 setup at the Mainz Microtron

Author

Adlarson, P., Afzal, F., Aguar-Bartolomé, P., Ahmed, Z., Annand, J. R.M., Arends, H. J., Bantawa, K., Beck, R., Berghäuser, H., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cherepnya, S., Cividini, F., Collicott, C., Costanza, S., Danilkin, I. V., Denig, A., Dieterle, M., Downie, E. J., Drexler, P., Ferretti Bondy, M. I., Fil'Kov, L. V., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Gurevich, G. M., Hamilton, D. J., Hornidge, D., Huber, G. M., Jude, T. C., Käser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A., Linturi, J., Lisin, V., Livingston, K., Macgregor, I. J.D., Macrae, R., Manley, D. M., Watts, D. P., and Werthmüller, Dominik

Abstract

The Dalitz decays η→e+e-γ and ω→π0e+e- have been measured in the γp→ηp and γp→ωp reactions, respectively, with the A2 tagged-photon facility at the Mainz Microtron. The value obtained for the slope parameter of the electromagnetic transition form factor of η, Λη-2=(1.97±0.11tot)GeV-2, is in good agreement with previous measurements of the η→e+e-γ and η→μ+μ-γ decays. The uncertainty obtained in the value of Λη-2 is lower than in previous results based on the η→e+e-γ decay. The value obtained for the ω slope parameter, Λωπ0-2=(1.99±0.21tot)GeV-2, is somewhat lower than previous measurements based on ω→π0μ+μ-, but the results for the ω transition form factor are in better agreement with theoretical calculations, compared to earlier experiments.

Published
2017

99. Measurement of the π0→e+e−γ Dalitz decay at the Mainz Microtron

Author

Adlarson, P., Afzal, F., Aguar-Bartolomé, P., Ahmed, Z., Akondi, C.S., Annand, J.R.M., Arends, H. J., Bantawa, K., Beck, R., Berghäuser, H., Biroth, M., Borisov, N.S., Braghieri, A., Briscoe, W.J., Cherepnya, S., Cividini, F., Collicott, C., Costanza, S., Denig, A., Dieterle, M., Downie, E.J., Drexler, P., Ferretti Bondy, M.I., Fil'kov, L.V., Gardner, S., Garni, S., Glazier, D.I., Glowa, D., Gradl, W., Gurevich, G.M., Hamilton, D.J., Hornidge, D., Huber, G.M., Jude, T.C., Käser, A., Kashevarov, V.L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Kulikov, V.V., Lazarev, A., Linturi, J., Lisin, V., Livingston, K., MacGregor, I.J.D., Macrae, R., Manley, D.M., Martel, P.P., Martemianov, M., McGeorge, J.C., McNicoll, E.F., Metag, V., Middleton, D.G., Miskimen, R., Mornacchi, E., Mullen, C., Mushkarenkov, A., Neganov, A., Neiser, A., Nikolaev, A., Oberle, M., Ostrick, M., Ott, P., Otte, P.B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S., Rajabi, A., Robinson, J., Ron, G., Rosner, G., Rostomyan, T., Sfienti, C., Sikora, M.H., Sokhoyan, V., Spieker, K., Steffen, O., Strakovsky, I.I., Strandberg, B., Strub, Th., Supek, I., Thiel, A., Thiel, M., Thomas, A., Unverzagt, M., Usov, Yu.A., Wagner, S., Walford, N., Watts, D.P., Werthmüller, D., Wettig, J., Witthauer, L., Wolfes, M., and Zana, L.A.

Subjects
QC
Abstract

The Dalitz decay π0 → e+e−γ has been measured in the γp → π0p reaction with the A2 tagged-photon\ud facility at the Mainz Microtron, MAMI. The value obtained for the slope parameter of the π0 electromagnetic\ud transition form factor, aπ = 0.030 ± 0.010tot, is in agreement with existing measurements of this decay and with\ud recent theoretical calculations. The uncertainty obtained in the value of aπ is lower than in previous results based\ud on the π0 → e+e−γ decay.

Published
2017

100. Measurement of the π0→e+e-γ Dalitz decay at the Mainz Microtron

Author

Adlarson, P., Afzal, F., Aguar-Bartolomé, P., Ahmed, Z., Akondi, C. S., Annand, J. R.M., Arends, H. J., Bantawa, K., Beck, R., Berghäuser, H., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cherepnya, S., Cividini, F., Collicott, C., Costanza, S., Denig, A., Dieterle, M., Downie, E. J., Drexler, P., Ferretti Bondy, M. I., Fil'Kov, L. V., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Gurevich, G. M., Hamilton, D. J., Hornidge, D., Huber, G. M., Jude, T. C., Käser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Kulikov, V. V., Lazarev, A., Linturi, J., Lisin, V., Livingston, K., Macgregor, I. J.D., Macrae, R., Watts, D. P., and Werthmüller, Dominik

Abstract

The Dalitz decay π0→e+e-γ has been measured in the γp→π0p reaction with the A2 tagged-photon facility at the Mainz Microtron, MAMI. The value obtained for the slope parameter of the π0 electromagnetic transition form factor, aπ=0.030±0.010tot, is in agreement with existing measurements of this decay and with recent theoretical calculations. The uncertainty obtained in the value of aπ is lower than in previous results based on the π0→e+e-γ decay.

Published
2017

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