Differential cross section and recoil polarization measurements for the gamma p -> K(+) Lambda reaction using CLAS at Jefferson Lab

McCracken, M. E.; Bellis, M.; Meyer, C. A.; Williams, M.; Adhikari, K. P.; Anghinolfi, M.; Ball, J.; Battaglieri, M.; Berman, B. L.; Biselli, A. S.; Branford, D.; Briscoe, W. J.; Brooks, W. K.; Burkert, V. D.; Careccia, S. L.; Carman, D. S.; Cole, P. L.; Collins, P.; Crede, V.; D’Angelo, A.; Daniel, A.; Dashyan, N.; De Vita, R.; De Sanctis, E.; Deur, A.; Dey, B.; Dhamija, S.; Dickson, R.; Djalali, C.; Doughty, D.; Dugger, M.; Dupre, R.; El Alaoui, A.; Eugenio, P.; Fegan, S.; Fradi, A.; Gabrielyan, M. Y.; Giovanetti, K. L.; Girod, F. X.; Goetz, J. T.; Gohn, W.; Gothe, R. W.; Griffioen, K. A.; Guidal, M.; Hafidi, K.; Hakobyanm, H.; Hanretty, C.; Hassall, N.; Hicks, K.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; H. S., Jo; Keller, D.; Khandaker, M.; Khetarpal, P.; Kim, W.; Klein, A.; Klein, F. J.; Kubarovsky, V.; Kuleshov, S. V.; Kuznetsov, V.; Livingston, K.; Mayer, M.; McAndrew, J.; McKinnon, B.; Mestayer, M. D.; Mineeva, T.; Mirazita, M.; Mokeev, V.; Moreno, B.; Moriya, K.; Morrison, B.; Moutarde, H.; Munevar, E.; Nadel Turonski, P.; Niccolai, S.; Niculescu, G.; Niculescu, I.; Osipenko, M.; Ostrovidov, A. I.; Park, K.; Park, S.; Pasyuk, E.; Anefalos Pereira, S.; Perrin, Y.; Pisano, S.; Pogorelko, O.; Pozdniakov, S.; Price, J. W.; Procureur, S.; Prok, Y.; Protopopescu, D.; Quinn, B.; Raue, B. A.; Ricco, Giovanni; Ripani, M.; Ritchie, B. G.; Rosner, G.; Rossi, P.; Sabatié, F.; Saini, M. S.; Salamanca, J.; Schott, D.; Schumacher, R. A.; Seder, E.; Seraydaryan, H.; Sharabian, Y. G.; Sober, D. I.; Sokhan, D.; Stepanyan, S. S.; Stoler, P.; Strauch, S.; Taiuti, Mauro Gino; Tedeschi, D. J.; Tkachenko, S.; Ungaro, M.; Vernarsky, B.; Vineyard, M. F.; Watts, D.; Voutier, E.; Weinstein, L. B.; Weygand, D. P.; Wood, M. H.; Zana, L.

doi:10.1103/PhysRevC.81.025201

We present measurements of the differential cross section and Lambda recoil polarization for the gamma p -> K(+) Lambda reaction made using the CLAS detector at Jefferson Lab. These measurements cover the center-of-mass energy range from 1.62 to 2.84 GeV and a wide range of center-of-mass K(+) production angles. Independent analyses were performed using the K(+) p pi(-) and K(+) p (missing pi(-)) final-state topologies; results from these analyses were found to exhibit good agreement. These differential-cross-section measurements show excellent agreement with previous CLAS and LEPS results and offer increased precision and a 300-MeV increase in energy coverage. The recoil polarization data agree well with previous results and offer a large increase in precision and a 500-MeV extension in energy range. The increased center-of-mass energy range that these data represent will allow for independent study of nonresonant K(+) Lambda photoproduction mechanisms at all production angles.

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Titolo:	Differential cross section and recoil polarization measurements for the gamma p -> K(+) Lambda reaction using CLAS at Jefferson Lab
Autori:	M. E. McCracken M. Bellis C. A. Meyer M. Williams K. P. Adhikari M. Anghinolfi J. Ball M. Battaglieri B. L. Berman A. S. Biselli D. Branford W. J. Briscoe W. K. Brooks V. D. Burkert S. L. Careccia D. S. Carman P. L. Cole P. Collins V. Crede A. D’Angelo A. Daniel N. Dashyan R. De Vita E. De Sanctis A. Deur B. Dey S. Dhamija R. Dickson C. Djalali D. Doughty M. Dugger R. Dupre A. El Alaoui P. Eugenio S. Fegan A. Fradi M. Y. Gabrielyan K. L. Giovanetti F. X. Girod J. T. Goetz W. Gohn R. W. Gothe K. A. Griffioen M. Guidal K. Hafidi H. Hakobyanm C. Hanretty N. Hassall K. Hicks M. Holtrop Y. Ilieva D. G. Ireland H. S. Jo D. Keller M. Khandaker P. Khetarpal W. Kim A. Klein F. J. Klein V. Kubarovsky S. V. Kuleshov V. Kuznetsov K. Livingston M. Mayer J. McAndrew B. McKinnon M. D. Mestayer T. Mineeva M. Mirazita V. Mokeev B. Moreno K. Moriya B. Morrison H. Moutarde E. Munevar P. Nadel Turonski S. Niccolai G. Niculescu I. Niculescu M. Osipenko A. I. Ostrovidov K. Park S. Park E. Pasyuk S. Anefalos Pereira Y. Perrin S. Pisano O. Pogorelko S. Pozdniakov J. W. Price S. Procureur Y. Prok D. Protopopescu B. Quinn B. A. Raue RICCO, GIOVANNI M. Ripani B. G. Ritchie G. Rosner P. Rossi F. Sabatié M. S. Saini J. Salamanca D. Schott R. A. Schumacher E. Seder H. Seraydaryan Y. G. Sharabian D. I. Sober D. Sokhan S. S. Stepanyan P. Stoler S. Strauch TAIUTI, MAURO GINO D. J. Tedeschi S. Tkachenko M. Ungaro B. Vernarsky M. F. Vineyard D. Watts E. Voutier L. B. Weinstein D. P. Weygand M. H. Wood L. Zana mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2010
Rivista:	PHYSICAL REVIEW. C, NUCLEAR PHYSICS
Abstract:	We present measurements of the differential cross section and Lambda recoil polarization for the gamma p -> K(+) Lambda reaction made using the CLAS detector at Jefferson Lab. These measurements cover the center-of-mass energy range from 1.62 to 2.84 GeV and a wide range of center-of-mass K(+) production angles. Independent analyses were performed using the K(+) p pi(-) and K(+) p (missing pi(-)) final-state topologies; results from these analyses were found to exhibit good agreement. These differential-cross-section measurements show excellent agreement with previous CLAS and LEPS results and offer increased precision and a 300-MeV increase in energy coverage. The recoil polarization data agree well with previous results and offer a large increase in precision and a 500-MeV extension in energy range. The increased center-of-mass energy range that these data represent will allow for independent study of nonresonant K(+) Lambda photoproduction mechanisms at all production angles.
Handle:	http://hdl.handle.net/11567/302056
Appare nelle tipologie:	01.01 - Articolo su rivista

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