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: | |
Data di pubblicazione: | 2010 |
Rivista: | |
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 |