First Measurement of Transferred Polarization in the Exclusive e⃗ p→e′K+Λ⃗Reaction

D. S. Carman; Angela Biselli

doi:10.1103/PhysRevLett.90.131804

First Measurement of Transferred Polarization in the Exclusive e⃗ p→e′K+Λ⃗Reaction

D. S. Carman, Angela Biselli

Fairfield University

Research output: Contribution to journal › Article › peer-review

Abstract

<p> The first measurements of the transferred polarization for the exclusive e⃗ p→e′K+Λ⃗ reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q2 from 0.3 to 1.5 &hairsp;&hairsp;(GeV/c)2, W from 1.6 to 2.15 GeV, and over the full K+ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the ss¯ quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed.</p>

Original language	American English
Journal	Physical Review Letters
Volume	90
DOIs	https://doi.org/10.1103/PhysRevLett.90.131804
State	Published - Jan 1 2003

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Physical Sciences and Mathematics
Physics

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title = "First Measurement of Transferred Polarization in the Exclusive e⃗ p→e′K+Λ⃗Reaction",

abstract = " The first measurements of the transferred polarization for the exclusive e⃗ p\→e\′K+\Λ⃗ reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q2 from 0.3 to 1.5\ \&hairsp;\&hairsp;(GeV/c)2, W from 1.6 to 2.15 GeV, and over the full K+ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the ss\¯ quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed.",

author = "Carman, \{D. S.\} and Angela Biselli",

year = "2003",

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doi = "10.1103/PhysRevLett.90.131804",

language = "American English",

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AU - Biselli, Angela

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Y1 - 2003/1/1

N2 - The first measurements of the transferred polarization for the exclusive e⃗ p→e′K+Λ⃗ reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q2 from 0.3 to 1.5 &hairsp;&hairsp;(GeV/c)2, W from 1.6 to 2.15 GeV, and over the full K+ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the ss¯ quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed.

AB - The first measurements of the transferred polarization for the exclusive e⃗ p→e′K+Λ⃗ reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q2 from 0.3 to 1.5 &hairsp;&hairsp;(GeV/c)2, W from 1.6 to 2.15 GeV, and over the full K+ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the ss¯ quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/100

U2 - 10.1103/PhysRevLett.90.131804

DO - 10.1103/PhysRevLett.90.131804

M3 - Article

VL - 90

JO - Physical Review Letters

JF - Physical Review Letters

ER -

First Measurement of Transferred Polarization in the Exclusive e⃗ p→e′K+Λ⃗Reaction

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