Tensor polarization of the ϕ meson photoproduced at high t

K. McCormick; Angela Biselli

doi:10.1103/PhysRevC.69.032203

Tensor polarization of the ϕ meson photoproduced at high t

K. McCormick, Angela Biselli

Fairfield University

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Abstract

<p> As part of a measurement [E. Anciant et al., Phys. Rev. Lett. 85, 4682 (2000)] of the cross section of ϕ meson photoproduction to high momentum transfer, we measured the polar angular decay distribution of the outgoing K+ in the channel ϕ→K+K− in the ϕ center-of-mass frame (the helicity frame). We find that s-channel helicity conservation (SCHC) holds in the kinematical range where t-channel exchange dominates (up to −t&sim;2.5GeV2 for Eγ=3.6GeV). Above this momentum, u-channel production of a ϕ meson dominates and induces a violation of SCHC. The deduced value of the ϕNN coupling constant lies in the upper range of previously reported values.</p>

Original language	American English
Journal	Physical Review C
Volume	69
DOIs	https://doi.org/10.1103/PhysRevC.69.032203
State	Published - Jan 1 2004

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Physical Sciences and Mathematics
Physics

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Tensor polarization of the meson photoproduced at high tFinal published version, 219 KBLicense: CC BY

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title = "Tensor polarization of the ϕ meson photoproduced at high t",

abstract = " As part of a measurement [E. Anciant et al., Phys. Rev. Lett. 85, 4682 (2000)] of the cross section of \ϕ meson photoproduction to high momentum transfer, we measured the polar angular decay distribution of the outgoing K+ in the channel \ϕ\→K+K\− in the \ϕ center-of-mass frame (the helicity frame). We find that s-channel helicity conservation (SCHC) holds in the kinematical range where t-channel exchange dominates (up to \−t\&sim;2.5GeV2 for E\γ=3.6GeV). Above this momentum, u-channel production of a \ϕ meson dominates and induces a violation of SCHC. The deduced value of the \ϕNN coupling constant lies in the upper range of previously reported values.",

author = "K. McCormick and Angela Biselli",

year = "2004",

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doi = "10.1103/PhysRevC.69.032203",

language = "American English",

volume = "69",

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T1 - Tensor polarization of the ϕ meson photoproduced at high t

AU - McCormick, K.

AU - Biselli, Angela

PY - 2004/1/1

Y1 - 2004/1/1

N2 - As part of a measurement [E. Anciant et al., Phys. Rev. Lett. 85, 4682 (2000)] of the cross section of ϕ meson photoproduction to high momentum transfer, we measured the polar angular decay distribution of the outgoing K+ in the channel ϕ→K+K− in the ϕ center-of-mass frame (the helicity frame). We find that s-channel helicity conservation (SCHC) holds in the kinematical range where t-channel exchange dominates (up to −t&sim;2.5GeV2 for Eγ=3.6GeV). Above this momentum, u-channel production of a ϕ meson dominates and induces a violation of SCHC. The deduced value of the ϕNN coupling constant lies in the upper range of previously reported values.

AB - As part of a measurement [E. Anciant et al., Phys. Rev. Lett. 85, 4682 (2000)] of the cross section of ϕ meson photoproduction to high momentum transfer, we measured the polar angular decay distribution of the outgoing K+ in the channel ϕ→K+K− in the ϕ center-of-mass frame (the helicity frame). We find that s-channel helicity conservation (SCHC) holds in the kinematical range where t-channel exchange dominates (up to −t&sim;2.5GeV2 for Eγ=3.6GeV). Above this momentum, u-channel production of a ϕ meson dominates and induces a violation of SCHC. The deduced value of the ϕNN coupling constant lies in the upper range of previously reported values.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/92

U2 - 10.1103/PhysRevC.69.032203

DO - 10.1103/PhysRevC.69.032203

M3 - Article

VL - 69

JO - Physical Review C

JF - Physical Review C

ER -

Tensor polarization of the ϕ meson photoproduced at high t

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