<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>T</mi></math></span>-odd polarization observables in the photoproduction of charmed particles near threshold

Michail P. Rekalo; Egle Tomasi-Gustafsson

doi:10.1103/PhysRevD.65.014010

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$T$ -odd polarization observables in the photoproduction of charmed particles near threshold

Michail P. Rekalo^*

Egle Tomasi-Gustafsson

Middle East Technical University, Physics Department, Ankara 06531, Turkey

DAPNIA/SPhN, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France

^*Permanent address: National Science Center KFTI, 310108 Kharkov, Ukraine.

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Phys. Rev. D 65, 014010 – Published 11 December, 2001

DOI: https://doi.org/10.1103/PhysRevD.65.014010

Abstract

The imaginary part of the matrix element for associative charm particle photoproduction, $γ + N \to Λ_{c} + \bar{D},$ has a definite spin structure, near the reaction threshold, being characterized by a single parameter. This allows us to predict, in the framework of an effective Lagrangian approach, the energy and the angular dependence of T-odd polarization observables such as the analyzing power in the reaction $γ + \vec{p} \to Λ_{c} + \bar{D}$ and the polarization of the $Λ_{c}$ hyperon, produced in the collision of unpolarized particles. We find sizable values for these observables, which can be measured experimentally.

References (24)

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[c1] S. Okubo, Phys. Lett. 5, 165 (1963); G. Zweig, CERN Reports TH401 and TH412, 1964; J. Iizuka, K. Okada, and O. Shito, Suppl. Prog. Theor. Phys. 37, 38 (1966).

[c2] S.G. Matinyan and B. Muller, Phys. Rev. C 58, 2994 (1998).

[c3] K.L. Haglin, Phys. Rev. C 61, 031902 (2000).

[c4] Z. Lin and C.M. Ko, Phys. Rev. C 62, 034903 (2000).

[c5] Z. Lin, C.M. Ko, and B. Zhang, Phys. Rev. C 61, 024904 (2000).

[c6] G.F. Chew, M.L. Goldberger, F.E. Low, and Y. Nambu, Phys. Rev. 106, 1345 (1957).

[c7] M.P. Rekalo, Ukr. Phys. J. 22, 1602 (1977).

[c8] M.P. Rekalo and E. Tomasi-Gustafsson, Phys. Lett. B 500, 53 (2001).

[c9] N. Christ and T.D. Lee, Phys. Rev. 143, 1310 (1966).

[c10] A.M. Bincer, Phys. Rev. 118, 855 (1960).

[c11] H.W. Naus, J.H. Koch, and J.L. Friar, Phys. Rev. C 41, 2852 (1990).

[c12] J.W. Bos, S. Scherer, and J.H. Koch, Nucl. Phys. A547, 488 (1992).

[c13] A.L. Choudhury and V. Joshi, Phys. Rev. D 13, 3115 (1976).

[c14] A.L. Choudhury and V. Joshi, Phys. Rev. D 13, 3120 (1976).

[c15] D.B. Lichtenberg, Phys. Rev. D 15, 345 (1977).

[c16] S.N. Jena and D.P. Rath, Phys. Rev. D 34, 196 (1986).

[c17] S.K. Bose and L.P. Singh, Phys. Rev. D 22, 773 (1980).

[c18] Y. Oh, D.-P. Min, M. Rho, and N.N. Scoccola, Nucl. Phys. A534, 493 (1991).

[c19] M.J. Savage, Phys. Lett. B 326, 303 (1994).

[c20] M.C. Banuls, I. Scimemi, J. Bernabeu, V. Gimenez, and A. Pich, Phys. Rev. D 61, 074007 (2000).

[c21] D.W. Duke and J.F. Owens, Phys. Rev. Lett. 44, 1173 (1980).

[c22] S.J. Brodsky, E. Chudakov, P. Hoyer, and J.M. Laget, Phys. Lett. B 498, 23 (2001).

[c23] J. Berthot, P. Y. Bertin, V. Breton, G. Fournier, Z. Meziani, J. Mougey, and M. Potokar, The ELFE project: physics with a 15-GeV to 30-GeV high intensity continuous beam electron accelerator, proceedings, Workshop, Mainz, Germany, 1992, edited by by J. Arvieux and E. De Sanctis (Mainz University Institute Physics, Mainz, 1992), p. 309.

[c24] V.M. Samsonov, Nucl. Instrum. Methods Phys. Res. B 119, 271 (1996).

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$T$ -odd polarization observables in the photoproduction of charmed particles near threshold

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T-odd polarization observables in the photoproduction of charmed particles near threshold

Abstract

References (24)

$T$ -odd polarization observables in the photoproduction of charmed particles near threshold