Polarized <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>Λ</mi></mrow><mrow><mi>b</mi></mrow></msub></mrow><mo>→</mo><mrow><msub><mrow><mi>X</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow><mi>τ</mi><mi>ν</mi></math></span> in the standard model and two-Higgs-doublet model

Chao-Shang Huang; Hua-Gang Yan

doi:10.1103/PhysRevD.56.5981

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Polarized $Λ_{b} \to X_{c} τ ν$ in the standard model and two-Higgs-doublet model

Chao-Shang Huang

Hua-Gang Yan

Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China
International Centre for Theoretical Physics, P.O. Box 586, 341000 Trieste, Italy

Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China

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Phys. Rev. D 56, 5981 – Published 1 November, 1997

DOI: https://doi.org/10.1103/PhysRevD.56.5981

Abstract

The inclusive rate and $τ$ spectrum for a polarized $Λ_{b}$ baryon to decay to charm hadronic final states and leptons $τ ν$ in the SM and a two-Higgs-doublet model are computed. The $O (α_{s})$ QCD corrections to the $τ$ spectrum in the two-Higgs-doublet model are also given.

References (33)

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[c1] J. Chay, H. Georgi, and B. Grinstein, Phys. Lett. B 247, 399 (1990).

[c2] I. I. Bigi, M. Shifman, N. G. Uraltsev, and A. Vainshtein, Phys. Rev. Lett. 71, 496 (1993).

[c3] A. V. Manohar and M. B. Wise, Phys. Rev. D 49, 1310 (1994).

[c4] A. F. Falk, Z. Ligeti, M. Neubert, and Y. Nir, Phys. Lett. B 326, 145 (1994).

[c5] S. Balk, J. G. Körner, D. Pirjol, and K. Schilcher, Z. Phys. C 64, 37 (1994).

[c6] B. Blok, L. Koyrakh, M. Shifman, and A. I. Vainshtein, Phys. Rev. D 49, 3356 (1994).

[c7] Y. Grossman and Z. Ligeti, Phys. Lett. B 332, 373 (1994).

[c8] Y. Grossman, H. E. Haber, and Y. Nir, Phys. Lett. B 357, 630 (1995).

[c9] M. Neubert, hep-ph/9702375, and references therein.

[c10] J. H. Kühn and P. M. Zerwas, in Heavy Flavours, edited by A. J. Buras and M. Lindner (World Scientific, Singapore, 1992), p. 434.

[c11] J. H. Kühn et al., DESY Orange Report No. 92-123A, 1992, Vol. I, p. 255, in Physics and Experiments with Linear $e^{+} e^{-}$ Colliders, Proceedings of the Workshop, Waikoloa, Hawaii, 1993, edited by F. A. Harris et al. (World Scientific, Singapore, 1993), p. 72.

[c12] F. E. Close, J. G. Körner, R. J. N. Phillips, and D. J. Summers, J. Phys. G 18, 1716 (1992).

[c13] G. Köpp, L. M. Sehgal, and P. M. Zerwas, Nucl. Phys. B123, 77 (1977).

[c14] B. Mele and G. Altarelli, Phys. Lett. B 299, 345 (1993).

[c15] M. Gremm, G. Köpp, and L. M. Sehgal, Phys. Rev. D52, 1588 (1995).

[c16] M. Gremm, G. Köpp, F. Krüger, and L. M. Sehgal, in Proceedings of the EPS-HEP Conference, Brussels, 1995, hep-ph/9510273.

[c17] N. Isgur and M. Wise, Phys. Lett. B 232, 113 (1989); Phys. Lett. B 237, 527 (1990); E. Eichten and B. Hill, 234, 511 (1990); H. Georgi, 240, 44 (1990); M. Neubert, Phys. Rep. 245, 259 (1994), and references therein.

[c18] M. Jeżabek, in Proceedings of the XXVII International Conference on High Energy Physics, Glasgow, Scotland, 1994, edited by P. J. Bussey and I. G. Knowles (IOP, Bristol, 1995), and references therein.

[c19] M. Jeżabek and L. Motyka, hep-ph/9701358.

[c20] L. J. Hall and M. B. Wise, Nucl. Phys. B187, 397 (1981); X.-G. He, T. D. Nguyen, and R. R. Volkas, Phys. Rev. D 38, 814 (1988).

[c21] W. Skiba and J. Kalinowski, Nucl. Phys. B404, 3 (1983).

[c22] R. M. Barnett, G. Senjanovic, and D. Wyler, Phys. Rev. D 30, 1529 (1984).

[c23] J. F. Gunion, H. E. Haber, G. Kane, and S. Dawson, The Higgs Hunter’s Guide (Addison-Wesley, Reading, MA, 1990).

[c24] A. Czarnecki and S. Davidson, Phys. Rev. D 48, 4183 (1993).

[c25] J. Kalinowski, Phys. Lett. B 245, 201 (1990).

[c26] A. K. Grant, Phys. Rev. D 51, 207 (1995).

[c27] A. F. Falk and M. Neubert, Phys. Rev. D 47, 2982 (1993).

[c28] M. Gremm, F. Krüger, and L. M. Sehgal, Phys. Lett. B 355, 579 (1995).

[c29] J. G. Körner and D. Pirjol, Phys. Lett. B 334, 399 (1994).

[c30] H. Y. Jin, C. S. Huang, and Y. B. Dai, Z. Phys. C 56, 702 (1992).

[c31] A. F. Falk and M. Neubert, Phys. Rev. D 47, 2965 (1993); 47, 2982 (1993).

[c32] C. S. Huang, Commun. Theor. Phys. 24, 353 (1995).

[c33] Particle Data Group, R. M. Barnett et al., Phys. Rev. D 54, 1 (1996).

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Polarized $Λ_{b} \to X_{c} τ ν$ in the standard model and two-Higgs-doublet model

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Polarized Λb→Xcτν in the standard model and two-Higgs-doublet model

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References (33)

Polarized $Λ_{b} \to X_{c} τ ν$ in the standard model and two-Higgs-doublet model