We investigate the possibility of probing R-parity violating interactions in forward-backward asymmetries, and conclude that the Tevatron collider is the best place to measure new interactions involving the first generation of quarks. With additional down type squark ~dk contributions, the charge asymmetry in e+e— events around Z-pole mass region at the Tevatron will be sensitive to R-parity violating couplings λ’11k, which was inaccessible to the LEP Qfbhad inclusive measurement. Assuming no apparent deviation from SM prediction is observed, λ’11k< 0.19 at 95% C.L. with squark mass M~dk=100 GeV can be derived.
Abstract：We investigate the possibility of probing R-parity violating interactions in forward-backward asymmetries, and conclude that the Tevatron collider is the best place to measure new interactions involving the first generation of quarks. With additional down type squark ~dk contributions, the charge asymmetry in e+e— events around Z-pole mass region at the Tevatron will be sensitive to R-parity violating couplings λ’11k, which was inaccessible to the LEP Qfbhad inclusive measurement. Assuming no apparent deviation from SM prediction is observed, λ’11k< 0.19 at 95% C.L. with squark mass M~dk=100 GeV can be derived.
[1] Amsler C et al (Particle Data Group) 2008 Phys. Lett. B 667 1 [2] Abbiendi G et al (LEP Collaborations ALEPH, DELPHI, L3 and OPAL, SLD Collaboration, LEP Electroweak Working Group, SLD Electroweak and Heavy Flavor Groups) 2006 Phys. Rep. 427 257 [3] Rosner J L 1996 Phys. Rev. D 54 1078 [4] Barbier R et al 2005 Phys. Rept. 420 1 [5] Sun Y et al 2005 Commun. Theor. Phys. 44 107 [6] Abulencia A et al (CDF Collaboration) 2006 Phys. Rev. Lett. 96 211802 [7] Abazov V et al (D\O Collaboration) 2008 Phys. Rev. Lett. 100 241803 [8] Acosta D et al (CDF Collaboration) 2005 Phys. Rev. D 71 052002 [9] Abazov V et al (D\O Collaboration) 2008 Phys. Rev. Lett. 101 191801 [10] Collins J C and Soper D E 1977 Phys. Rev. D 16 2219 [11] Boos E et al (CompHep Collaboration) 2004 Nucl. Instrum. Methods A 534 250 [12] Pumplin J et al 2002 J. High Energy Phys. 07 012 [13] Hamberg R et al 1991 Nucl. Phys. B 359 343 [Erratum 2002 ibid B 644 403]
2010, Vol. 27 
