CP violation in chargino decays in the MSSM

نویسندگان

  • Wei Min Yang
  • Dong Sheng Du
چکیده

In the minimal supersymmetric standard model (MSSM) with complex parameters, supersymmetric loop effects can lead to CP violation. We calculate the rate asymmetries of decays of charginos into the lightest neutralino and a W boson on the basis of the most important loop contributions in the third generation squark sectors. It turns out that the CP violating asymmetries can be a few per cent in typical regions of the parameter space of the MSSM. These processes would provide very promising channels for probing CP violation in the MSSM at future high-energy colliders. PACS numbers: 12.60.Jv, 13.90.+i, 14.80.Ly ∗Email address: [email protected]

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

CP sensitive observables in chargino production with transverse e ± beam polarization

We consider the process ee → χ̃+i χ̃−j at a linear collider with transverse e beam polarization. We investigate the influence of the CP phases on azimuthal asymmetries in ee → χ̃+i χ̃−j with subsequent two-body decays χ̃−j → ν̃ll− and χ̃−j → W−χ̃01. We show that triple product correlations involving the transverse e beam polarization vanish if at least one subsequent chargino decay is not observed. We ...

متن کامل

CP violation in the chargino/neutralino sector of the MSSM

The CP-violating effects in the neutralino sector of the MSSM can be observed in event-counting type experiments, i.e. without the need of exploiting variables sensitive to beam or neutralino polarization. On the other hand, such CP-odd effects in the chargino sector can be generated only at the loop level. We contrast the two sectors and present results of full one-loop analysis of the CP-odd ...

متن کامل

Can the Higgs Sector Trigger CP Violation in the MSSM?

We reanalyze the possibility of CP violation in the Higgs sector of the minimal supersymmetric standard model (MSSM). Contrary to the result of previous analysis, spontaneous CP violation can not occur by only chargino and neutralino radiative corrections since the vacuum does not stable. Top and stop radiative corrections are crucially needed. However even with this correction there is no expe...

متن کامل

Next–to–Leading Order QCD corrections to BB–mixing and ǫK within the MSSM

We present a calculation of the QCD correction factors η2B and η2K up to Next–to–Leading Order within the MSSM. We took into account the region of low tanβ for the Higgs– and chargino sector while neglecting the effect of gluinos and neutralinos. Key–words: Mixing; MSSM; CP-violation; CKM-matrix

متن کامل

CP-violating asymmetry in chargino decay into neutralino and W boson

In the MSSM with complex parameters, loop corrections to χ̃i → χ̃jW lead to a CP violating asymmetry ACP = (Γ(χ̃ + i → χ̃jW) − Γ(χ̃i → χ̃jW))/(Γ(χ̃i → χ̃jW )+Γ(χ̃i → χ̃jW)). We calculate this asymmetry at full one-loop level. We perform a detailed numerical analysis for χ̃1 → χ̃1W and χ̃2 → χ̃1W analyzing the dependence on the parameters and phases involved. Asymmetries of several percent are obtained. We al...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2002