# Sfermion precision measurements at a linear collider

## Abstract

At future e{sup +}e{sup -} linear colliders, the event rates and clean signals of scalar fermion production--in particular for the scalar leptons--allow very precise measurements of their masses and couplings and the determination of their quantum numbers. Various methods are proposed for extracting these parameters from the data at the sfermion thresholds and in the continuum. At the same time, NLO radiative corrections and non-zero width effects have been calculated in order to match the experimental accuracy. The substantial mixing expected for the third generation sfermions opens up additional opportunities. Techniques are presented for determining potential CP-violating phases and for extracting tan {beta} from the stau sector, in particular at high values. The consequences of possible large mass differences in the stop and sbottom system are explored in dedicated analyses.

- Authors:

- Publication Date:

- Research Org.:
- Fermi National Accelerator Lab., Batavia, IL (US)

- Sponsoring Org.:
- USDOE Office of Energy Research (ER) (US)

- OSTI Identifier:
- 815213

- Report Number(s):
- FERMILAB-Conf-02/384

TRN: US0304538

- DOE Contract Number:
- AC02-76CH03000

- Resource Type:
- Conference

- Resource Relation:
- Conference: International Workshop on Linear Colliders (LCWS 2002), Jeju Island (KR), 08/26/2002--08/30/2002; Other Information: PBD: 25 Sep 2003

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 43 PARTICLE ACCELERATORS; ACCURACY; FERMIONS; LINEAR COLLIDERS; MASS DIFFERENCE; QUANTUM NUMBERS; RADIATIVE CORRECTIONS; SCALARS

### Citation Formats

```
A. Freitas et al.
```*Sfermion precision measurements at a linear collider*. United States: N. p., 2003.
Web.

```
A. Freitas et al.
```*Sfermion precision measurements at a linear collider*. United States.

```
A. Freitas et al. Thu .
"Sfermion precision measurements at a linear collider". United States. https://www.osti.gov/servlets/purl/815213.
```

```
@article{osti_815213,
```

title = {Sfermion precision measurements at a linear collider},

author = {A. Freitas et al.},

abstractNote = {At future e{sup +}e{sup -} linear colliders, the event rates and clean signals of scalar fermion production--in particular for the scalar leptons--allow very precise measurements of their masses and couplings and the determination of their quantum numbers. Various methods are proposed for extracting these parameters from the data at the sfermion thresholds and in the continuum. At the same time, NLO radiative corrections and non-zero width effects have been calculated in order to match the experimental accuracy. The substantial mixing expected for the third generation sfermions opens up additional opportunities. Techniques are presented for determining potential CP-violating phases and for extracting tan {beta} from the stau sector, in particular at high values. The consequences of possible large mass differences in the stop and sbottom system are explored in dedicated analyses.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {2003},

month = {9}

}