Ok, I get it now. Sorry, the parameters are somewhat confusing. This works:

    analysisValueControl = new FormControl({value: '', disabled: true}, {validators: [
        Validators.required, Validators.pattern(/^([+-]?[\d\.,]+)(\([+-]?[\d\.,]+\))?([eE][+-]?\d+)?$/i) ],
        updateOn: 'blur'});