W mass Error Analysis

Contributions (in MeV) of the EC measurement uncertainties to the EC W mass result and to the combined CC+EC result for Run 1b.

Source m_t fit
EC m_t fit
CC+EC
CC-EC Z mass stat. error 37 16
EC-EC Z mass stat. error 179 34
EC W stat. error 107 21
CC-EC Z width stat. error 47 14
EC-EC Z width stat. error 56 4
FDC radial scale 16 4
FDC-EC radial scale 23 6
ECEM offset 50 4
hadronic response 16 10
hadronic resolution 45 21
EC W background 21 4
PDF 35 15
p_t(W) 22 9
Width(W) 10 6
radiative corrections 4 1

We can compare the individual results obtained from the ECN and ECS data separately and obtain the good agreements:

M_W(ECN) - M_W(ECS) = 33 +/- 210 MeV (m_t fit)
M_W(ECN) - M_W(ECS) = -213 +/- 253 MeV (p_t(e) fit)
M_W(ECN) - M_W(ECS) = 15 +/- 319 MeV (p_t(nu) fit)

Source	m_t fit EC	m_t fit CC+EC
CC-EC Z mass stat. error	37	16
EC-EC Z mass stat. error	179	34
EC W stat. error	107	21
CC-EC Z width stat. error	47	14
EC-EC Z width stat. error	56	4
FDC radial scale	16	4
FDC-EC radial scale	23	6
ECEM offset	50	4
hadronic response	16	10
hadronic resolution	45	21
EC W background	21	4
PDF	35	15
p_t(W)	22	9
Width(W)	10	6
radiative corrections	4	1

W mass Error Analysis

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