Erratum: Determination of |Vub| from measurements of the electron and neutrino momenta in inclusive semileptonic B decays (Physical Review Letters (2005) 95 (111801))

About: This article is published in Physical Review Letters.The article was published on 2006-01-01 and is currently open access. It has received 5 citations till now. The article focuses on the topics: Semileptonic decay & Neutrino.

Summary

Summary

• Erratum: Determination of jVubj from Measurements of the Electron and Neutrino Momenta in Inclusive Semileptonic B decays [Phys. Rev. Lett. 95, 111801 (2005)].
• Due to a coding error, the previous Letter [1] erroneously used the variable smaxh in the 4S rest frame instead of ~smaxh in the B rest frame to define the region of interest for the determination of the unfolded partial branching fraction B ~Ecut; ~smaxh;cut .
• This unfolded partial branching fraction corrects for detector resolution and acceptance and corresponds to the kinematic region where the electron energy ~Ee in the B rest frame exceeds ~Ecut, and the quantity ~smaxh m2B q2 2mB ~Ee q2=4 ~Ee , where q2 is the square of the four-momentum transfer in the decay, is smaller than ~smaxh;cut.
• The error affected only the calculation of the signal efficiencies; none of the yields quoted in the Letter are changed.
• The signal acceptance and efficiencies given in Table I of Ref. [1] are incorrect, as are the values for B therein.
• The corrected values for the efficiencies with ~Ecut 2:0 GeV and ~smaxh;cut 3:5 GeV2 are given in Table I.
• Using the updated partial branching fraction for ~Ecut 2:0 GeV and the same parameters used in Ref. [1], the authors find jVubj 4:41 0:30 0:65 0:47 0:28 10 3, where the errors represent experimental uncertainties, heavy quark parameter uncertainties, and theoretical uncertainties, respectively.

Figures

TABLE I. Updated efficiencies, quoted in units of 10 4, and the acceptance fraction.

Full text

Erratum: Determination of jV
ub
j from Measurements of the Electron and Neutrino Momenta
in Inclusive Semileptonic B decays
[Phys. Rev. Lett. 95, 111801 (2005)]
B. Aubert, R. Barate, D. Boutigny, F. Couderc, Y. Karyotakis, J. P. Lees, V. Poireau, V. Tisserand, A. Zghiche, E. Grauges,
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A. Satpathy, R. F. Schwitters, J. M. Izen, I. Kitayama, X. C. Lou, S. Ye, F. Bianchi, M. Bona, F. Gallo, D. Gamba,
M. Bomben, L. Bosisio, C. Cartaro, F. Cossutti, G. Della Ricca, S. Dittongo, S. Grancagnolo, L. Lanceri, L. Vitale,
F. Martinez-Vidal, R. S. Panvini, Sw. Banerjee, B. Bhuyan, C. M. Brown, D. Fortin, K. Hamano, R. Kowalewski,
J. M. Roney, R. J. Sobie, J. J. Back, P. F. Harrison, T. E. Latham, G. B. Mohanty, H. R. Band, X. Chen, B. Cheng, S. Dasu,
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A. Mihalyi, Y. Pan, R. Prepost, P. Tan, J. H. von Wimmersperg-Toeller, S. L. Wu, Z. Yu, and H. Neal
(B
ABAR Collaboration)
(Received 9 June 2006; published 5 July 2006)
DOI: 10.1103/PhysRevLett.97.019903 PACS numbers: 13.20.He, 12.15.Hh, 14.40.Nd, 99.10.Cd
Due to a coding error, the previous Letter [1] erroneously used the variable s
max
h
in the 4S rest frame instead of
~
s
max
h
in
the B rest frame to define the region of interest for the determination of the unfolded partial branching fraction
B
~
E
cut
;
~
s
max
h;cut
. This unfolded partial branching fraction corrects for detector resolution and acceptance and corresponds
to the kinematic region where the electron energy
~
E
e
in the B rest frame exceeds
~
E
cut
, and the quantity
~
s
max
h
 m
2
B

q
2
 2m
B

~
E
e
 q
2
=4
~
E
e
, where q
2
is the square of the four-momentum transfer in the decay, is smaller than
~
s
max
h;cut
. The
error affected only the calculation of the signal efficiencies; none of the yields quoted in the Letter are changed. The signal
acceptance and efficiencies given in Table I of Ref. [1] are incorrect, as are the values for B therein. The corrected values
for the efficiencies with
~
E
cut
 2:0 GeV and
~
s
max
h;cut
 3:5 GeV
2
are given in Table I. The resulting values for the partial
branching fractions are
B1:9; 3:55:29  0:44  0:7210
4
; (1)
B2:0; 3:54:41  0:42  0:4210
4
; (2)
B2:1; 3:53:68  0:43  0:3610
4
: (3)
It has been verified that the estimates of the systematic uncertainties given in Ref. [1] are unaffected by the coding error; the
fractional systematic uncertainties on B are unchanged.
TABLE I. Updated efficiencies, quoted in units of 10
4
, and the acceptance fraction.

sig

sig
f
u
256  32:7  0:20:174
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019903-2

Using the updated partial branching fraction for
~
E
cut
 2:0 GeV and the same parameters used in Ref. [1], we find
jV
ub
j4:41  0:30
0:65
0:47
 0:2810
3
, where the errors represent experimental uncertainties, heavy quark parameter
uncertainties, and theoretical uncertainties, respectively.
We would like to thank Frank Tackmann for alerting us to the error in the original efficiency calculation.
[1] B. Aubert et al. (BABAR Collaboration), Phys. Rev. Lett. 95, 111801 (2005).
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019903-3

Frequently asked questions

Q1. What have the authors contributed in "Erratum: determination of jvubj from measurements of the electron and neutrino momenta in inclusive semileptonic b decays" ?

In this paper, Chen et al. present a survey of the authors of this paper: A.B. Carmel, A.C. Hohenberger, E.M. Holden, A., C.C., E.B., A.A. Holden et al., M. A. Kadel, J. E. Knecht, T. T. Holden.