Precise Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">b</mml:mi></mml:math>-Quark Fragmentation Function in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">Z</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Boson Decays

Oh, S.; Schalk, T.; Schumm, B. A.; Schwiening, J.; Vv, Serbo; Shapiro, G.; Nb, Sinev; Snyder, J. A.; Staengle, H.; Stahl, A.; Stamer, P.; Steiner, H.; Su, D.; Suekane, F.; Sugiyama, A.; Swartz, M.; Fe, Taylor; Thom, J.; Usher, T.; Va’vra, J.; Verdier, R.; Dl, Wagner; Ap, Waite; Walston, S.; Wang, J; Weidemann, A. W.

doi:10.1103/physrevlett.84.4300

Cited by 64 publications

(58 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…within the experimental range 0.702 ± 0.008 recommended by the LEP Electroweak Working Group [35]. This value is consistent with a recent determination of x E b = 0.714 ± 0.009 from SLD [37]. The systematic error is also estimated from the Collins and Spiller fragmentation function [38] and Kartvelishvili fragmentation function [39].…”

Section: Systematic Errorssupporting

confidence: 75%

Measurement of $|{\rm V}_{\rm ub}|$ using $b$ hadron semileptonic decay

Abbiendi¹,

Ainsley²,

Åkesson³

et al. 2001

Eur. Phys. J. C

View full text Add to dashboard Cite

Measurement of |V ub | using b hadron semileptonic decayThe OPAL Collaboration AbstractThe magnitude of the CKM matrix element |V ub | is determined by measuring the inclusive charmless semileptonic branching fraction of beauty hadrons at OPAL based on b → X u ℓν event topology and kinematics. This analysis uses OPAL data collected between 1991 and 1995, which correspond to about four million hadronic Z decays. We measure Br(b → X u ℓν) to be (1.63 ± 0.53 +0.55 −0.62 ) × 10 −3 . The first uncertainty is the statistical error and the second is the systematic error. From this analysis, |V ub | is determined to be:The last error represents the theoretical uncertainties related to the extraction of |V ub | from Br(b → X u ℓν) using the Heavy Quark Expansion.

show abstract

Section: Systematic Errorssupporting

confidence: 75%

Measurement of $|{\rm V}_{\rm ub}|$ using $b$ hadron semileptonic decay

Abbiendi¹,

Ainsley²,

Åkesson³

et al. 2001

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…with b 0 and b 1 given by where Λ is the typical QCD scale and we adopt Λ To describe the transitions b, g → B, we employ the realistic nonperturbative B-hadron FFs determined at NLO in the zero-mass scheme through a global fit to e + e − -annihilation data presented by ALEPH [27] and OPAL [28] at CERN LEP1 and by SLD [29] at SLAC SLC. Specifically, for the b → B transition the power model D b (z, µ ini F ) = N z α (1 − z) β was used at the initial scale µ ini F = 4.5 GeV, while the light-quark and gluon FFs were generated via the DGLAP evolution.…”

Section: Numerical Resultsmentioning

confidence: 99%

$\mathcal{O}(\alpha_{s})$ corrections to the B-hadron energy distribution of the top decay in the general two Higgs doublet model considering GM-VFN scheme

Nejad

2012

Eur. Phys. J. C

View full text Add to dashboard Cite

We present our analytic results for the NLO corrections to the partial decay width t → H + b followed by b → BX for nonzero b-quark mass (m b = 0) in the FixedFlavor-Number scheme (FFNs). To make our predictions for the energy distribution of the outgoing bottom-flavored hadron (B-hadron) as a function of the normalized B-energy fraction x B , we apply the General-Mass Variable-Flavor-Number scheme (GM-VFNs) in the general two-Higgs-doublet model. In order to describe both the b-quark and the gluon hadronizations in top decay we use fragmentation functions extracted from data from e + e − machines. We find that the most reliable prediction for the B-hadron energy spectrum is made in the GM-VFN scheme.

show abstract

“…Traditionally, this is accomplished by fitting the fragmentation function at the scale µ 0 ∼ m b to data on e + e − → bb [25,26]. Since µ 0 ∼ m b is a perturbative scale, we may attempt to completely factorize perturbative and nonperturbative contributions, by writing the heavy quark fragmentation function as a convolution of the perturbative fragmentation function D b (µ, x) and the "non-perturbative" fragmentation function…”

Section: The Fragmentation Functionmentioning

confidence: 99%

“…[22] D np (x) was determined from fits to the e + e − → bb data by ALEPH and SLD collaborations [25,26]. For numerical calculations, we use results reported in that reference.…”

Section: The Fragmentation Functionmentioning

confidence: 99%

Next-to-leading order QCD effects and the top quark mass measurements at the LHC

Biswas

Melnikov

Schulze

2010

J. High Energ. Phys.

View full text Add to dashboard Cite

It is anticipated that a number of techniques to measure the top quark mass at the LHC will yield m top with uncertainties of about 0.5 − 1 percent. These uncertainties are mostly theoretical; they are usually estimated using parton shower Monte Carlo programs whose reliability at this level of precision is difficult to assess. The goal of this paper is to contrast those estimates with the results of NLO QCD computations for a few observables, often discussed in the context of high-precision top quark mass measurements at the LHC. In particular, we study the NLO QCD corrections to the invariant mass distribution of a charged lepton and a B-meson in lepton+jets channels. In the dilepton channel we investigate the invariant mass distribution of a charged lepton and a b-jet, the average energy of the two leptons and the average energy of the b-jets from top decays.

show abstract

Precise Measurement of theb-Quark Fragmentation Function inZ0Boson Decays

Cited by 64 publications

References 33 publications

Measurement of $|{\rm V}_{\rm ub}|$ using $b$ hadron semileptonic decay

Measurement of $|{\rm V}_{\rm ub}|$ using $b$ hadron semileptonic decay

$\mathcal{O}(\alpha_{s})$ corrections to the B-hadron energy distribution of the top decay in the general two Higgs doublet model considering GM-VFN scheme

Next-to-leading order QCD effects and the top quark mass measurements at the LHC

Contact Info

Product

Resources

About