Measurement Of The Forward Backward Asymmetry In The Production Of B Pm Mesons In P Bar P Collisions

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Measurement Of The Forward Backward Asymmetry In The Production Of B Pm Mesons In P Bar P Collisions

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Author :
language : en
Publisher:
Release Date : 2015

Measurement Of The Forward Backward Asymmetry In The Production Of B Pm Mesons In P Bar P Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

We present a measurement of the forward-backward asymmetry in the production of B± mesons, AFB(B±), using B± → J/[psi]K± decays in 10.4 fb -1 of p$\bar{p}$ collisions at √ s = 1.96 TeV collected by the DØ experiment during Run II of the Tevatron collider. A nonzero asymmetry would indicate a preference for a particular flavor, i.e., b quark or $\bar{b}$ antiquark, to be produced in the direction of the proton beam. We extract AFB(B±) from a maximum likelihood fit to the difference between the numbers of forward- and backward-produced B± mesons, using a boosted decision tree to reduce background. Corrections are made for reconstruction asymmetries of the decay products. We measure an asymmetry consistent with zero: AFB(B±) = [-0.24 ± 0.41 (stat)± 0.19 (syst)]%. The standard model estimate from next-to-leading-order Monte Carlo is ASM FB(B±) = [2.31 ± 0.34 (stat.)± 0.51 (syst.)]%. There is a difference of ≈ 3 standard deviations between this prediction and our result, which suggests that more rigorous determination of the standard model prediction is needed to interpret these results.

Energy Research Abstracts

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language : en
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Release Date : 1978

Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Power resources categories.

Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.

High Energy Physics Index

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High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Nuclear physics categories.

Inis Atomindex

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Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Nuclear energy categories.

Physics Briefs

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Release Date : 1989

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Government Reports Announcements Index

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Release Date : 1994

Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Science categories.

Science Citation Index

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Science Citation Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Science categories.

Vols. for 1964- have guides and journal lists.

Measurement Of The Forward Backward Asymmetry In Lambda B0 And Bar Lambda B 0 Baryon Production In P Bar P Collisions At Sqrt S

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language : en
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Release Date : 2015

Measurement Of The Forward Backward Asymmetry In Lambda B0 And Bar Lambda B 0 Baryon Production In P Bar P Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Measurement Of The Forward Backward Asymmetry In The Production Of B Mesons In Pp U00af Collisions At U221a S

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language : en
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Release Date : 2015

Measurement Of The Forward Backward Asymmetry In The Production Of B Mesons In Pp U00af Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

We present a measurement of the forward-backward asymmetry in the production of B± mesons, AFB(B±), using B± → J/?K± decays in 10.4 fb-1 of pp¯ collisions at √s = 1.96 TeV collected by the D0 experiment during Run II of the Tevatron collider. A nonzero asymmetry would indicate a preference for a particular flavor, id est, b quark or b¯ antiquark, to be produced in the direction of the proton beam. We extract AFB(B±) from a maximum likelihood fit to the difference between the numbers of forward- and backward-produced B± mesons. We measure an asymmetry consistent with zero: AFB(B±) = [-0.24 ± 0.41 (stat) ± 0.19 (syst)]%.

Measurement Of The Forward Backward Asymmetry In B0 And Bar U039b B0 Baryon Production In P Bar P Collisions At Sqrt S

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language : en
Publisher:
Release Date : 2015

Measurement Of The Forward Backward Asymmetry In B0 And Bar U039b B0 Baryon Production In P Bar P Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

We measure the forward-backward asymmetry in the production of ?0b and ?¯0b baryons as a function of rapidity in pp¯ collisions at √s = 1.96 TeV using 10.4 fb-1 of data collected with the D0 detector at the Fermilab Tevatron collider. The asymmetry is determined by the preference of ?0b or ?¯0b particles to be produced in the direction of the beam protons or antiprotons, respectively. As a result, the measured asymmetry integrated over rapidity y in the range 0.1