238 documents found, page 1 of 24

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A compact dication source for Ba2+ tagging and heavy metal ion sensor development

Navarro, K.E.; Baeza-Rubio, J.; Boyd, M.; Foss, F.W.; Giri, S.; Jones, B.J.P.; Miller, R.L.; Nygren, D.R.; Samaniego, F.J.; Stogsdill, K.

We present a tunable metal ion beam that delivers controllable ion currents in the picoamp range for testing of dry-phase ion sensors. Ion beams are formed by sequential atomic evaporation and single or multiple electron impact ionization, followed by acceleration into a sensing region. Controllability of the ionic charge state is achieved through tuning of electrode potentials that influence the retention time...


Reflectance and fluorescence characteristics of PTFE coated with TPB at visible...

Haefner, J.; Fahs, A.; Ho, J.; Stanford, C.; Guenette, R.; Adams, C.; Almazán, H.; Álvarez, V.; Aparicio, B.; Aranburu, A.I.; Arazi, L.; Arnquist, I.J.

Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. In noble element systems, it is often coated with tetraphenyl butadiene (TPB) to allow detection of vacuum ultraviolet scintillation light. In this work this dependence is investigated for PTFE coated with TPB in air for light of wavelengths of 200 nm, 260 nm, and 450 nm. Th...


Odderon Exchange from Elastic Scattering Differences between pp and p p ¯ Data ...

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Alves, G. A.; Antchev, G.

Made available in DSpace on 2022-04-28T19:42:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-08-06; We describe an analysis comparing the pp¯ elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96 TeV to that in pp collisions as measured by the TOTEM Collaboration at 2.76, 7, 8, and 13 TeV using a model-independent approach. The TOTEM cross sections, extrapolated ...

Date: 2022   |   Origin: Oasisbr

Measurement of the forward-backward asymmetries in the production of Ξ and Ω ba...

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

Made available in DSpace on 2022-04-28T19:03:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-06-01; We measure the forward-backward asymmetries AFB of charged Ξ and Ω baryons produced in pp collisions recorded by the D0 detector at the Fermilab Tevatron collider at s=1.96 TeV as a function of the baryon rapidity y. We find that the asymmetries AFB for charged Ξ and Ω baryons are consistent with zero w...

Date: 2022   |   Origin: Oasisbr

Evidence for a Bs0 π± State

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

Made available in DSpace on 2022-04-28T19:03:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-07-07; We report evidence for a narrow structure, X(5568), in the decay sequence X(5568)→Bs0π±, Bs0→J/ψφ, J/ψ→μ+μ-, φ→K+K-. This is evidence for the first instance of a hadronic state with valence quarks of four different flavors. The mass and natural width of this state are measured to be m=5567.8±2.9(stat)-1...

Date: 2022   |   Origin: Oasisbr

Bs0 lifetime measurement in the CP -odd decay channel Bs0 →j /ψ f0 (980)

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

Made available in DSpace on 2022-04-28T19:04:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-07-06; The lifetime of the Bs0 meson is measured in the decay channel Bs0→J/ψπ+π- with 880≤Mπ+π-≤1080 MeV/c2, which is mainly a CP-odd state and dominated by the f0(980) resonance. In 10.4 fb-1 of data collected with the D0 detector in Run II of the Tevatron, the lifetime of the Bs0 meson is measured to be τ(B...

Date: 2022   |   Origin: Oasisbr

Measurement of the top quark mass using the matrix element technique in dilepto...

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

Made available in DSpace on 2022-04-28T19:04:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-08-18; National Science Foundation; Russian Foundation for Basic Research; We present a measurement of the top quark mass in pp collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider. The data were collected by the D0 experiment corresponding to an integrated luminosity of 9.7 fb-1...

Date: 2022   |   Origin: Oasisbr

Measurement of the inclusive t t production cross section in p p collisions at ...

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

Made available in DSpace on 2022-04-28T19:05:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-11-23; National Science Foundation; The inclusive cross section of top quark-antiquark pairs produced in pp collisions at s=1.96 TeV is measured in the lepton+jets and dilepton decay channels. The data sample corresponds to 9.7 fb-1 of integrated luminosity recorded with the D0 detector during Run II of the Fe...

Date: 2022   |   Origin: Oasisbr

Measurement of top quark polarization in tt¯ lepton+jets final states

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

Made available in DSpace on 2022-04-28T19:05:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-09; We present a measurement of top quark polarization in tt- pair production in pp- collisions at s=1.96 TeV using data corresponding to 9.7 fb-1 of integrated luminosity recorded with the D0 detector at the Fermilab Tevatron Collider. We consider final states containing a lepton and at least three jets. T...

Date: 2022   |   Origin: Oasisbr

Measurement of the direct CP violating charge asymmetry in B± →μ±νμD0 decays

Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Agnew, J. P.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Askew, A.; Atkins, S.

Made available in DSpace on 2022-04-28T19:06:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-02-08; Ministry of Education and Science of the Russian Federation; Science and Technology Facilities Council; We present the first measurement of the CP violating charge asymmetry in B±→μ±νμD0 decays using the full Run II integrated luminosity of 10.4 fb-1 in proton-antiproton collisions collected with the D0...

Date: 2022   |   Origin: Oasisbr

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