Measurement Of The J Psi Meson And B Hadron Production Cross Sections In P Anti P Collisions At Snn1 2
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| Total Pages | : 59 |
| Release | : 2004 |
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Download Measurement of the J/psi Meson and B-hadron Production Cross Sections in P Anti-p Collisions at S(NN)**1/2 Book in PDF, Epub and Kindle
We present a new measurement of the inclusive and differential production cross sections of J/[psi] mesons and b-hadrons in proton-antiproton collisions at √s = 1960 GeV. The data correspond to an integrated luminosity of 39.7 pb−1 collected by the CDF Run II detector. We find the integrated cross section for inclusive J/[psi] production for all transverse momenta from 0 to 20 GeV/c in the rapidity range
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| Total Pages | : 56 |
| Release | : 2004 |
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Download B Physics Book in PDF, Epub and Kindle
The authors present a new measurement of the inclusive and differential production cross sections of J/[psi] mesons and b-hadrons in proton-antiproton collisions at √s = 1960 GeV. The data correspond to an integrated luminosity of 39.7 pb−1 collected by the CDF Run II detector. They find the integrated cross section for inclusive J/[psi] production for all transverse momenta from 0 to 20 GeV/c in the rapidity range
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| Total Pages | : 123 |
| Release | : 2006 |
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Download Measurement of J/psi Meson and B-hadron Production Cross Section at Sqrt(s) Book in PDF, Epub and Kindle
A new measurement of the inclusive and differential production cross sections of J/[psi] mesons and b-hadrons in proton-antiproton collisions at √s = 1960 GeV is presented. The data correspond to an integrated luminosity of 39.7 pb−1 collected by the CDF Run II detector. The integrated cross section for inclusive J/[psi] production for all transverse momenta from 0 to 20 GeV/c in the rapidity range
| Author | : Grant Valentine Riley |
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| Total Pages | : 141 |
| Release | : 2017 |
| Genre | : Collisions (Nuclear physics) |
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Download Measurement of the Prompt J/Psi Pair Production Cross Section in Pp Collisions at Sqrt(s) Book in PDF, Epub and Kindle
The cross section for the prompt production of [J/Psi] meson pairs in proton-proton collisions at √ s[sqrt(s)] = 8 TeV at the LHC from a sample corresponding to an integrated luminosity of 20.2±0.5 fb−1 [inverse femtobarns] has been measured with the CMS detector. It provides unique insight into particle production and proton structure in proton-proton (pp) collisions. The two [J/Psi] mesons are fully reconstructed in their [mu+ mu-] decay. An acceptance region is defined by the individual [J/Psi] transverse momentum p [J/Psi pT] and rapidity y [J/Psi Rapidity]. The total fiducial cross section assuming unpolarized prompt [J/Psi] pair production is found to be [sigma_fid] = 195.7 ± 11.1 (stat) ± 22.1 (syst) ± 5.1 (lumi) ± 2.3 (BF) pb. The differential cross sections for prompt [J/Psi] pair production within this acceptance region are measured in eight event variables. Most predictions for particle production in pp collisions at the LHC assume dominance of single parton (gluon, quark) interactions (SPS) at the leading order perturbation theory. This assumption is tested with the final state measured in this analysis. Significant contributions from next-to-leading order processes and double parton scattering (DPS) are observed. In addition, the single [J/Psi] production cross section is estimated from theory and measured with pp collision data. Single [J/Psi] production is compared to the pair production via DPS and quantified via an effective cross section. This quantity is further compared to several particle pair production processes. In particular, the [J/Psi] pair production probes the contributions of gluons. All particle production measurements with CMS depend on the precise knowledge of the LHC luminosity. A detector, the Pixel Luminosity Telescope, based on solid state technology is used to count charged particle tracks from pp collisions, a measure of the instantaneous luminosity. The measurement is provided online for every crossing of the LHC beams. Tests of sensors and the development work for the detector are presented.
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| Release | : 2016 |
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Download Measurement of the $B_c^{\pm}$ Production Cross Section in $p\bar{p}$ Collisions at $\sqrt{s} Book in PDF, Epub and Kindle
Here, we describe a measurement of the ratio of the cross sections times branching fractions of the Bc+ meson in the decay mode Bc+ → J/[psi][mu]+[nu] to the B+ meson in the decay mode B+ → J/[psi]K+ in proton-antiproton collisions at center-of-mass energy √s = 1.96 TeV. The measurement is based on the complete CDF Run II data set, which comes from an integrated luminosity of 8.7 fb-1. The ratio of the production cross sections times branching fractions for Bc+ and B+ mesons with momentum transverse to the beam greater than 6 GeV/c and rapidity magnitude smaller than 0.6 is 0.211 ± 0.012(stat)-0.020+0.021(syst). Using the known B+ → J/[psi]K+ branching fraction, the known B+ production cross section, and a selection of the predicted Bc+ → J/[psi][mu]+[nu] branching fractions, the range for the total Bc+ production cross section is estimated.
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| Release | : 2001 |
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Download Measurement of the B Meson Differential Cross-section in P[bar P] Collisions At[radical] Book in PDF, Epub and Kindle
This paper presents a direct measurement of the differential[ital B][sup+] and[ital B][sup 0] cross sections, [ital d[sigma]/dp[sub T]] in[ital p][ital[anti p]] collisions at[radical]s= 1.8 TeV using a sample of 74[ital pb][sup -1] accumulated by the Collider Detector at Fermilab (CDF). The cross sections are measured in the central pseudorapidity region[vert-bar][eta][vert-bar][lt] 1 for[ital p[sub T]]([ital B])[gt] 6.0 GeV/c by fully reconstructing the[ital B] meson decays[ital B][sup+][r-arrow][ital J/[psi]K[sup+]] and[ital B][sup 0][r-arrow][ital J/[psi]K[sup*0]](892), where[ital J/[psi]][r-arrow][mu][sup+][mu][sup -] and[ital K][sup*0][r-arrow][ital K][sup+][pi][sup -]. The prediction of next-to- leading order QCD is consistent with the shape of the differential cross section but is low by a factor of 2.1[+-]0.2[+-]0.3. The integrated[ital B] meson cross section for[ital p[sub T]]([ital B])[gt] 6.0 GeV/c is determined to be[sigma]([ital B][sup -]= 3. 54[+-]0.22[+-]0.53[mu][ital b].
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| Release | : 2017 |
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Download Measurement of Prompt and Nonprompt J/psi Production in Pp and PPb Collisions at Sqrt(s[NN] Book in PDF, Epub and Kindle
This paper reports the measurement of J/psi meson production in proton-proton (pp) and proton-lead (pPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV by the CMS experiment at the LHC. The data samples used in the analysis correspond to integrated luminosities of 28 inverse picobarns and 35 inverse nanobarns for pp and pPb collisions, respectively. Prompt and nonprompt J/psi mesons, the latter issuing from the decay of B mesons, are measured in their dimuon decay channels. Differential cross sections are measured in the transverse momentum range of 2
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| Release | : 2015 |
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Download Measurement of the Ratio of the Production Cross Sections Times Branching Fractions of Bc" 2!J/[psi][pi]"and B" 2!J/[psi] K" and B(Bc"2!J/[psi] [pi]"[pi]"[pi]-/+)/B(Bc" 2!J/[psi] [pi]") in Pp Collisions at [arrow]" Book in PDF, Epub and Kindle
The ratio of the production cross sections times branching fractions ([sigma](Bc") B(Bc" 2!J/[psi][pi]"))/([sigma](B") B(B" 2!J/[psi]K") is studied in proton-proton collisions at a center-of-mass energy of 7 TeV with the CMS detector at the LHC. The kinematic region investigated requires Ba, sub>c" and B"mesons with transverse momentum p[tau]> 15 GeV and rapidity.
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| Total Pages | : 35 |
| Release | : 2014 |
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Download Measurement of Prompt $J/\psi$ Pair Production in Pp Collisions at $ \sqrt{s} $ Book in PDF, Epub and Kindle
Production of prompt J/[psi] meson pairs in proton-proton collisions at √s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb-1. The two J/[psi] mesons are fully reconstructed via their decays into [mu] + [mu] - pairs. This observation provides for the first time access to the high-transverse-momentum region of J/[psi] pair production where model predictions are not yet established. The total and differential cross sections are measured in a phase space defined by the individual J/[psi] transverse momentum (p T J/[psi] ) and rapidity (
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| Release | : 2005 |
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Download Measurement of the B Meson Differential Cross-sections in P[anti P] Collisions at [radical] Book in PDF, Epub and Kindle
This paper presents the first measurement of the differential B[sup [+-]] and B[sup 0] cross-sections, d[sigma]/dp[sub [Tau]], in p[anti p] collisions at [radical]s = 1.8 TeV. The data sample used represents an integrated luminosity of 19.3 [+-] 0.8 pb[sup [minus]1] accumulated by the Collider Detector at Fermilab (CDF). The cross-sections are measured over the p[sub T] range 6--15 GeV/c in the central pseudorapidity region [vert-bar][eta][vert-bar]
