CERN Accelerating science

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Senast inlagda poster:
2017-01-19
18:14
ATS MD’s in 2016 / Fartoukh, Stephane (CERN) ; Albert, Markus (CERN) ; Le Borgne, Yannick (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Garcia-Tabares Valdivieso, Ana (Ministere des affaires etrangeres et europeennes (FR)) ; Fuchsberger, Kajetan (CERN) ; Giachino, Rossano (CERN) et al.
This report presents a summary of the Achromatic Telescopic Squeezing (ATS) scheme related activities which took place in 2016, where a new generation of ATS pre-squeezed and telescopic optics was successfully probed, namely: (i) down to a of 10 cm with pilot bunches, and (ii) with more emphasis at intermediate values of 40 cm or 33 cm where collisions were established with nominal bunches, the triplet aperture was measured and collimation measurements with pre-squeezed or moderately telescopic ATS optics were conducted..
CERN-ACC-2017-0003.
- 2016. - 25 p.

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2017-01-19
14:39
Observation of the $\varXi_{b}^{-}\to J/\psi\varLambda K^{-}$ decay
The observation of the decay $\varXi_{b}^{-}\to J/\psi\varLambda K^{-}$ is reported, using a data sample corresponding to an integrated luminosity of $3~\mathrm{fb}^{-1}$, collected by the LHCb detector in $pp$ collisions at centre-of-mass energies of $7$ and $8~\mathrm{TeV}$ [...]
CERN-EP-2016-318 ; LHCB-PAPER-2016-053.
- 2017.
Fulltext - Previous draft version - Related data file(s)

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2017-01-19
12:24
Measurement of charged-particle distributions sensitive to the underlying event in $\sqrt{s} = 13$ TeV proton-proton collisions with the ATLAS detector at the LHC
We present charged-particle distributions sensitive to the underlying event, measured by the ATLAS detector in proton-proton collisions at a centre-of-mass energy of 13 TeV, in low-luminosity Large Hadron Collider fills corresponding to an integrated luminosity of 1.6 nb$^{-1}$. [...]
CERN-EP-2016-285.
- 2017.
Fulltext - Previous draft version

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2017-01-19
09:34
Study of $J/\psi$ production in jets
The production of $J/\psi$ mesons in jets is studied in the forward region of proton-proton collisions using data collected with the LHCb detector at a center-of-mass energy of 13 TeV. [...]
CERN-EP-2017-006 ; LHCB-PAPER-2016-064.
- 2017.
Fulltext - Previous draft version - Related data file(s)

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2017-01-17
10:41
Resonant internal dumping / Steinbach, c
MPS-OP-Note-74-5 ; CERN-MPS-OP-Note-74-5.
- 1974. - 30 p.
Full text

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2017-01-17
10:27
A possibility for internal beam dumping in the CPS : the rnovable durnp solution / Gouiran, R
MPS-SR-Note-73-7 ; CERN-MPS-SR-Note-73-7.
- 1973. - 36 p.
Full text

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2017-01-17
10:25
Possibility of vertical dumping in a fixed block in the CPS / Steinbach, C
MPS-CO-Note-73-2 ; CERN-MPS-CO-Note-73-2.
- 1973. - 12 p.
Full text

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2017-01-17
10:22
Dumping the high intensity bearn / Steinbach, C ; Potier, J P
MPS-CO-Note-71-27 ; CERN-MPS-CO-Note-71-27.
- 1971. - 6 p.
Full text

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2017-01-17
10:00
Diffractive and Parton Processes with CMS and TOTEM Forward Detectors / Penzo, Aldo (Iowa U.) ; Samoylenko, Vladimir (Serpukhov, IHEP) ; Sen, Sercan (Istanbul, Tech. U.) /CMS and TOTEM Collaborations
The Compact Muon Solenoid (CMS) experiment, in the Large Hadron Collider (LHC) at CERN, has several forward sub-detectors, consisting of calorimeters close to the beam pipe, that complement the central part of CMS, which covers a pseudorapidity range from -3 to +3. The TOTEM experiment, installed around the same interaction point as CMS, is tailored for diffractive measurements. [...]
CMS-CR-2016-438.- Geneva : CERN, 2016 - 6 p. Fulltext: PDF;
In : 19th High-Energy Physics International Conference in Quantum Chromodynamics (QCD), Montpellier, France, 4 - 8 Jul 2016

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2017-01-16
12:17
First observation of a baryonic $B_s^0$ decay /LHCb Collaboration
The first observation of a baryonic $B_s^0$ decay, $B^0_s \to p \bar{\Lambda} K^-$, is reported using proton-proton collision data corresponding to an integrated luminosity of 3.0 $\text {fb}^{-1}$recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The branching fraction is measured to be $$ {\cal B}(B^0_s \to p \bar{\Lambda} K^- + \bar{B}^0_s \to p \bar{\Lambda} K^-) = \left[5.48 \,^{+0.82}_{-0.80} \pm 0.60 \pm 0.51 ({\cal B}) \pm 0.32 (f_s/f_d)\right]\times 10^{-6}\,, $$ where the first uncertainty is statistical and the second systematic, the third uncertainty accounts for the experimental uncertainty on the branching fraction of the $B^0 \to p \bar{\Lambda} \pi^-$ decay used for normalisation, and the fourth uncertainty relates to the knowledge of the ratio of $b$-quark hadronisation probabilities $f_s/f_d$. [...]
LHCb-CONF-2016-016; CERN-LHCb-CONF-2016-016.- Geneva : CERN, 2017 - 16. Fulltext: LHCb-CONF-2016-016 - PDF; LHCb-CONF-2016-016-figures - ZIP;
In : 9th International Workshop on the CKM Unitarity Triangle, Mumbai, India, 28 Nov - 2 Dec 2016

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