CERN Accelerating science

Preprints

Ultimi arrivi:
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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2017-01-16
11:53
Measurement of $C\!P$ asymmetry in $B_s^0\to D_s^{\mp}K^{\pm}$ decays /LHCb Collaboration
Reported are measurements of the time-dependent $C\!P$ violating observables in $B_s^0\to D_s^{\mp}K^{\pm}$ decays using a dataset corresponding to $3.0\,\text{fb}^{-1}$ of $pp$ collisions recorded with the LHCb detector in Run 1 of the LHC. We measure $C_f = 0.735 \pm 0.142 \pm 0.048$, $S_f = -0.518 \pm 0.202 \pm 0.073$, $S_{\bar{f}} = -0.496 \pm 0.197 \pm 0.071$, $D_f = 0.395 \pm 0.277 \pm 0.122$, $D_{\bar{f}} = 0.314 \pm 0.274 \pm 0.107$, where the uncertainties are statistical and systematic, respectively. [...]
LHCb-CONF-2016-015; CERN-LHCb-CONF-2016-015.- Geneva : CERN, 2017 - 21. Fulltext: LHCb-CONF-2016-015 - PDF; Figs - ZIP;
In : 9th International Workshop on the CKM Unitarity Triangle, Mumbai, India, 28 Nov - 2 Dec 2016

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2017-01-16
09:45
Calculation of the pole-face windings compensation at injection
MPS-Int-MA-65-8 ; CERN-MPS-Int-MA-65-8.
- 1965. - 28 p.
Full text

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2017-01-16
09:41
Evaluation of slot line pick-up sensitivity / Boussard, D
CERN-SPS-Tech-Note-85-009-ARF ; SPS-ARF-Note-85-9.
- 1985. - 7 p.
Full text

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2017-01-16
07:46
Some results of test beam studies of Transition Radiation Detector prototypes at CERN / Tikhomirov, V.O. (Lebedev Inst. ; Moscow Phys. Eng. Inst.) ; Brooks, T. (CERN) ; Joos, M. (CERN) ; Rembser, C. (CERN) ; Celebi, E. (Bogazici U.) ; Gurbuz, S. (Bogazici U.) ; Cetin, S.A. (Istanbul Bilgi U.) ; Konovalov, S.P. (Lebedev Inst.) ; Zhukov, K. (Lebedev Inst.) ; Fillipov, K.A. (Lebedev Inst. ; Moscow Phys. Eng. Inst.) et al.
Operating conditions and challenging demands of present and future accelerator experiments result in new requirements on detector systems. [...]
arXiv:1612.02858.
- 5 p.
Full text

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2017-01-13
07:31
Test beam studies of the TRD prototype filled with different gas mixtures based on Xe, Kr, and Ar / Celebi, E (Bogazici U.) ; Brooks, T. (CERN) ; Joos, M. (CERN) ; Rembser, C. (CERN) ; Gurbuz, S (Bogazici U.) ; Cetin, S.A. (Istanbul Bilgi U.) ; Konovalov, S.P. (Lebedev Inst.) ; Tikhomirov, V.O. (Moscow Phys. Eng. Inst. ; Lebedev Inst.) ; Zhukov, K. (Lebedev Inst.) ; Fillipov, K.A. (Moscow Phys. Eng. Inst. ; Lebedev Inst.) et al.
Towards the end of LHC Run1, gas leaks were observed in some parts of the Transition Radiation Tracker (TRT) of ATLAS. [...]
arXiv:1612.02623.
- 5.
Full text

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2017-01-13
07:31
Thermodynamics of strongly interacting plasma with high accuracy / Giusti, Leonardo (CERN ; INFN, Milan Bicocca ; Milan Bicocca U. ; Geneva U., Dept. Theor. Phys.) ; Pepe, Michele (INFN, Milan Bicocca)
The equation of state of $SU(3)$ Yang-Mills theory is investigated in the framework of a moving reference frame. [...]
arXiv:1612.02337.
- 7.
Full text

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2017-01-12
11:20
Measurement of the top quark pair production cross section using dilepton events at 5.02 TeV / Gonzalez Fernandez, Juan Rodrigo (Oviedo U.) /CMS Collaboration
At hadron colliders, top quarks - the heaviest elementary particles known- are dominantly produced in pairs (ttbar), a production mechanism having been discovered more than twenty years ago at Tevatron, Fermilab. Although the ttbar process has already entered the domain of precision Physics, especially with the advent of the multi-TeV energies at the CERN Large Hadron Collider, there still remains room for dedicated experimental measurements of the top quark in the gap of energies between Tevatron and LHC. [...]
CMS-CR-2017-002.- Geneva : CERN, 2017 - 5 p. Fulltext: PDF;
In : 9th International Workshop on Top Quark Physics, Olomouc, Czech Republic, 19 - 29 Sep 2016

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2017-01-11
07:31
Measurement of the $t$-channel single top-quark and top-antiquark differential cross-sections in $pp$ collisions at $\sqrt{s} = 8~\textrm{TeV}$ with the ATLAS detector / Seema, Pienpen (Bonn U.)
In this document, differential cross-section measurements of $t$-channel single top-quark production are presented. [...]
arXiv:1701.02306.
- 5 p.
Full text

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2017-01-11
07:31
Exploring the squark flavour structure of the MSSM / De Causmaecker, Karen (Brussels U., IIHE) ; Fuks, Benjamin (Paris, LPTHE ; IUF, Paris) ; Herrmann, Björn (Annecy, LAPTH) ; Mahmoudi, Farvah (Lyon U. ; CERN) ; O'Leary, Ben (Wurzburg U.) ; Porod, Werner (Wurzburg U.) ; Sekmen, Sezen (Kyungpook Natl. U.) ; Strobbe, Nadja (Fermilab)
We present an extensive study of the MSSM parameter space allowing for general generation mixing in the squark sector. [...]
LAPTH-CONF-065-16 ; CERN-TH-2016-234 ; FERMILAB-CONF-16-500-PPD ; arXiv:1701.01700.
- 2017. - 4 p.
Full text - Preprint

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