Spires | Europhys.Lett. 98 (2012) 31002 | arXiv:1205.4105 | CERN-PH-EP-2012-106 | TOTEM 2012-01
The TOTEM experiment has measured the charged particle pseudorapidity density $dN_\text{ch}/d\eta$ in pp collisions at $\sqrt{s} = 7$\,TeV for $5.3 < |\eta| < 6.4$ in events with at least one charged particle with transverse momentum above 40 MeV/c in this pseudorapidity range.
Spires | CMS-PAS-QCD-10-024 | https://cdsweb.cern.ch/record/1341853?ln=en
Pseudorapidity distributions of charged particles in $pp$ collisions at $\sqrt{s} = 0.9$ and 7~TeV with at least one central charged particle.
CMS-PAS-QCD-11-010 | http://cdsweb.cern.ch/record/1463352
Measurements of the production of $K^0_S$, $\Lambda$ and $\bar{Lambda}$ particles in the underlying activity of events with a pT scale ranging from 1 to 50 GeV/$c$ in $pp$ collisions at $\sqrt{s} = 7$\;TeV.
Spires | CMS-PAS-FWD-11-003 | http://cdsweb.cern.ch/record/1434458
Ratio of the energy deposited in the pseudorapidity range $-6.6 < \eta < -5.2$ for events with a charged particle jet with $|\eta|<2$ with respect to the energy in inclusive events, as a function of charged particle jet transverse momentum for $\sqrt{s}=$0.9, 2.76 and 7 TeV.
Spires | JHEP 1111 148 | doi:10.1007/JHEP11(2011)148 | arXiv:hep-ex/1110.0211
Forward energy flow measured by CMS at $\sqrt{s} = 0.9$ and 7~TeV in MB and dijet events.
Spires | J. High Energy Phys 09 (2011) 109
A measurement of the underlying activity in scattering processes with a hard scale in the several-GeV region is performed in proton-proton collisions at Energies of 0.9 and 7 TeV, using data collected by the CMS experiment at the LHC. The production of charged particles with pseudorapidity |eta| < 2 and transverse momentum pT > 0.5 GeV/c is studied in the azimuthal region transverse to that of the leading set of charged particles forming a track-jet. Various comparisons are made between the two different energies and also beteen two sets of cuts on pT for leading track jet pT-leading > 3 GeV and pT-leading > 20 GeV. The activity is studied using 5 types of plots. 2 profile plots for the multiplcity of charged particles and the scalar sum of pT. and 3 distributions for the two previous quantities as well we pT for all the particles in the transverse region.
Spires | JHEP 05 (2011) 064 | doi:10.1007/JHEP05(2011)064 | arXiv:1102.4282 [hep-ex]
The spectra of Kshort, Lambda, and Cascade- particles were measured versus transverse-momentum (pT) and rapidity(y) in proton-proton collisions at center-of-mass energies 900 and 7000 GeV. The production is normalized to all non-single-diffractive (NSD) events using corrections for trigger and selection efficiency, acceptance, and branching ratios. The results cover a rapidity range of |y|<2 and a pT range from 0 to 10 GeV (Kshort and Lambda) and 0 to 6 GeV (Cascade-). Antiparticles are included in all measurements so only the sum of Lambda and Lambdabar and Cascade- and anti-Cascade- are given. The rapidity distributions are shown versus |y| but normalized to a unit of y. Ratios of Lambda/Kshort and Cascade-/Lambda production versus pT and |y| are also given, with somewhat smaller systematic uncertainties than obtained from taking the ratio of the individual distributions.' The data were corrected according to the SD/DD/ND content of the CMS trigger, as predicted by pythia6. The uncertainties connected with correct or uncorrect modelling of diffraction were included in the systematic errors.
Spires | Phys.Lett.B699:48-67,2011 | arXiv:1102.0068
Central transverse Thrust and Minor have been measured in proton-proton collisions at sqrt(s)=7 TeV, with a data sample collected with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 3.2 inverse picobarns. Input for the variables are anti-kt jets with $R=0.5$.
Spires | J. High Energy Phys. 01 (2011) 079 | doi:10.1007/JHEP01(2011)079 | arXiv:1011.5531 [hep-ex]
Measurements of primary charged hadron multiplicity distributions are presented for non-single-diffractive events in proton-proton collisions at centre-of-mass energies of sqrt(s) = 0.9, 2.36, and 7 TeV, in five pseudorapidity ranges from |eta|<0.5 to |eta|<2.4. The data were collected with the minimum-bias trigger of the CMS experiment during the LHC commissioning runs in 2009 and the 7 TeV run in 2010. The average transverse momentum as a function of the multiplicity is also presented. The measurement of higher-order moments of the multiplicity distribution confirms the violation of Koba-Nielsen-Olesen scaling that has been observed at lower energies.
Spires | Phys.Rev.Lett.105:022002,2010 | doi:10.1103/PhysRevLett.105.022002 | arXiv:1005.3299 [hep-ex]
Charged particle spectra are measured in proton-proton collisions at center-of-mass energies 7000 GeV. The spectra are normalized to all non-single-diffractive (NSD) events using corrections for trigger and selection efficiency, acceptance, and branching ratios. There are transverse-momentum (pT) spectra from 0.1 to 2 GeV in bins of pseudorapidity (eta) and the pT spectrum from 0.1 to 6 GeV for |eta|<2.4. The eta spectra come from the average of three methods and cover |eta|<2.5 and are corrected to include all pT. The data were corrected according to the SD/DD/ND content of the CMS trigger, as predicted by pythia6. The uncertainties connected with correct or uncorrect modelling of diffraction were included in the systematic errors.
Spires | arXiv:1208.6256
The measurement of the sum of the transverse energy of particles as a function of particle pseudorapidity, eta, in proton-proton collisions at a centre-of-mass energy, $\sqrt(s) = 7 TeV$ using the ATLAS detector at the Large Hadron Collider. The measurements are performed in the region $|\eta| < 4.8$ for two event classes: those requiring the presence of particles with a low transverse momentum and those requiring particles with a significant transverse momentum (dijet events where both jets have $E_T > 20$ GeV). In the second dataset measurements are made in the region transverse to the hard scatter.
Spires | arXiv:1208.0563 [hep-ex]
Distributions sensitive to the underlying event are studied in events containing one or more charged-particle. Jets are reconstructed using the antikt algorithm with radius parameter R varying between 0.2 and 1.0. Distributions of the charged-particle multiplicity, the scalar sum of the transverse momentum of charged particles, and the average charged-particle pT are measured as functions of pT^JET in regions transverse to and opposite the leading jet for 4 GeV < pT^JET < 100 GeV. In addition, the R-dependence of the mean values of these observables is studied.
Spires | Phys.Rev. D86 (2012) 072006 | doi:10.1103/PhysRevD.86.072006 | arXiv:1206.5369 [hep-ex]
Measurements are presented of the properties of high transverse momentum jets, produced in proton-proton collisions at a center-of-mass energy of $\sqrt{s} = 7$\;TeV. Jet mass, width, eccentricity, planar flow and angularity are measured for jets reconstructed using the anti-$k_t$ algorithm with distance parameters $R = 0.6$ and 1.0, with transverse momentum $pT > 300$\;GeV and pseudorapidity $|\eta| < 2$.
Spires | JHEP 1205 (2012) 157 | CERN-PH-EP-2012-011 | doi:10.1007/JHEP05(2012)157 | arxiv:1203.3549
Two-particle angular correlations are measured in proton-proton collisions at $\sqrt(s)=900$ GeV and 7 TeV. Correlations are determined for charged particles with $\pT > 100 MeV$ and $|\eta| < 2.5$. A complicated function of both pseudorapidity and azimuth is observed. Results are obtained from an inclusive sample of events (900 GeV and 7 TeV), as well as a sample satisfying $n_{ch} \ge 20$ (7 TeV only).
Spires | arXiv:1103.1816
Underlying event measurements with the ATLAS detector at the LHC at center-of-mass energies of 900 GeV and 7 TeV, using calorimeter clusters rather than charged tracks.
Spires | arXiv:1111.1297v2 [hep-ex] | Phys.Rev. D85 (2012) 012001
The production of Kshort and Lambda hadrons is studied in inelastic pp collisions at sqrt(s) = 0.9 and 7 TeV collected with the ATLAS detector at the LHC using a minimum-bias trigger. The observed distributions of transverse momentum, rapidity, and multiplicity are corrected to hadron level in a model-independent way within well defined phase-space regions. The distribution of the production ratio of Lambdabar to Lambda baryons is also measured. The results are compared with various Monte Carlo simulation models. Although most of these models agree with data to within 15% in the Kshort distributions, substantial disagreements with data are found in the Lambda distributions of transverse momentum.
Spires | Phys.Rev.D 84 (2011) 054001 | doi:10.1103/PhysRevD.84.054001 | arXiv:1107.3311 | ATLAS-STDM-2010-14 | CERN-PH-EP-2011-110
ATLAS measurement of track jet pT, multiplicity per jet, longitudinal fragmentation, transverse momentum, radius w.r.t jet axis distributions, with jets constructed from charged tracks with $pT > 300$ MeV, using the anti-$k_T$ jet algorithm with $R = 0.4, 0.6$.
Spires | arXiv:1012.5104
Measurements from proton-proton collisions at centre-of-mass energies of sqrt(s) = 0.9, 2.36, and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimum-bias trigger. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the relationship between the mean transverse momentum and charged-particle multiplicity are measured. Measurements in different regions of phase-space are shown, providing diffraction-reduced measurements as well as more inclusive ones. The observed distributions are corrected to well-defined phase-space regions, using model-independent corrections.
Spires | Eur.Phys.J. C68 (2010) 345-354 | arXiv:1004.3514 [hep-ex]
This is an ALICE publication with pseudorapities for $\unit{0.9, 2.36 and 7}{\TeV}$ and the charged multiplicity at $\unit{7}{\TeV}$. The analysis requires at least on charged particle in the event. Only the INEL distributions are considered here
Generated at Wednesday, 28. August 2013 10:54AM