Comments on low mass dissociation at the LHC in the context of the discrepancy between the ATLAS and TOTEM measurements of σtot\sigma_{tot}

The cross section for low mass dissociation at LHC energies is estimated in a partly data driven approach. The result is compared to the Monte Carlo estimate from the QGSJET-II-03 model used by the TOTEM experiment in the determination of $\sigma_{tot}$ via the luminosity-independent method. Significant differences are found and possible consequences are explored and discussed.Comment: 11 pages, 5 figure

The total cross section for proton-proton interactions at the FCC

The lower and upper limits of the total cross section ($\sigma_{tot}$) at the projected FCC-hh have been estimated. A lower limit has been estimated using dispersion relations in combination with recent LHC data of $\sigma_{tot}$ and the $\rho$-parameter. The upper limit has been estimated using the standard $ln^{2}(s)$ evolution of $\sigma_{tot}$. Some models giving values in between those limits are also discussed

The high luminosity upgrade from an ATLAS perspective. (contribution to the LHC-LUMI-06 workshop in Valencia)

The Super LHC will operate at a luminosity about ten times that of LHC. A short summary of issues related to the corresponding upgrade of ATLAS is given. The implications for ATLAS for some of the proposed machine upgrade scenarios are discussed, including the possibilities to integrate magnets inside ATLAS

Diffractive measurements in ATLAS

Diffractive measurements in ATLA

Measurement of the total cross-section and soft diffraction by the ATLAS and TOTEM experiments at the LHC

This paper reviews measurements of the total proton–proton cross-section at 7 TeV and 8 TeV by the ATLAS and TOTEM collaboration at the LHC. Similarities and differences between the two experiments are discussed. Some results on soft diffraction are also reviewed. The paper ends with a discussion of prospects and future plans of both experiments

Measurements of the elastic, inelastic and total cross sections in pp collisions with ATLAS subdetectors

Results from the ATLAS experiment at LHC on the total cross section (σtot), the inelastic cross section (σinel), and the elastic cross section (σel) at √s=7 TeV are summarized . All the results are based upon measurements of the differential elastic cross section using the Roman Pot technique which allow to approach the detectors close to the beam. The results will be compared to other experiments and will also be discussed in relation to previous ATLAS measurements based upon “minimum bias“ data

Feasibility of elastic scattering measurements in the dip region at TEVATRON energies in the LHC

We look into the feasibility of measuring pp forward scattering in the dip region around −t = 0.6 GeV2 at the LHC at energies comparable to the pp measurements at the TEVATRO

Feasibility of elastic scattering measurements in the dip region at TEVATRON energies in the LHC

We look into the feasibility of measuring pp forward scattering in the dip region around −t = 0.6 GeV2 at the LHC at energies comparable to the pp measurements at the TEVATRO

Rapid Changes in Ground Vegetation of Mature Boreal Forests-An Analysis of Swedish National Forest Inventory Data

The boreal forest floor vegetation is critical for ecosystem functioning and an important part of forest biodiversity. Given the ongoing global change, knowledge on broad-scale changes in the composition and abundance of different plant species and species groups is hence important for both forest conservation and management. Here, we analyse permanent plot data from the National Forest Inventory (NFI) on changes in the vegetation over a 10-year period in four regions of Sweden. To limit the direct and relatively well-known effects of forest management and associated succession, we only included mature forest stands not influenced by forestry during the 10 years between inventories, and focused on vegetation change mainly related to other factors. Results show strong decrease among many species and species groups. This includes dominant species such as Vaccinimum myrtillus and Deschampsia flexuosa as well as several forest herbs. The only species increasing are some mosses in the southern regions. Our data do not allow for a causal interpretation of the observed patterns. However, the changes probably result from latent succession in combination with climate change and nitrogen deposition, and with time lags complicating the interpretation of their relative importance. Regardless of the cause, the observed changes are on a magnitude that suggest impacts on ecosystem functioning and hence highlight the need for more experimental work