From photoproduction to physics

Lafferty, G. D.

doi:10.1088/0305-4616/14/2/006

Cited by 17 publications

(19 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 3: The elastic differential cross-section as determined in this analysis using the "optimised" binning. The three left-most columns describe the bins in t. The representative point gives the t value suitable for fitting [23]. The other columns are related to the differential cross-section.…”

Section: Statistical Uncertainty Adjustmentmentioning

confidence: 99%

Evidence for non-exponential elastic proton–proton differential cross-section at low |t| and s=8TeV by TOTEM

Antchev¹,

Aspell²,

Atanassov³

et al. 2015

Nuclear Physics B

134

174

View full text Add to dashboard Cite

The TOTEM experiment has made a precise measurement of the elastic proton-proton differential cross-section at the centre-of-mass energy √ s = 8 TeV based on a high-statistics data sample obtained with the β * = 90 m optics. Both the statistical and systematic uncertainties remain below 1 %, except for the t-independent contribution from the overall normalisation. This unprecedented precision allows to exclude a purely exponential differential cross-section in the range of fourmomentum transfer squared 0.027 < |t| < 0.2 GeV 2 with a significance greater than 7 σ. Two extended parametrisations, with quadratic and cubic polynomials in the exponent, are shown to be well compatible with the data. Using them for the differential cross-section extrapolation to t = 0, and further applying the optical theorem, yields total cross-section estimates of (101.5 ± 2.1) mb and (101.9 ± 2.1) mb, respectively, in agreement with previous TOTEM measurements.This article is dedicated to the memory of Prof. E. Lippmaa and Prof. M. Lo Vetere who passed away recently

show abstract

Section: Statistical Uncertainty Adjustmentmentioning

confidence: 99%

Evidence for non-exponential elastic proton–proton differential cross-section at low |t| and s=8TeV by TOTEM

Antchev¹,

Aspell²,

Atanassov³

et al. 2015

Nuclear Physics B

134

174

View full text Add to dashboard Cite

show abstract

“…where the bin spans energies a i to b i . DAMPE associated their measurement in the i-th bin with the energy E i at which the predicted flux equals the predicted average flux in that bin for the best-fit SBPL model [36], i.e., E i is defined by…”

Section: Introductionmentioning

confidence: 99%

DAMPE squib? Significance of the 1.4 TeV DAMPE excess

Fowlie

2018

Physics Letters B

View full text Add to dashboard Cite

We present a Bayesian and frequentist analysis of the DAMPE charged cosmic ray spectrum. The spectrum, by eye, contained a spectral break at about 1 TeV and a monochromatic excess at about 1.4 TeV. The break was supported by a Bayes factor of about 10 10 and we argue that the statistical significance was resounding. We investigated whether we should attribute the excess to dark matter annihilation into electrons in a nearby subhalo. We found a local significance of about 3.6σ and a global significance of about 2.3σ, including a two-dimensional look-elsewhere effect by simulating 1000 pseudo-experiments. The Bayes factor was sensitive to our choices of priors, but favoured the excess by about 2 for our choices. Thus, whilst intriguing, the evidence for a signal is not currently compelling.

show abstract

“…1 shows that the 3 He cross section [6] at x b > 2 is also decreasing very rapidly. Small bins where a cross section is decreasing rapidly, especially near a kinematic end point, can be susceptible to a large fraction of events migrating from one bin to another [7].To test if this could be the source of the discrepancy, we performed a Monte Carlo simulation that generated electron scattering events at Q 2 = 1.6 GeV 2 based on the 3 He cross section shown in Fig. 1 and then smeared E for each event with an energy resolution of σ = 0.6%.…”

mentioning

confidence: 99%