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14 papers found.
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Precision probes of QCD at high energies

New physics, that is too heavy to be produced directly, can leave measurable imprints on the tails of kinematic distributions at the LHC. We use energetic QCD processes to perform novel measurements of the Standard Model (SM) Effective Field Theory. We show that the dijet invariant mass spectrum, and the inclusive jet transverse momentum spectrum, are sensitive to a dimension 6...

The photo-philic QCD axion

We propose a framework in which the QCD axion has an exponentially large coupling to photons, relying on the “clockwork” mechanism. We discuss the impact of present and future axion experiments on the parameter space of the model. In addition to the axion, the model predicts a large number of pseudoscalars which can be light and observable at the LHC. In the most favorable...

Phases of cannibal dark matter

A hidden sector with a mass gap undergoes an epoch of cannibalism if number changing interactions are active when the temperature drops below the mass of the lightest hidden particle. During cannibalism, the hidden sector temperature decreases only logarithmically with the scale factor. We consider the possibility that dark matter resides in a hidden sector that underwent...

Strong tW scattering at the LHC

Deviations of the top electroweak couplings from their Standard Model values imply that certain amplitudes for the scattering of third generation fermions and longitudinally polarized vector bosons or Higgses diverge quadratically with momenta. This high-energy growth is a genuine signal of models where the top quark is strongly coupled to the sector responsible for electroweak...

Precision Higgsstrahlung as a probe of new physics

A “Higgs factory”, an electron-positron collider with center-of-mass energy of about 250 GeV, will measure the cross section of the Higgsstrahlung process, e + e − → hZ, with sub-percent precision. This measurement is sensitive to a variety of new physics scenarios. In this paper, we study two examples. First, we compute corrections to the e + e − → hZ differential cross section...

Higgs couplings and naturalness in λ-SUSY

We study Higgs boson couplings in the large-λ version of the Next-to-Minimal Supersymmetric Standard Model, known as λ-SUSY. We find that the predicted deviations from the Standard Model (SM) in these couplings are inversely correlated with the amount of fine-tuning needed to accommodate a 126 GeV Higgs. In the most natural regions of parameter space, the 126 GeV Higgs has large...

(Dys)Zphilia or a custodial breaking Higgs at the LHC

Electroweak precision measurements established that custodial symmetry is preserved to a good accuracy in the gauge sector after electroweak symmetry breaking. However, recent LHC results might be interpreted as pointing towards Higgs couplings that do not respect such symmetry. Motivated by this possibility, we reconsider the presence of an explicitly custodial breaking coupling...

Lifting degeneracies in Higgs couplings using single top production in association with a Higgs boson

Current Higgs data show an ambiguity in the value of the Yukawa couplings to quarks and leptons. Not so much because of still large uncertainties in the measurements but as the result of several almost degenerate minima in the coupling profile likelihood function. To break these degeneracies, it is important to identify and measure processes where the Higgs coupling to fermions...

The PTH-calcium curve and the set point of calcium in primary and secondary hyperparathyroidism

Background. The regulation of PTH secretion by calcium is altered in patients with primary hyperparathyroidism (HPT). A similar abnormality may occur in secondary HPT, but comparisons of PTH secretion in normal subjects and those with secondary HPT have given contrasting results. Differences in baseline serum ionized calcium (ICa) may partly account for these conflicting results...

Olfactometric and rhinomanometric outcomes in post-menopausal women treated with hormone therapy: a prospective study

BACKGROUND: The aim of this prospective study was to evaluate the effects of hormone therapy (HT) on olfactory sensitivity in post-menopausal women. METHODS: Forty-six naturally post-menopausal women underwent rhinomanometric and olfactometric measurements to compare nasal airflow resistance values and olfactometric thresholds during the eighth month of HT treatment with baseline...

Vascular access

Introduction and Aims: All guidelines recommend an arteriovenous fistula (AVF) as preferred bloodstream access. Still, many patients in Europe receive haemodialysis (HD) via a permanent catheter. This ERBP initiated study explored potential barriers related to attitude, organisation and reimbursement that may explain non-adherence to this fistula-first (FF) policy. Methods: We...

Auditory brainstem response in premenopausal women taking oral contraceptives

BACKGROUND: The aim of this prospective study was to evaluate the effects of the new monophasic oral contraceptives on the audiological system in premenopausal women. METHODS: The auditory brainstem response (ABR) was measured in 94 women during the follicular, periovular and luteal phases of one menstrual cycle in which ovulation was confirmed using sonography and serum...

Clinical, endocrine and metabolic effects of acarbose, an α-glucosidase inhibitor, in PCOS patients with increased insulin response and normal glucose tolerance

BACKGROUND: The aim of this study was to evaluate whether treatment with acarbose, an α-glucosidase inhibitor, improved hyperandrogenic symptoms, insulin and androgen serum concentrations in hyperinsulinaemic patients with polycystic ovary syndrome (PCOS). METHODS: 30 hyperinsulinaemic women with PCOS and 15 controls were evaluated. Patients were randomized, using a computer...

Effect of high‐flux dialysis on the anaemia of haemodialysis patients

Background. Anaemia is one of the major clinical characteristics of patients with chronic renal failure, and has a considerable effect on morbidity and mortality. Adequate dialysis is of paramount importance in correcting anaemia by removing small and medium‐sized molecules, which may inhibit erythropoiesis. However, high‐molecular‐weight inhibitors cleared only by means of...