We present a first proof of concept to directly use neural network based pattern recognition to trigger on distinct calorimeter signatures from displaced particles, such as those that arise from the ...decays of exotic long-lived particles. The study is performed for a high granularity forward calorimeter similar to the planned high granularity calorimeter for the high luminosity upgrade of the CMS detector at the CERN Large Hadron Collider. Without assuming a particular model that predicts long-lived particles, we show that a simple convolutional neural network, that could in principle be deployed on dedicated fast hardware, can efficiently identify showers from displaced particles down to low energies while providing a low trigger rate.
The electron-positron stage of the Future Circular Collider, FCC-ee, is a frontier factory for Higgs, top, electroweak, and flavour physics. It is designed to operate in a 100 km circular tunnel ...built at CERN, and will serve as the first step towards ≥100 TeV proton-proton collisions. In addition to an essential and unique Higgs program, it offers powerful opportunities to discover direct or indirect evidence of physics beyond the Standard Model. Direct searches for long-lived particles at FCC-ee could be particularly fertile in the high-luminosity
Z
run, where 5 × 10
12
Z
bosons are anticipated to be produced for the configuration with two interaction points. The high statistics of Higgs bosons,
W
bosons and top quarks in very clean experimental conditions could offer additional opportunities at other collision energies. Three physics cases producing long-lived signatures at FCC-ee are highlighted and studied in this paper: heavy neutral leptons (HNLs), axion-like particles (ALPs), and exotic decays of the Higgs boson. These searches motivate out-of-the-box optimization of experimental conditions and analysis techniques, which could lead to improvements in other physics searches.
We report on a search for charged massive long-lived particles (CMLLPs), based on 5.2 fb{sup -1} of integrated luminosity collected with the D0 detector at the Fermilab Tevatron p{bar p} collider. We ...search for events in which one or more particles are reconstructed as muons but have speed and ionization energy loss (dE/dx) inconsistent with muons produced in beam collisions. CMLLPs are predicted in several theories of physics beyond the standard model. We exclude pair-produced long-lived gaugino-like charginos below 267 GeV and higgsino-like charginos below 217 GeV at 95% C.L., as well as long-lived scalar top quarks with mass below 285 GeV.
Differential reinforcement of low rates of responding was used to reduce the disruptive behaviors of a blind 12-year-old boy with a learning disability. The subject earned reinforcers by not ...exceeding the established criterion of disruptive behaviors. An overall 88 percent reduction in target behaviors was observed across a 26-day period. (Author/DB)
The electron-positron stage of the Future Circular Collider, FCC-ee, is a frontier factory for Higgs, top, electroweak, and flavour physics. It is designed to operate in a 100 km circular tunnel ...built at CERN, and will serve as the first step towards \(\geq\) 100 TeV proton-proton collisions. In addition to an essential and unique Higgs program, it offers powerful opportunities to discover direct or indirect evidence of physics beyond the Standard Model. Direct searches for long-lived particles at FCC-ee could be particularly fertile in the high-luminosity \(Z\) run, where \(5\times 10^{12}\) \(Z\) bosons are anticipated to be produced for the configuration with two interaction points. The high statistics of Higgs bosons, \(W\) bosons and top quarks in very clean experimental conditions could offer additional opportunities at other collision energies. Three physics cases producing long-lived signatures at FCC-ee are highlighted and studied in this paper: heavy neutral leptons (HNLs), axion-like particles (ALPs), and exotic decays of the Higgs boson. These searches motivate out-of-the-box optimization of experimental conditions and analysis techniques, that could lead to improvements in other physics searches.
We report on a search for charged massive long-lived particles (CMLLPs), based on 5.2 fb\(^{-1}\) of data collected with the D0 detector at the Fermilab Tevatron \(p\bar{p}\) collider. CMLLPs are ...predicted in many theories of physics beyond the standard model. We look for events in which one or more particles are reconstructed as muons but have speed and ionization energy loss \(dE/dx\) inconsistent with muons produced in beam collisions. We present 95% C.L. upper limits on the production cross section for long-lived scalar taus, for long-lived charginos in two SUSY scenarios, and for long-lived scalar top quarks. We also present exclusion mass ranges for the chargino and scalar top quark models.
Better drying with infrared Alimena, J
Process Heating,
05/2003, Letnik:
10, Številka:
4
Magazine Article, Trade Publication Article
Want to reduce energy costs, increase productivity and improve product quality? Here are four things you can do with infrared to improve your drying process. Drying coatings or saturants on ...substrates is a common process heating application. The simple process of evaporating water or other solvent from a coating can consume large amounts of energy. Moreover, the rate at which a coating is dried on a product while it is being manufactured often is the critical factor in determining how fast the manufacturing line can run; likewise, product quality often is determined by how smoothly or thoroughly a coating is dried. Therefore, any improvement in drying can reduce energy costs, increase productivity and improve product quality. One way to improve drying operations is to add or use infrared energy.
To describe the quality of life of women at an increased risk of ovarian cancer undergoing risk-reducing bilateral salpingo-oophorectomy (RRBSO).
Patients evaluated in our gynecologic oncology ...ambulatory practice between January 2018–December 2019 for an increased risk of ovarian cancer were included. Patients received the EORTC QLQ-C30 and PROMIS emotional and instrumental support questionnaires along with a disease-specific measure (PROM). First and last and pre- and post-surgical PROM responses in each group were compared as were PROMs between at-risk patients and patients with other ovarian diseases.
195 patients with an increased risk of ovarian cancer were identified, 155 completed PROMs (79.5%). BRCA1 or BRCA2 mutations were noted in 52.8%. Also included were 469 patients with benign ovarian disease and 455 with ovarian neoplasms. Seventy-two at-risk patients (46.5%) had surgery and 36 had both pre- and post-operative PROMs. Post-operatively, these patients reported significantly less tension (p = 0.011) and health-related worry (p = 0.021) but also decreased levels of health (p = 0.018) and quality of life <7d (0.001), less interest in sex (p = 0.014) and feeling less physically attractive (p = 0.046). No differences in body image or physical/sexual health were noted in at-risk patients who did not have surgery. When compared to patients with ovarian neoplasms, at-risk patients reported lower levels of disease-related life interference and treatment burden, less worry, and better overall health.
In patients with an increased risk of ovarian cancer, RRBSO is associated with decreased health-related worry and tension, increased sexual dysfunction and poorer short-term quality of life. Patients with ovarian neoplasms suffer to a greater extent than at-risk patients and report higher levels of treatment burden and disease-related anxiety.
•Patients at risk of ovarian cancer experience less health-related worry and tension after risk-reducing surgery.•RRSO is associated with decreased short-term quality of life and higher levels of sexual dysfunction.•Patients with ovarian neoplasms suffer more more than at-risk patients and report higher levels of treatment burden and anxiety.
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Hadron Collider (LHC) ...at CERN, these long-lived particles (LLPs) can decay far from the interaction vertex of the primary proton-proton collision. Such LLP signatures are distinct from those of promptly decaying particles that are targeted by the majority of searches for new physics at the LHC, often requiring customized techniques to identify, for example, significantly displaced decay vertices, tracks with atypical properties, and short track segments. Given their non-standard nature, a comprehensive overview of LLP signatures at the LHC is beneficial to ensure that possible avenues of the discovery of new physics are not overlooked. Here we report on the joint work of a community of theorists and experimentalists with the ATLAS, CMS, and LHCb experiments-as well as those working on dedicated experiments such as MoEDAL, milliQan, MATHUSLA, CODEX-b, and FASER-to survey the current state of LLP searches at the LHC, and to chart a path for the development of LLP searches into the future, both in the upcoming Run 3 and at the high-luminosity LHC. The work is organized around the current and future potential capabilities of LHC experiments to generally discover new LLPs, and takes a signature-based approach to surveying classes of models that give rise to LLPs rather than emphasizing any particular theory motivation. We develop a set of simplified models; assess the coverage of current searches; document known, often unexpected backgrounds; explore the capabilities of proposed detector upgrades; provide recommendations for the presentation of search results; and look towards the newest frontiers, namely high-multiplicity 'dark showers', highlighting opportunities for expanding the LHC reach for these signals.
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