594 research outputs found

    Quality By Design: A Systematic Approach for the Analytical Method Validation

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    The scientific way to develop an easy and robust analytical technique for critical analysis is a QbD approach. QbD is a systematic approach to product or method development that begins with predefined objectives and uses science and risk management approaches to achieve product and method understanding and ultimately method control. The aim of the analytical QbD is to achieve quality in measurement. The main objective of this review to explain different steps involved in method development by the QbD approach for analytical method development and describes the implementation of QbD in analytical procedure validation. The advantages of applying QbD principles to analytical technique include discovering and minimizing the source of variability that may lead to poor method robustness and ensuring that the method meets its intended performance need throughout the product and method lifecycle. Keywords: Quality by design (QbD), Risk Analysis, Analytical method validatio

    Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

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    A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

    Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV