We present a radiology-pathology case series of 3 patients with coronavirus disease 2019 (COVID-19) with acute ischemic stroke due to fulminant carotid thrombosis overlying mild atherosclerotic plaque and propose a novel stroke mechanism: COVID-associated carotid atherothrombosis. ABBREVIATIONS: ACE2 ¼ angiotensin-converting enzyme 2; CCA ¼ common carotid artery; COVID-19 ¼ coronavirus disease 2019; RT-PCR ¼ reverse-transcriptase polymerase chain reaction; SARS-CoV-2 ¼ Severe Acute Respiratory Syndrome coronavirus 2
Within the framework of the cloudy bag model we show that the small difference of up-and down-quark masses leads to a small increase in the r O n n coupling constant relative to aOpp. There may be many experimental consequences of this observation but, as an example,
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