2022年
12/20
開催
開催日時
2022/12/20（火）11:00〜12:00
開催場所
ハイブリッド形式 : オンライン (Zoom) + セミナールーム（研究本館321,322)
講演者
Dr. Samadrita Mukherjee (Tata Institute)
言語
English
詳細ページ
お問い合わせ
愛甲将司／maiko-AT-post.kek.jp
概要
The discrepant measurement of the W mass by the CDF collaboration can be made consistent with all other current measurements, by the ATLAS, the LHCb, the D0, the LEP collaborations, and with the electroweak precision fit for $M_W$ in a minimal—albeit naive— an extension of the Standard Model. In our setup, there is only one new operator and a single new (pseudo-)scalar particle which manifests as an unaccounted-for contribution to missing energy. This simple extension is enough to simultaneously explain the different extractions of $M_W$ for a sizeable chunk of the parameter space. We support our analysis by extracting novel bounds on the new physics scenario from W-cross-section measurements and $WW$ cross-section measurements to show that parts of the parameter space are, indeed, still allowed. We also discuss possible ultraviolet completions of the setup. Finally, we present our predictions for $M_W$ that ATLAS and CMS would extract from their 13 TeV data.