@article{discovery10197273,
            year = {2024},
           month = {September},
          number = {6},
          volume = {110},
            note = {This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions.},
       publisher = {American Physical Society (APS)},
           title = {CMB lensing and Ly{\ensuremath{\alpha}} forest cross bispectrum from DESI's first-year quasar sample},
         journal = {Physical Review D},
             url = {http://dx.doi.org/10.1103/physrevd.110.063505},
          author = {Karacayll, NG and Martini, P and Weinberg, DH and Ferraro, S and De Belsunce, R and Aguilar, J and Ahlen, S and Armengaud, E and Brooks, D and Claybaugh, T and De La Macorra, A and Dey, B and Doel, P and Fanning, K and Forero-Romero, JE and Gontcho, SGA and Gonzalez-Morales, AX and Gutierrez, G and Guy, J and Honscheid, K and Kirkby, D and Kisner, T and Kremin, A and Lambert, A and Landriau, M and Le Guillou, L and Levi, ME and Manera, M and Meisner, A and Miquel, R and Mueller, E and Munoz-Guti{\'e}rrez, A and Myers, AD and Newman, JA and Nie, J and Niz, G and Palanque-Delabrouille, N and Percival, WJ and Poppett, C and Prada, F and Ravoux, C and Rezaie, M and Ross, AJ and Rossi, G and Sanchez, E and Schlafly, EF and Schlegel, D and Seo, H and Sprayberry, D and Tan, T and Tarl{\'e}, G and Weaver, BA and Zou, H},
        abstract = {The squeezed cross-bispectrum B{\ensuremath{\kappa}},Ly{\ensuremath{\alpha}} between the gravitational lensing in the cosmic microwave background and the 1D Ly{\ensuremath{\alpha}} forest power spectrum can constrain bias parameters and break degeneracies between {\ensuremath{\sigma}}8 and other cosmological parameters. We detect B{\ensuremath{\kappa}},Ly{\ensuremath{\alpha}} with 4.8{\ensuremath{\sigma}} significance at an effective redshift zeff=2.4 using Planck PR3 lensing map and over 280,000 quasar spectra from the Dark Energy Spectroscopic Instrument's first-year data. We test our measurement against metal contamination and foregrounds such as Galactic extinction and clusters of galaxies by deprojecting the thermal Sunyaev-Zeldovich effect. We compare our results to a tree-level perturbation theory calculation and find reasonable agreement between the model and measurement.}
}