# CERN Preprints

2015-01-30
14:46
 Measurements of the $\Upsilon(1\mathrm{S})$, $\Upsilon(2\mathrm{S})$, and $\Upsilon(3\mathrm{S})$ differential cross sections in pp collisions at $\sqrt{s}$ = 7 TeV Differential cross sections as a function of transverse momentum $p_\mathrm{T}$ are presented for the production of $\Upsilon(n\mathrm{S})$ ($n$ = 1, 2, 3) states decaying into a pair of muons. [...] CERN-PH-EP-2015-007 ; CMS-BPH-12-006-003. - 2015. Additional information for the analysis - CMS AuthorList - Fulltext

2015-01-30
08:57
 Natural Quasi-Alignment with two Higgs Doublets and RGE Stability / Botella, F J ; Branco, G C ; Coutinho, António M ; Rebelo, M N ; Silva-Marcos, J I In the context of two Higgs doublet models, we study the conditions required in order to have stable quasi-alignment in flavour space. [...] arXiv:1501.07435 ; CERN-PH-TH-2015-012. - 2015. - 16 p. Preprint - Full text

2015-01-30
08:57
 The Flavour Portal to Dark Matter / Calibbi, Lorenzo ; Crivellin, Andreas ; Zaldivar, Bryan We present a class of models in which dark matter (DM) is a fermionic singlet under the Standard Model (SM) gauge group but is charged under a symmetry of flavour that acts as well on the SM fermions. [...] arXiv:1501.07268 ; ULB-TH-15-01 ; CERN-PH-TH-2015-010. - 2015. - 6 p. Preprint - Full text

2015-01-30
08:57
 Higgs boson decay into b-quarks at NNLO accuracy / Del Duca, Vittorio ; Duhr, Claude ; Somogyi, Gabor ; Tramontano, Francesco ; Trocsanyi, Zoltan We compute the fully differential decay rate of the Standard Model Higgs boson into b-quarks at next-to-next-to-leading order (NNLO) accuracy in alpha_S. [...] arXiv:1501.07226 ; CERN-PH-TH-2015-005 ; CP3-14-82. - 2015. - 30 p. Preprint - Full text

2015-01-29
08:12
 Measurement of the charge asymmetry in dileptonic decays of top quark pairs in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector / , A measurement of the top--antitop ($t\bar{t}$) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb$^{-1}$ of LHC $pp$ collisions at a centre-of-mass energy of 7 TeV collected by the ATLAS detector. [...] CERN-PH-EP-2014-233 ; arXiv:1501.07383. - 2015. - 33 p. Previous draft version - Full text - Full text

2015-01-28
14:22
 Search for direct pair production of a chargino and a neutralino decaying to the 125 GeV Higgs boson in $\sqrt{s}$ = 8 TeV pp collisions with the ATLAS detector / , A search is presented for the direct pair production of a chargino and a neutralino $pp\to\tilde{\chi}^\pm_1\tilde{\chi}^0_2$, where the chargino decays to the lightest neutralino and the $W$ boson, $\tilde{\chi}^\pm_1 \to \tilde{\chi}^0_1 (W^{\pm}\to\ell^{\pm}\nu)$, while the neutralino decays to the lightest neutralino and the 125 GeV Higgs boson, $\tilde{\chi}^0_2 \to \tilde{\chi}^0_1 (h\to bb/\gamma\gamma/\ell^{\pm}\nu qq)$. [...] CERN-PH-EP-2014-298 ; arXiv:1501.07110. - 2015. - 19 p. Previous draft version - Full text - Full text

2015-01-28
07:41
 Indirect $\boldsymbol{CP}$ Violation in $\boldsymbol{D^0 \rightarrow h^+ h^-}$ Decays at LHCb / Alexander, Michael (Glasgow U.) Indirect CP violation in the $D^0$ system can be probed by measuring the parameter $A_{\Gamma}$, defined as the CP asymmetry of the effective lifetime of the $D^0$ meson decaying to a CP eigenstate. [...] arXiv:1501.06464. - 2015. - 4 p. Preprint

2015-01-28
07:41
 Measurements of CP Violation and Mixing in Charm Decays at LHCb / Alexander, Michael (Glasgow U.) During run I, the LHCb experiment at the LHC, CERN, collected 1.0 fb$^{-1}$ of pp collisions at $\sqrt{s} = 7$ TeV and 2.0 fb$^{-1}$ at $\sqrt{s} = 8$ TeV, yielding the world's largest sample of decays of charmed hadrons. [...] arXiv:1501.06463. - 2015. - 5 p. Preprint

2015-01-27
17:11
 Measurement of indirect CP asymmetries in $D^0 \to K^-K^+$ and $D^0 \to \pi^-\pi^+$ decays / LHCb Collaboration Time-dependent $CP$ asymmetries in the decay rates of the singly Cabibbo-suppressed decays $D^0\rightarrow K^-K^+$ and $D^0\rightarrow \pi^-\pi^+$ are measured in $pp$ collision data corresponding to an integrated luminosity of 3.0 fb$^{-1}$ collected by the LHCb experiment. [...] arXiv:1501.06777 ; LHCB-PAPER-2014-069 ; CERN-PH-EP-2015-008. - 2015. - 20 p. Related data file(s) - Preprint - Full text - Related supplementary data file(s)

2015-01-25
14:47
 Measurement of the ratio $\mathcal{B}( \mathrm{B}^0_{s} \to \mathrm{J}/\psi\, \mathrm{f}_0(980))/\mathcal{B}(\mathrm{B}^0_{s} \to \mathrm{J}/\psi\, \phi(1020))$ in pp collisions at $\sqrt{s}$ = 7 TeV / , The ratio $R_{\, \mathrm{f}_0 / \phi}$ of the branching fractions of the $\mathrm{B}^0_{s}$ meson to the CP-odd eigenstate $\mathrm{J}/\psi\, \mathrm{f}_0(980)$ and to $\mathrm{J}/\psi\, \phi(1020)$ is measured, where $\mathrm{J}/\psi \to \mu^+\mu^-$, $\mathrm{f}_0 \to \pi^+\pi^-$, and $\phi \to \mathrm{K}^+\mathrm{K}^-$. [...] CERN-PH-EP-2015-003 ; CMS-BPH-14-002-003 ; arXiv:1501.06089. - 2015. Additional information for the analysis - CMS AuthorList - Full text - Full text