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Himalaya 4.2.3

Changes

  • [commit 240cfb3]: Update FindMathematica.cmake to version 4.0.0.

  • [commit 521f397]: Improve compatibility with conan 2.

  • [commit 8e88fb6]: Adding coverage monitor.

  • [commit 4d5bd5b]: Update dilog and clausen_2 functions from the polylogarithm package 7.0.0.

Himalaya 4.2.2

Changes

  • [commit f69949e]: For safety, set 3-loop contributions to Δλ of O(ab*as^2) explicitly to zero, as they are incomplete. The corresponding warning message is removed in order to not slow-down large parameter scans.

  • [commit 8be4ed8]: Remove expression of unknown/incorrect 1-loop threshold correction Δv of O(g1^2, g2^2) in order to speed-up compile time and avoid accidental usage. The corresponding warning message is removed in order to not slow-down large parameter scans.

Himalaya 4.2.1

Changes

  • [commit 340236c]: Calculate non-provided sfermion mixing angle theta_t, theta_b or theta_tau, if the equivalent value s2t, s2b or s2tau is given.

  • [commit 2b44497]: Avoid calculation of 1-loop corrections that are not requested.

Himalaya 4.2.0

Changes

  • Performance improvements of various loop functions.

  • [commit 232cadb]: Allow to disable Mathematica interface by setting the CMake variable ENABLE_MATHEMATICA (enabled by default).

Himalaya 4.1.1

Fixed bugs

  • [commit e9e102a]: Allow to disable the compilation of the example program by setting the CMake variable BUILD_EXAMPLES (enabled by default).

  • [commit cb6c51f]: Adding series expansion in B0 function for p2 << m2 to improve the precision for small momenta.

Himalaya 4.1.0

Changes

  • [commit 9a6b60b]: Performance improvement by ~25% by replacing the old FORTRAN implementation of the complex dilogarithm (dating back to 20.07.83, written by Wolfgang Hollik and Ansgar Denner) by a more performant one from the polylogarithm package 6.0.0.

  • [commit 1251eba]: Performance improvement by ~10% by replacing the complex logarithm by a faster implementation.

  • [commit 313d06d]: Require a C++-14 compatible compiler.

  • The source code directory has been slightly restructured to match the namespace hierarchy.

Fixed bugs

  • [commit 2b7fdee]: In the calculation of the average light squark mass the left-handed sup was counted twice, while the right-handed sup was not counted.

Himalaya 4.0.0

Changes

  • The public Himalaya headers have been moved to the include/himalaya/ directory. When installed, the public headers are now located in a himalaya/ sub-directory of include directory. As a consequence, the headers have to be included via

    #include "himalaya/HierarchyCalculator.hpp"

  • [commit 03022da]: Faster implementation of 2-loop function phi(x,y,z) [Davydychev and Tausk, Nucl. Phys. B397 (1993) 23] for degenerate mass spectra.

  • [commit eb52c7b]: Faster implementation of the dilogarithm function.

  • [commit d957fd7]: Update FindMathematica.cmake to version 3.3.0.

Himalaya 3.0.1

Changes

  • The threshold correction loop functions and the dilogarithm function have been replaced by cleaner and faster implementations.

Fixed bugs

  • [commit 4f063f1]: Fix linking error on MacOS.

Himalaya 3.0.0

New features

  • The 1-, 2- and 3-loop corrections of O(αt), O(αt*αs + αt^2) and O(αt*αs^2) to the squared light CP-even Higgs mass are now available in the EFT limit v^2 << MSUSY^2.

    At the C++ level one can use the following new accessors of the HierarchyObject class:

    • getDMh2EFTAt(int loops): Returns loop corrections in the EFT limit v^2 << MSUSY^2.
    • getDMh2FOAt(int loops): Returns loop corrections in the full MSSM.

    At the Mathematica level the following new symbols are provided in the output of HimalayaCalculateDMh3L[]:

    • Mh2EFTAt: Loop corrections in the EFT limit v^2 << MSUSY^2.
    • Mh2FOAt: Loop corrections in the full MSSM.

  • The full 1-loop, 2-loop O((αt+ab)*αs + (αt+αb)^2 + ab*aτ + aτ^2) and 3-loop O(αt*αs^2) to the squared light CP-even Higgs mass are now available.

    At the C++ level one can use the new accessor getDMh2FO(int loops) of the HierarchyObject class.

    At the Mathematica level the new symbol Mh2FO is provided in the output of HimalayaCalculateDMh3L[].

Changes

  • The getter to access the loop corrections to the light CP-even Higgs mass in the EFT limit has been renamed getDMh2EFT -> getDMh2EFTAt. The new name reflects that fact that only αt-enhanced contributions are returned.

  • The Mathematica symbol which contains the loop corrections to the light CP-even Higgs mass in the EFT limit has been renamed Mh2EFT -> Mh2EFTAt. The new name reflects that fact that only αt-enhanced contributions are included.

Himalaya 2.0.2

Changes

  • [commit 462c43c]: An exception is thrown if the (input) gluino mass parameter is negative.

    The implemented 2- and 3-loop contributions usually assume that M3 > 0. For this reason the gluino phase factor is absent from the expressions (i.e. has always been set to 1) and cannot be adjusted in case M3 < 0 to make the gluino mass positive.

Fixed bugs

  • [commit d7bffa7]: Update FindMathematica.cmake to version 3.2.5, which fixes a build error due to missing libuuid.

Himalaya 2.0.1

Changes

  • The estimate of the non-logarithmic contributions to the quartic Higgs coupling λ due to the hierarchy expansion has been changed: Xt^5 and Xt^6 terms are no longer taken into account in the uncertainty estimate, because they do not appear at 3-loop O(αt*αs^2). Only the Xt^4 term is used in the uncertainty estimate, if it is absent from the selected hierarchy. As a result, the uncertainty estimate is now symmetric in Xt.

Himalaya 2.0.0

New features

  • The 3-loop O(αt*αs^2) contribution to the CP-even Higgs mass matrix in the MSSM is now calulated in the DR'-bar scheme by default. Shifts to the MDR'-bar and H3m schemes are provided separately.

  • The 3-loop O(αt*αs^2) contribution to quartic Higgs coupling λ of the Standard Model is calculated in the DR'-bar scheme. A shift to the MS-bar scheme is provided separately.

  • A Mathematica interface for Himalaya has been added. See README.md for a usage example.

Changes

  • The default renormalization scheme for the input parameters has been changed to DR'-bar.

  • The names of the following member functions of the HierarchyObject class have been changed:

    • getExpUncertainty() -> getDMhExpUncertainty()
    • getDRToMDRShift() -> getDMhDRbarPrimeToMDRbarPrimeShift()

Himalaya 1.0.1

Improved debug output.

Himalaya 1.0

This is the initial release of the Himalaya library. The Himalaya library calculates the 3-loop O(at*as^2) contribution to the CP-even Higgs mass matrix in the MSSM in the DR-bar or MDR-bar scheme, given a set of MSSM DR-bar input parameters.